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Club Race Preparation
Club Racing is fender-to-fender, amateur road racing competition on a road course.
Club racing requires a purpose built race car, safety equipment, and a competition license from the
club.
The Geo Storm has a long history of racing in the SCCA's Improved Touring classes, and has seen some
nationally recognized success.
In addition to this, between 1990 and 1992, Chevrolet sponsored several years of SCCA Club Racing
sanctioned "Celebrity" races as part of the Grand Prix road races in New York, Long Beach, Dallas,
and other locations. These events put a group of celebrities in identically prepared Geo Storm cars
(in Showroom Stock preparation, essentially stock with safety equipment installed).
The Geo Storm's Isuzu sister cars, the Impulse and Stylus, were banned from SCCA club racing for
ten years following their introduction. The reason given was that "the Lotus Tuned suspension
(and rear disc brakes) gives them too much of an unfair advantage".
The Impulse RS AWD was excluded from all SCCA club racing classes until the introduction of the
Super Touring Under and Super Touring Over (Now GT12/ST) classes, which are the first SCCA club racing
classes to allow factory installed turbocharged vehicles.
The Geo Storm has seen enough action in the NASA Performance Tuning classes that is received
formal baseline classing.
SCCA - The Sports Car Club of America
The Sports Car Club of America (SCCA) has the largest and most widely distributed club racing program
in the US.
The SCCA has adopted a rigid
structure which divides cars into groups from unmodified to highly modified,
proscribing the specific modifications allowed in each class. Most of these classes are then
subdivided with an alphabetic letter designation, grouping together specific models of vehicles which are
of comparable performance level or description (engine displacement, body type, number of doors, etc.).
The caveat of the rules is "If the rule book specifically says you can do it, then its allowed, if the rule
book doesn't specifically say you can do it, then you can't do it.".
Building a "competitive" car involves determining the vehicle's class, reading the rules, and performing or
installing every single modification allowed within the class rules. Although, the SCCA states that they
"Do not guarantee every car will be competitive.".
The SCCA has reasonably thorough nationwide coverage, but there are fewer race tracks than there are
SCCA regions. The travel distance may be upwards of 500 miles.
The SCCA Classes for Geo Storm
-
Improved Touring
- Geo Storm GSi: ITB
- Geo Storm Base: ITC
Improved Touring is described as providing a venue for: low cost cars with limited modifications, suitable
for racing competition.
IT is further described by the following statement: It is the intent of these rules to restrict
modifications to those useful and necessary to construct a safe race car. This class is intended to allow a
variety of popular, inexpensive cars to be eligible.
Improved Touring is a regional class, meaning that this class is not included in the championship runnoffs.
Production - Formal classification would require a letter to the SCCA
Production is described as a venue to: provide the membership with an opportunity to compete in series
produced cars. While a Production car retains many stock components, the current rules allow for high
performance modifications to enhance the safety,
power and handling of the car.
The SCCA website adds: Series produced cars, which are allowed a range of performance modifications while
retaining their original design, structure and drive layout. There is no age limit, such as Showroom Stock,
so Production includes many cars as old as 50 years and as new as current body styles.
Production allowances are divided into Level 1 (Full Prep) and Level 2 (Limited Prep), depending on which
preparation level that the SCCA decides will best match the vehicle with the level of competition with the
other cars it is to be classed with.
Super Touring
Super Touring is described as providing a venue to: allow competition of production-based vehicles, at a
higher level of preparation, using DOT-approved tires. Vehicles used in this category must be identifiable
with the vehicles offered for sale to the public.
The SCCA website adds: Super Touring features late-model production-based vehicles with a series of
modifications to their drivelines and bodywork. The intent of the rules allows World Challenge cars to
compete in Club Racing with minimal modifications as well as new cars to be built to the same spec as well.
Forced induction may be added to some models and engine swaps are permitted.
Super Touring is an all inclusive class including just about every car sold in the US. The Geo Storm is
allowed in either of the Super Touring classes, and the decision comes down to which of the classes allows
the desired modifications. The Super Touring Under class allows significant brake and suspension modifications,
and going against the normal prohibitions against forced inductions, Super Touring is one of the only
places allowing the addition of a turbocharger. With the addition of highly modified brakes, suspension,
and a turbocharger, a light weight and nimble car like the Geo Storm becomes a force to be reckoned with.
The SCCA absolves itself of responsibility by stating that it does not guarantee that any particular car
will be competitive.
Super Touring is further subdivided:
Super Touring Light - STL
Super Touring Light (STL) is a small-bore “tuner” class for reciprocating piston engines of displacements
of 2.0 liters and under. STL encompasses a lower level of allowed modifications compared to STU.
STL prohibits forced induction. STL started out as a very stripped down class, but in the last several
years, the allowed modifications have been dramatically increased in the areas of suspension and brakes,
the two areas that the Storm and its FWD Isuzu sister cars benefit the most. The remaining performance
limitations (to limit class speed) for wheel, tire, brake rotor, and engine build, are really beyond
the size limitations of a Geo Storm, and the car can be built to the class limit with the potential to
run very competitively.
Super Touring Under - STU
Super Touring Under (STU) vehicles are mid-level multi-purpose performance cars of 3.2 liters and under.
STU allowed forced induction and engine transplants up to 3.2 liter V6 size. This is a very good venue
for Geo Storms with a turbo engine transplanted from a Impulse RS AWD, or one of the aluminum block, DOHC
V6 engines from an Isuzu SUV.
The following chart is based on interpretation of the 2013 SCCA rulebook. Interpretation is
subject to debate. Check the rule book yourself before making any decisions and consult with
the SCCA officials in the event of any questions.
The complete rule book is available online
as a PDF file on the SCCA website.
The following chart has been tailored specifically to the classes and modifications which are
common to and logical for the Geo Storm and its Isuzu sister cars.
Club Racing has traditionally shunned vehicles with forced induction engines both as standard equipment,
and as performance upgrades. The recently introduced Super Touring classes are a conspicuous departure
from that pattern, and this is the only place in the SCCA's program that the Storms sister car, the
Impulse RS AWD, and Storms with turbo kits, may race within the SCCA's Club Racing program.
The modification categories have been laid out in a similar pattern as the SCCA rule book. This
pattern reveals the concerns and priorities of the SCCA in regulating competition. Some format
order changes have been made to present related topics together.
Drivetrain Modifications - Induction
Drivetrain Modifications - Fuel Delivery
Drivetrain Modifications - Emissions Controls
| Modification |
Improved Touring |
Production Level 2 (Limited Prep) |
Production Level 1 (Full Prep) |
Super Touring Light |
Super Touring Under |
Remove and/or Disable Emissions Control Devices |
Yes |
Yes |
Yes |
Yes |
Yes |
Drivetrain Modifications - Cylinder Head
| Modification |
Improved Touring |
Production Level 2 (Limited Prep) |
Production Level 1 (Full Prep) |
Super Touring Light |
Super Touring Under |
Port Match Head One Inch Depth |
Yes |
Yes |
Yes |
Yes |
Yes |
Cylinder Head Porting |
No |
No |
Within Specified Limits |
No |
Yes - With Weight Penalty |
O-Ring Reinforce Cylinder Bores |
No |
Yes |
Yes |
Yes |
Yes |
Drivetrain Modifications - Camshafts and Valvetrain
Engine Swaps
Drivetrain Modifications - Engine Block
| Modification |
Improved Touring |
Production Level 2 (Limited Prep) |
Production Level 1 (Full Prep) |
Super Touring Light |
Super Touring Under |
Stock Spec Minimum Overbore Engine Rebuild |
.0472"
Limit |
Unrestricted |
.040"
Limit |
.040"
Limit |
.040"
Limit |
Resleeve Block |
No |
Yes - Any Material |
Yes - Any Material |
Yes |
Yes |
Maximum Displacement |
Stock With Allowed Overbore |
Stock With Allowed Overbore |
Stock With Allowed Overbore |
Engine Swap - 2.0 liter Limit, 4 Cylinder Limit |
Engine Swap - 3.2 liter Limit, 6 Cylinder Limit |
Balance, But Not Lighten, Rotating and Reciprocating Parts |
Yes |
No |
No |
Yes |
Yes |
Racing Engine Rebuild, Unrestricted:
Pistons,
Rods,
Crankshaft,
Camshafts, Etc. |
No |
No |
No |
No |
No |
Drivetrain Modifications - Pistons and Connecting Rods
Drivetrain Modifications - Cranksahft, Flywheel, and Clutch
Drivetrain Modifications - Oiling System
| Modification |
Improved Touring |
Production Level 2 (Limited Prep) |
Production Level 1 (Full Prep) |
Super Touring Light |
Super Touring Under |
Any Mechanical Oil Pump |
Yes |
Yes |
Yes |
Yes |
Yes |
Change Oil Pan |
Yes |
Yes |
Yes |
Yes |
Yes |
Add Windage Tray (If Not OEM) |
Yes |
Yes |
Yes |
Yes |
Yes |
Add Crank Scraper |
Yes |
Yes |
Yes |
Yes |
Yes |
Oil Pressure Accumulator |
Yes |
Yes |
Yes |
Yes |
Yes |
Dry Sump System |
No |
No |
No |
No |
Yes |
Electrical And Ignition System Modifications
Drivetrain Modifications - Exhaust
| Modification |
Improved Touring |
Production Level 2 (Limited Prep) |
Production Level 1 (Full Prep) |
Super Touring Light |
Super Touring Under |
Exhaust Must Exit Behind Driver |
Yes |
Yes |
Yes |
Yes |
Yes |
Cat Back Exhaust |
Yes |
Yes |
Yes |
Yes |
Yes |
Exhaust Header |
Yes |
Yes |
Yes |
Yes |
Yes |
Upgrade Down Pipe (Impulse RS AWD) |
NA |
NA |
NA |
Yes |
Yes |
High Flow Catalytic Converter |
Yes |
Yes |
Yes |
Yes |
Yes |
Delete Catalytic Converter |
Yes |
Yes |
Yes |
Yes |
Yes |
Drivetrain Modifications - Other Engine Components
| Modification |
Improved Touring |
Production Level 2 (Limited Prep) |
Production Level 1 (Full Prep) |
Super Touring Light |
Super Touring Under |
Electric Water Pump |
No |
No |
No |
Yes |
Yes |
Polyurethane Engine and Transmission Mount Bushings |
Yes |
Yes |
Yes |
Yes |
Yes |
Solid Metal Engine and Transmission Mount Bushings |
No |
Yes |
Yes |
Yes |
Yes |
Add One (1) Torque Suppression Device |
Yes |
NA |
NA |
NA |
NA |
Unrestricted Number Of Torque Suppression Devices |
No |
Yes |
Yes |
Yes |
Yes |
Aluminum Underdrive Crank Pulley and
Accessory Pulleys |
Yes |
Yes |
Yes |
Yes |
Yes |
Drivetrain Modifications - Forced Induction System
| Modification |
Improved Touring |
Production Level 2 (Limited Prep) |
Production Level 1 (Full Prep) |
Super Touring Light |
Super Touring Under |
Change Turbo Manifold of OEM Turbo (Impulse RS AWD) |
NA |
NA |
NA |
NA |
Yes |
Add or Upgrade Blow Off Valve to OEM Turbo (Impulse RS AWD) |
NA |
NA |
NA |
NA |
Yes |
Change Intercooler of OEM Turbo (Impulse RS AWD) |
NA |
NA |
NA |
NA |
Yes |
Boost Controller (Electronic or Manual) for OEM Turbo (Impulse RS AWD)(Controls Mounted Out Of Driver's Reach) |
NA |
NA |
NA |
NA |
Yes |
Port Wastegate for OEM Turbo (Impulse RS AWD) |
NA |
NA |
NA |
NA |
Yes |
Change Turbocharger for OEM Turbo (Impulse RS AWD) |
NA |
NA |
NA |
NA |
Requires SCCA Approval |
Add Turbocharger To Naturally Aspirated Car (Turbo Kit) |
NA |
NA |
NA |
Requires SCCA Approval |
Requires SCCA Approval |
Engine Swap 4XE1 Turbo Engine And Use OEM Turbocharger |
No |
No |
No |
No |
Yes |
Turbocharger Inlet Air Restrictor |
NA |
NA |
NA |
NA |
Size Depends On Vehicle Weight |
Add Supercharger To Naturally Aspirated Car (Blower Kit) |
NA |
NA |
NA |
NA |
Requires SCCA Approval |
Drivetrain Modifications - Transmission
| Modification |
Improved Touring |
Production Level 2 (Limited Prep) |
Production Level 1 (Full Prep) |
Super Touring Light |
Super Touring Under |
Any Non-Sequential, Manual Shifting Transmission With A Reverse Gear |
No |
Yes |
Yes |
No |
Yes |
Transmission Required To Be From Same Manufacturer As Vehicle |
OEM Only |
NA |
NA |
Yes |
NA |
Any Gear Ratios |
No |
Yes |
Yes |
No |
Yes |
Any Shift Linkage |
No |
Yes |
Yes |
Yes |
Yes |
Drivetrain Modifications - Final Drive
| Modification |
Improved Touring |
Production Level 2 (Limited Prep) |
Production Level 1 (Full Prep) |
Super Touring Light |
Super Touring Under |
Add Limited Slip Differential(s) |
Yes |
Yes |
Yes |
Yes |
Yes |
Any Final Drive Ratio |
Yes |
Yes |
Yes |
Yes |
Yes |
Change Differential Carrier Bushing Material (Polyurethane) |
NA |
NA |
NA |
NA |
Yes |
Suspension Modifications
| Modification |
Improved Touring |
Production Level 2 (Limited Prep) |
Production Level 1 (Full Prep) |
Super Touring Light |
Super Touring Under |
Convert Front Suspension to Double Wishbone / A Arm |
No |
No |
No |
No |
No |
Convert Rear Suspension to Double Wishbone / A Arm |
No |
No |
No |
No |
No |
Modify, Reinforce, Or Replace Suspension Arm (Without Changing Type) |
No |
Yes |
Yes |
Yes |
Yes |
Change/Relocate Suspension Pivot / Pickup Points |
No |
No |
Yes |
No |
Yes - Lower Within 1", Upper Within 3" |
Roll Center Correction / Extended Ball Joints |
No |
No |
No |
Yes |
Yes |
Change Ride Height |
Yes - 5 Inch Minimum |
Yes |
Yes |
Yes - 5 Inch Minimun At Rocker Panel |
Yes - 4 Inch Minimun At Rocker Panel |
Change Suspension Bushing Material (Polyurethane) |
Yes |
Yes |
Yes |
Yes |
Yes |
Heim Joint Suspension Joints |
Yes |
Yes |
Yes |
Yes |
Yes |
Add, Remove, or Modify One Sway Bar (Front or Rear) |
Yes |
Yes |
Yes |
Yes |
Yes |
Add, Remove, or Modify Both Sway Bars |
Yes |
Yes |
Yes |
Yes |
Yes |
Change Sway Bar Bushing Material (Polyurethane) |
Yes |
Yes |
Yes |
Yes |
Yes |
Camber Plates |
Yes |
Yes |
Yes |
Yes |
Yes |
Crash Bolts / Camber Bolts |
Yes |
Yes |
Yes |
Yes |
Yes |
Slot Suspension Mount Holes |
Yes |
Yes |
Yes |
Yes |
Yes |
Any Material For Subframe And Cross Member Bushings |
Yes |
Yes |
Yes |
Yes |
Yes |
Any Damper |
Yes |
Yes |
Yes |
Yes |
Yes |
Change Strut Housing Dimensions |
Yes |
Yes |
Yes |
Yes |
Yes |
Change Spring Rate |
Yes |
Yes |
Yes |
Yes |
Yes |
Use Any (Non-OEM) Coil Spring |
Yes |
Yes |
Yes |
Yes |
Yes |
Adjustable Spring Perch |
Yes |
Yes |
Yes |
Yes |
Yes |
Coilovers |
No |
No |
Yes |
Yes |
Yes |
Suspension Braces Modifications
| Modification |
Improved Touring |
Production Level 2 (Limited Prep) |
Production Level 1 (Full Prep) |
Super Touring Light |
Super Touring Under |
Limit One (1) Total Suspension Brace (Select Strut, Lower Tie) |
Yes |
NA |
NA |
NA |
NA |
Two Point Strut Braces
(Front and Rear)
(Non-Triangulated) |
Limit One Suspension Brace |
No |
No |
Yes |
Yes |
Two Point Lower Tie Bars
(Front and Rear)
(Non-Triangulated) |
Limit One Suspension Brace |
No |
No |
Yes |
Yes |
Steering Modifications
| Modification |
Improved Touring |
Production Level 2 (Limited Prep) |
Production Level 1 (Full Prep) |
Super Touring Light |
Super Touring Under |
Change to Another Power Steering Rack (Change Ratio) |
Yes |
Yes |
Yes |
No |
No |
Change Steering Rack Bushings (Polyurethane) |
Yes |
Yes |
Yes |
Yes |
Yes |
Change Outer Tie Rods To Rod Ends |
Yes |
Yes |
Yes |
Yes |
Yes |
Delete Power Steering |
Yes |
Yes |
Yes |
Yes |
Yes |
Cooling System Modifications
Brake System Modifications
Wheel And Tire Modifications
| Modification |
Improved Touring |
Production Level 2 (Limited Prep) |
Production Level 1 (Full Prep) |
Super Touring Light |
Super Touring Under |
Change Wheel Size |
Yes |
Yes |
Yes |
Yes |
Yes |
Change Wheel Offset |
Yes |
Yes |
Yes |
Yes |
Yes |
Maximum Wheel Width |
6 Inch |
Any |
Any |
7 Inch |
8 Inch |
Maximum Wheel Diameter |
15 Inch |
Any |
Any |
17 Inch |
17 Inch |
Wheel Spacers |
Yes |
Yes |
Yes |
Yes |
Yes |
Maximum Tread Width |
Any |
Any |
Any |
225mm |
245mm |
Tire Tread (Which Contacts Ground) Shall Not Be Exposed Past The Fender Lip (Wheel/Tire Width Limitation) |
Yes |
NA |
NA |
NA |
NA |
Body - Structural Reinforcement
| Modification |
Improved Touring |
Production Level 2 (Limited Prep) |
Production Level 1 (Full Prep) |
Super Touring Light |
Super Touring Under |
Seam Welding |
No |
No |
No |
Yes |
Yes |
Body Modifications - Weight Reduction And Venting
| Modification |
Improved Touring |
Production Level 2 (Limited Prep) |
Production Level 1 (Full Prep) |
Super Touring Light |
Super Touring Under |
Body Side Moldings, Rocker Panel Moldings, Wheel Opening Trim Pieces (Not Fender Flares) |
Yes |
Yes |
Yes |
Yes |
Yes |
Lighten Unibody Structure (May Not Compromise Structural Rigidity To The Point Of Requiring Reinforcement) |
No |
Yes |
Yes |
Yes |
Yes |
Fiberglass or Carbon Fiber Hoods,
Fenders, Front and Rear Fascias |
No |
Yes |
Yes |
Yes |
Yes |
Hood Vents and Louvers |
No |
No |
No |
Yes |
Yes |
Fiberglass or Carbon Fiber Hatch |
No |
Yes |
Yes |
Yes |
Yes |
Roll Fender Lips |
Yes |
Yes |
Yes |
Yes |
Yes |
Add Fender Flares |
No |
Yes |
Yes |
No |
No |
Modify Or eplace Inner Fender Panels |
No |
No |
No |
Yes |
Yes |
One Piece Front Section |
No |
No |
No |
No |
No |
Reproduction OEM Bumper Covers Made Of Alternate Material (Carbon Fiber, Fiberglass) |
No |
Yes |
Yes |
No |
No |
Remove Energy Absorption Components |
Yes |
Yes |
Yes |
Yes |
Yes |
Polycarbonate Windshield (6mm) |
Yes |
Yes |
Yes |
Lexan - .25 Inch |
Lexan - .25 Inch |
Polycarbonate Windows (3mm) |
Yes |
Yes |
Yes |
Lexan - .125 Inch, Rear Side Windows Only |
Lexan - .125 Inch, Rear Side Windows Only |
Remove Front Side Windows |
Yes |
Yes |
Yes |
Yes |
Yes |
Remove Rear Side Windows And Rear Window |
Yes |
Yes |
Yes |
No |
No |
Remove Side And Rear Window Mounting Hardware |
Yes |
Yes |
Yes |
No |
No |
Install Driver Cooling Ducts In Side Windows |
Yes |
Yes |
Yes |
Front Only, See Rule Book |
Front Only, See Rule Book |
Remove Sunroof, Fill In With Steel Panel |
Required |
Required |
Required |
Required |
Required |
Remove Headlights And Turn Signals, Fill In Openings Or Use As Ducts |
Yes |
Yes |
Yes |
Yes |
Yes |
Remove Side Lights And Fill In Openings |
Yes |
Yes |
Yes |
Yes |
Yes |
Remove Tail Lights And Fill In Openings |
No |
No |
Yes |
No |
No |
Modify Or Remove Wipers (Openings Must Be Filled) |
Yes |
Yes |
Yes |
Must Retain One Working Wiper |
Must Retain One Working Wiper |
Remove Interior Ventilation Ducts |
Yes |
Yes |
Yes |
Yes |
Yes |
Body Modifications - Aerodynamics
Body - Driver/Passenger/Trunk Compartment
| Modification |
Improved Touring |
Production Level 2 (Limited Prep) |
Production Level 1 (Full Prep) |
Super Touring Light |
Super Touring Under |
Change Steering Wheel (Non Wood Rim) |
Yes |
Yes |
Yes |
Yes |
Yes |
Disable Airbag Electrically |
Required |
Required |
Required |
Required |
Required |
Remove Airbag Assembly |
Yes |
Yes |
Yes |
Required |
Required |
Pedal Covers |
Yes |
Not Stated |
Not Stated |
Yes |
Yes |
Replace Driver Seat With One Piece Racing Seat, To The Left Of Center |
Required |
Required |
Required |
Required |
Required |
Remove Dashboard |
Yes |
Yes |
Yes |
No |
Yes |
Add Or Remove Instrumentation And/Or Gauges |
Yes |
Yes |
Yes |
Yes |
Yes |
Remove Interior Trim, Panels, Floor Covering, And Passenger And Rear Seats |
Yes |
Yes |
Yes |
Yes |
Yes |
Completely Strip Interior (Headliner, Handles, Dome Lights, Insulation, Etc.) |
Yes |
Not Stated |
Not Stated |
Yes |
Yes |
Any Interior And Exterior Mirrors |
Yes |
Not Stated |
Not Stated |
Yes |
Yes |
Remove Spare Tire, Jack, Etc. |
Yes |
Yes |
Yes |
Required |
Required |
Safety
| Modification |
Improved Touring |
Production Level 2 (Limited Prep) |
Production Level 1 (Full Prep) |
Super Touring Light |
Super Touring Under |
Roll Cage - Per Class Specific Requirements |
Required |
Required |
Required |
Required |
Required |
SFI Approved Window Net For Driver's Side Window |
Required |
Required |
Required |
Required |
Required |
Scatter Shield Around Transmission Bellhousing |
Not Required |
Required |
Required |
Required |
Required |
Front And Rear Towing Eyes |
Required |
Required |
Required |
Required |
Required |
Master Switch / Battery Power Cut Switch |
Required |
Required |
Required |
Required |
Required |
On Board Fire System |
Not Required |
Required |
Required |
Not Required |
Not Required |
Two Operable Brake Lights |
Required |
Required |
Required |
Required |
Required |
Use Stock Fuel Tank (Located Between Axles And Within Structure) |
Yes |
Yes |
Yes |
Yes |
Yes |
Replace Gas Tank With Fuel Cell |
Yes |
Yes |
Yes |
Yes |
Yes |
NASA - The National Auto Sport Association
The National Auto Sport Association (NASA) was started by SCCA members who were dissatisfied with the
rules and hierarchy of the SCCA. NASA takes a decidedly different approach to car classing and
fluidity of adjusting cars and modifications up or down the scale to level the field of competition.
They apply the same classing structure to both Performance Touring class club/road racing as they do
to autocross.
NASA has a very large presence on the East Coast, and a large presence in Southern California. The
organization expanded rapidly toward the middle of the country. NASA's club racing program remains
strong.
The NASA Performance Touring class system uses a single ladder of classes, assigning each make and model
of car to a base class, and moving the car up to the next class rung based on points assigned to the
modifications done to the car. This drastically reduces the number of classes and allowed the competitor
to choose whichever modifications they desire.
The baseline class of a car is determined by the vehicle's power to weight ratio, total weight, engine
torque measurement across engine RPM range, body style, engine location, suspension layout, and equipment
technology. Baseline class may be adjusted up or down by the organization if the vehicle is proven
to be an under-dog or an over-dog in competition.
Modified vehicles are moved up in class from their base class based on the total of points counted for
the modifications done to the vehicle.
If a car accumulates 20 points (including base class points if applicable), it moves up to the next
class. In order to further equalize competition, cars can be classed "between" ladder rungs, by
assigning 7 points (noted by a single asterisk) or 14 points (noted by two asterisks) to their
base line classing.
As the point system has evolved, points levied for weight reduction, tire width changes, engine
displacement changes, and compression ratio changes, have introduced a surprising level of complication
to the formerly streamlined classing system. Weight reduction now involves the use of a scale.
Engine swaps and turbocharger kits now involve submitting dyno results to NASA.
There is one major criticism of the NASA classing system:
- In order to find the highest performance level of the car, the participant must test every possible
combination of available modifications which add up to the point limit for a class. Unless the vehicle
is common and being raced by a large number of other participants, there is no source of shared testing
or even opinion. Without that shared group knowledge, the competitor is on their own. Because each
model of car responds differently to any given modification, finding the most potent mix would cost
a fortune. And if the vehicle is not well catered to by a large aftermarket, the competitor is relying
on custom made parts which are even more expensive.
Base classing for the Geo Storm is:
- PTG - Geo Storm Base/SOHC, Weight: 2282 lb.
- PTF - Geo Storm GSi, Weight: 2480 lb.
NASA does not currently have the Isuzu sister cars formally classed. This could be done by contacting
NASA. The Non-turbo Isuzu sister cars would probably be classed similarly to their Geo Storm Base/SOHC
and GSi counterparts, and the Impulse RS AWD likely classed slightly higher.
Check the rule book yourself before making any decisions and consult with
NASA in the event of any questions.
The base classing chart and modification points list is available online as a PDF file on the NASA
website.
The following table is based on the 2013 rule book.
Tires
| Modification |
Points |
DOT approved R compound tires: BFG R1S, Hoosier Wet DOT (if used in dry conditions) |
+15 |
DOT-approved R-compound tires: BFG R1, Goodyear Eagle RS AC (autocross), Hankook Z214 (C90
& C91 compounds only), Hoosier A6 |
+13 |
DOT-approved R-compound tires and those with a UTQG tread wear rating of 40 or less not listed otherwise
in these rules: Maxxis RC-1(examples: Goodyear Eagle RS, Hankook Z214 (C71, C70, C51, C50), Hoosier R6,
Kumho V710, etc. (note: Grand Am Continental Tire Sports Car Challenge tires OK) |
+10 |
DOT-approved R-compound tires: Toyo Proxes RR, Hankook TD |
+10 |
DOT-approved R-compound tires with a UTQG treadwear rating of 50 to 130 (ex. Kumho V700, Michelin Pilot
Sport Cup, Nitto NT01, Pirelli PZero Corsa, Toyo R888, Toyo RA-1, Yokahama A048, etc) |
+7 |
DOT-approved (non-R-compound) tires with a UTQG treadwear rating of 120-200 (examples: Toyo R1R, Dunlop
Direzza Sport Z1 Star Spec, Bridgestone Potenza RE070, Kumho Ecsta XS, Yokohama Advan A046 & Neova AD08,
Hankook R-S3) |
+2 |
Non-DOT-approved racing slicks |
+30 |
Allowed Base Tire Size
| Class |
Width |
PTA |
295 mm
|
PTB |
265 mm |
PTC |
255 mm |
PTD |
245 mm |
PTE |
235 mm |
PTF |
215 mm |
PTG |
195 mm |
PTH |
175 mm |
Change Tire Width
| Modification |
Points |
+120 mm |
+34 |
+110 mm |
+31 |
+100 mm |
+28 |
+90 mm |
+25 |
+80 mm |
+22 |
+70 mm |
+19 |
+60 mm |
+16 |
+50 mm |
+13 |
+40 mm |
+10 |
+30 mm |
+7 |
+20 mm |
+4 |
+10 mm |
+1 |
+/-0 mm |
-0- |
-10 mm |
-1 |
-20 mm |
-4 |
-30 mm |
-7 |
-40 mm |
-10 |
-50 mm |
-13 |
-60 mm |
-16 |
-70 mm |
-19 |
-80 mm |
-21 |
-90 mm |
-24 |
-100 mm |
-28 |
-110 mm |
-30 |
-120 mm |
-34 |
Weight Reduction
| Modification |
Points |
-5 lb. |
+1 |
-20 lb. |
+2 |
-35 lb. |
+3 |
-50 lb. |
+4 |
-65 lb. |
+5 |
-80 lb. |
+6 |
-95 lb. |
+7 |
-110 lb. |
+8 |
-125 lb. |
+9 |
-140 lb. |
+10 |
-155 lb. |
+11 |
-170 lb. |
+12 |
-1805 lb. |
+13 |
-200 lb. |
+14 |
-215 lb. |
+15 |
-230 lb. |
+16 |
-245 lb. |
+17 |
-260 lb. |
+18 |
-275 lb. |
+19 |
-290 lb. |
+20 |
-305 lb. |
+21 |
-320 lb. |
+22 |
-335 lb. |
+23 |
-350 lb. |
+24 |
-365 lb. |
+25 |
-380 lb. |
+26 |
-395 lb. |
+27 |
-410 lb. |
+28 |
-425 lb. |
+29 |
-440 lb. |
+30 |
-455 lb. |
+31 |
-470 lb. |
+32 |
-485 lb. |
+33 |
-500 lb. |
+34 |
Plus one additional point for each additional 15 pounds of weight reduction. |
+Etc. |
Instead of assigning points to individual
weight reduction items, NASA assigns points to the number of pounds that the vehicle weight is reduced below
the base weight listed with the vehicle class. For the Geo Storm entries, this appears to be the factory
listed curb weight, which is an advantage because the curb weight is lower than the actual weight of an
operable vehicle.
Engine / Drivetrain
| Modification |
Points |
Engine swap: All engine swaps must be evaluated for new base classification by the National
PT Director on an individual basis. The following factors will be taken into account in classing
the car: wt./hp ratio, total weight, high torque in the usable rpm range, body style, engine
location, drivetrain type, advanced technology/engineering in OEM suspension, brakes, drivetrain,
and aerodynamics, and dry sumps (if engine is lowered). Competitors should submit all of the above
data to the National PT Director by e-mail with the request for re-classification of the vehicle.
Most engine swaps will require chassis dynamometer testing of the competition-ready vehicle and
submittal of the Minimum Competition Weight chosen by the competitor. (see section 5.4) |
+??? |
Increased number of camshafts, non-OEM (non-stock) head(s)/hybrids, port modified rotary engines,
and non-OEM/upgraded/modified
turbo or
superchargers: engine swap rules with Dyno testing apply -—must be evaluated by the National PT
Director for re-classification. (see section 5.4 Dyno Re-classing and Testing Procedures) All OEM
naturally aspirated vehicles that have been upgraded to forced induction and forced induction vehicles
with an upgraded or modified turbo or supercharger must be evaluated by the National PT Director on an
individual basis for new base classification based on chassis dynamometer testing and actual vehicle
weight as in C.1) above and in Section 5.4 Dyno Re-classing. After re-classification, modification
points will not be assessed for weight reduction or engine. However, if the power output of the
vehicle is later increased, the participant will have to get the vehicle re-classified again. |
+??? |
Aftermarket computer system (any non-OEM “stand-alone” or “piggyback”) - Naturally Aspirated |
+3 |
Aftermarket computer system (any non-OEM “stand-alone” or “piggyback”) - Turbocharger/Supercharger |
+10 |
Modification of the OEM air intake/box, air filter location, air piping to the turbo/supercharger/
intercooler/throttle body/carburetor, or
hood/fascia/fender air inlet(s), outlets, or vents |
+1 |
Drop in air filter in OEM aif filter canister/box |
+0 |
Non-OEM, deleted, or modified/ported throttle body |
+2 |
Independent/individual/multiple throttlebodies |
+4 |
Non-OEM or modified carburetor,
fuel rail,
fuel injectors,
fuel pump(s), and/or
fuel pressure regulator (no points for fuel pump alone if using OEM fuel and timing maps, sensor
inputs and ignition timing) |
+2 |
Non-OEM, modified/ported, or deleted intake manifold: 4 cyl. |
+1 |
Water injection system (alcohol-water mixtures are not permitted) |
+6 |
Nitrous oxide injection is not permitted. |
Not Permitted |
Replacement pulleys (other than for supercharger) or non-electrical fan removal |
+1 |
Replacement pulley for OEM supercharger or replacement of any pulley that affects OEM supercharger
speed |
+4 |
Aftermarket boost controller or modification/alteration of OEM vacuum lines that serve to function as
a boost controller |
+4 |
Aftermarket or modified wastegate actuator, wastegate, or vacuum line(s) that serve to control the
wastegate actuator function or increase peak boost |
+3 |
Add aftermarket intercooler |
+7 |
Non-OEM or modified intercooler (Intercooler sprayers are not permitted unless they came on the OEM
base trim model of the vehicle) |
+4 |
Increased displacement by: <1.5% |
+0 |
Increased displacement by: 1.5% to <5.5% |
+4 |
Increased displacement by: 5.5% to <7% |
+6 |
Increased displacement by: 7% to <10% |
+8 |
Increased displacement by: 10% to <15% |
+10 |
Increased displacement by: 15% to <20% |
+15 |
Increased displacement by: > 20% |
+20 |
Modified or non-OEM
camshaft(s), rocker arms, push rods, or
cam timing gears (for one or more) |
+6 |
Valve size change,
modified, ported or polished OEM head (other than simple shaving of the head only) |
+6 |
Any modifications that result in increased engine compression ratio (including shaving the head or decking
the block to factory specs): 0.50 or less |
+0 |
Any modifications that result in increased engine compression ratio (including shaving the head or decking
the block to factory specs): >0.50 |
+3 |
Any modifications that result in increased engine compression ratio (including shaving the head or decking
the block to factory specs): >1.0 |
+6 |
Any modifications that result in increased engine compression ratio (including shaving the head or decking
the block to factory specs): >2.0 |
+10 |
Any modifications that result in increased engine compression ratio (including shaving the head or decking
the block to factory specs): >3.0 |
+15 |
De-stroked engine |
+4 |
Added dry sump oil system |
+7 |
Added dry sump oil system if motor is lowered from OEM location |
+14 |
Modification or porting of the exhaust manifold |
+2 |
Aftermarket or modified header |
+2 |
Non-OEM or modified exhaust piping, resonators, or mufflers downstream from the header, exhaust manifold,
or turbo.(does not include catalytic converter removal/upgrade) |
+2 |
Removal, upgrade, or modification of catalytic converter(s) |
+1 |
Drivetrain
| Modification |
Points |
Non-OEM sequential (semi-automatic) or dog-ring (non-synchromesh) transmission (includes altered gear
ratios)(does not include automatic transmissions utilizing a torque converter) |
+7 |
Double clutch transmissions with altered gear ratios (do not also assess D.3 & D.4) |
+6 |
Upgrade number of forward gears in transmission or altered gear ratios |
+3 |
Added paddle/electronic shift |
+3 |
Added limited slip differential or welded/locked differential |
+3 |
Changed or modified limited slip differential (or welded/locked OEM LSD) |
+1 |
Added traction control (no points if proven disabled during competition) |
+3 |
Relocation of engine/transmission between 1 and 10 inches of the OEM location (note: Relocation of less
than 1 inch is not assessed points. Original engine location shall be based on the OEM rear face of the
engine block and the OEM crankshaft centerline) |
+7 |
Modification/upgrade from a fixed to a floating rear axle |
+3 |
Suspension
| Modification |
Points |
Non-OEM shocks/struts/dampers with an external reservoir or more than two ranges of adjustment—must
still take points for springs below (example: compression (bump) and both high & low rebound
adjustments) |
+10 |
Non-OEM shocks/struts/dampers with a “Piggy Back” external reservoir (fixed reservoir without a connecting
hose) OR with shaft diameter 40mm or greater—must still take additional points for the springs
below |
+7 |
Non-OEM or modified/re-valved shocks/struts/dampers (all others)(springs not included) |
+3 |
Changing the mounting orientation/design of the OEM shock and/or spring perch in order to invert the
shocks/struts (includes non-OEM inverted shocks/struts) |
+1 |
Non-OEM or modified coil springs, leaf springs/spacers/brackets, or torsion bars |
+2 |
Conversion of torsion bar/leaf spring suspension to coil spring and strut/shock suspension |
+2 |
Add, replace, remove, or modify anti-roll bars or end links (“sway” bars—front, rear, or both—may have
spherical joints on the end links and/or relocation of the mounting points without additional
points assessment) |
+2 |
Non-OEM driver/cockpit adjustable sway bar or suspension settings |
+4 |
Replace or modify control arms (other than plates, shims, slots, or eccentric bolts/bushings for simple
camber/caster adjustment only) or RWD/AWD rear trailing arms (may have spherical/metallic joint for the
connection to the spindle/knuckle) |
+4 |
Non-OEM rear control arms on FWD vehicles (for stiffness and wheel alignment only, no change in suspension
mount or pick-up points from stock) (if both front and rear use E.9) |
+1 |
Non-OEM rear trailing arms on FWD vehicles (for stiffness only, no change in suspension mount or pick-up
points from stock) |
+1 |
Using the alternate control arm mounting location on cars equipped OEM with multiple choices (example:
to increase track width) |
+6 |
Replaced or modified K-members that change the location of the lower control arms |
+8 |
Tubular K(cross)-members that do not change the location of the lower control arms |
+2 |
Relocation of front suspension mounting points |
+6 |
Relocation of rear suspension mounting points |
+6 |
Bump steer kits or shimming of the steering rack |
+2 |
Alteration of ball joints/dive angles |
+2 |
Add panhard rod or Watts link (regardless of whether or not the Watts link replaces an OEM panhard rod or
the panhard rod replaces an OEM Watts link) (may have spherical joints without an additional points
assessment) |
+4 |
Replace or modify an OEM panhard rod or Watts link (may have spherical joints without an additional points
assessment) |
+2 |
Add torque arm (may have spherical joints without an additional points assessment) |
+4 |
Replace or modify an OEM torque arm (may have spherical joints without an additional points assessment) |
+2 |
Metallic and/or spherical-design replacement suspension bushings (except for pillow ball camber plate
joints, sway bar end links already assessed points in 7) above, control arm spindle/knuckle joints already
assessed points in 9) above, and panhard rod or Watts links already assessed in 20) or 21) above.) |
+3 |
Brakes/Chassis
| Modification |
Points |
Non-OEM, modified, or relocated brake calipers and/or brake caliper brackets and/or brake rotor
diameter |
+2 |
Add front lower stress/arm brace (two attachment points maximum) |
+1 |
Add a third or fourth attachment point to a front or rear strut tower bar (or replace an existing/OEM
three point bar) (Additional attachment points must not be tied to any other type of mounting point
with anything other than sheet metal) |
+1 |
Add or modify other chassis stiffening devices or fabricated parts (such as
lower strut braces or lower arm braces
(with greater than two attachment points), subframe connectors, subframe braces, subframe
mounts/bushings, etc.) |
+3 |
Increase in track width greater than four (4) inches due to non-OEM axles, control arms, brake rotors/hats,
wheel spacers, hubs, wheel offset, and/or camber adjustment (measured from the inside of one tire to the
outside of the opposite tire at ground level—-averaging the measurements in front of and behind the contact
patch to negate the effect of toe) |
+6 |
Aerodynamics
| Modification |
Points |
Add, replace, or modify front fascia and/or
air dam (except as provided for in I.c.3), I.f.3),
I.h.14) of the No-Points Modification list) The
air dam must be vertical and must not protrude
from the side of the vehicle or it will be assessed additional points for G.2 below. Additional
points must be assessed below for any component of the added/replaced/modified fascia or air dam
that performs the functions listed in G.2) and G.4) below |
+3 |
Add, replace or modify a single front
splitter/spoiler/wing/foil This part may extend horizontally
past the side of the vehicle no greater than five inches. If any portion of this part that protrudes
from the side of vehicle is not parallel to the ground, then additional points must be assessed for
canards in G.4) below. No material or part may extend the vertical reach of the OEM front fascia
without taking fascia modification points above (G.1). An added spoiler, wing, or foil must originate
no higher than 3 inches above the bottom edge of the OEM front fascia or additional points must be
assessed above for G.1) |
+3 |
Add, replace, or modify
rear wing and/or
spoiler
(a rear wing or spoiler may not exceed a height of eight (8) inches above the roofline (or OEM
windshield height for convertibles), or a width greater than the width of the car body. (note:
additional points must be assessed for end plates that are greater than twelve inches in height
---G.8) below) |
+4 |
Add or modify
canards/winglets (includes portions of an added/modified/replaced fascia that provide
a downward force other than that listed in G.2) above) |
+2 |
Add or fabricate flat bottom/
belly tray (rearward of the centerline of the front axle) |
+5 |
Add
rear diffuser (note: additional points must be assessed for any vertical panels incorporated
into a rear diffuser that are greater than five inches in height ---G.8) below) |
+2 |
Replace or modify OEM
rear diffuser,
rear bumper cover, or rear “fascia” (note: additional points
must be assessed for any vertical panels incorporated into a rear diffuser that are greater than
five inches in height ---G.8) below) |
+1 |
Add rear vertical panels in any location (note: see G.3), G.6), G.7), and G.10)) |
+2 |
Add or modify side skirts (side skirts must be vertical or an OEM option only, and cannot connect
to any other aero component) |
+2 |
Add vortex generator to roof, rear window, or rear deck lid (note: additional points must be assessed
for any vertical panels incorporated into a vortex generator that are greater than five inches in
height ---G.8) above) |
+1 |
Removal of the front windshield/windshield frame (raking is not permitted) |
+7 |
Front side window frame air dams/diverters (driver and/or passenger side) |
+2 |
Add a non-OEM hardtop to a convertible that is not the identical shape and size of either the OEM
or OEM option hardtop for that car model (note: The top must not extend rearward of the front edge
of the rear deck lid.)(“Fastback” tops and toneau covers are not permitted.) |
+5 |
Active aerodynamic modifications (including, but not limited to, computerized, cockpit adjustable,
self-adjusting, etc.) |
Not Permitted |
Roll Cages
| Modification |
Points |
6-point (two main hoop, two rear brace, two forward hoop) roll cage designs constructed per the NASA
CCR may be utilized without a PT modification point assessment. Two additional attachment points for
either two foot-well bars or two bars to the front firewall (one on each side) may be added without a
PT modification point assessment. Additional bars and/or gusseting within the structure of the cage
are permitted without a PT modification point assessment. Gusseting of the 6 (CCR) attachment points
listed above is permitted without a PT modification point assessment provided that the gussets are
attached to the tube no further than six (6) inches from the end of the tube, and to the chassis no
further than six (6) inches from the end of the tube where it terminates at the plate. Up to three
additional attachment points solely for the purpose of bars connecting “NASCAR” style driver side door
bars to the rocker panel are permitted without a PT modification point assessment. Additional attachment
points within the driver’s compartment that exceed these allowances are also permitted, but will be
assessed points as follows: |
Required |
One or more bars that penetrate the front bulkhead/firewall |
+2 |
Any other attachment point to the chassis |
+2 |
No-Points Modifications - Tires
| Modification |
Points |
Tire pressure monitoring systems (TPMS) (Pressure release valves are not permitted.) |
+0 |
No-Points Modifications - Weight Reduction
| Modification |
Points |
Sun/moonroof removal and cover roof hole. |
+0 |
Battery replacement/lightweight battery/dry cell |
+0 |
Air bag removal (must be removed or disabled) |
+0 |
Floor mat removal (required) |
+0 |
OEM jack and spare tire removal, pneumatic/air jack(s) addition |
+0 |
OEM air conditioner system removal with or without A.C. delete pulley--no point assessment for
C.10) |
+0 |
Lexan windshield, rear window, and rear passenger side windows (windshield must be 3/16” minimum
thickness). (See section 7 Safety regarding front side windows) No uncovered holes are permitted in
rear windows. Holes covered with tape or other non-porous material preventing air movement are
permitted. Rear window removal without replacement is not permitted. |
+0 |
Front wing window/frame removal and replacement with Lexan |
+0 |
No-Points Modifications - Engine
| Modification |
Points |
Fuel: Any grade of commercially available unmodified gasoline or diesel --all octane levels of
retail available race gas are permitted. No “home brewed” methanol/ethanol/alcohol mixtures are
permitted. Methanol injection systems are illegal. Fuel additives are prohibited.
Retail available E-85 is permitted. |
+0 |
Air filter upgrade (without modification of the air filter housing or air intake system) |
+0 |
Radiator upgrade/shrouding/fascia modification (drilled or cut holes/slots) that only provides increased
airflow to the radiator or oil/transmission coolers (without aerodynamic or engine air intake
improvement) |
+0 |
Starter motor replacement |
+0 |
Alternator replacement and/or relocation |
+0 |
Spark plug wires,
plugs,
coil,
ignition replacement/upgrade |
+0 |
OEM ECU/PCM reprogramming via reflashing or replacement/aftermarket ROM chips or simple ROM boards (the
OEM ECU/PCM box/housing and hardware must be used) |
+0 |
SAFC or VAFC (Super Air Flow Converter/VTEC Control Air Flow Converter) |
+0 |
Non- OEM sensors or alteration of sensor inputs (such as non-programmable MAF or MAP voltage
“clamps”) |
+0 |
Ignition timing adjustments |
+0 |
Drive by wire to cable throttle conversion (throttle body must remain identical to OEM in both size and shape
to avoid a +2 throttle body assessment) |
+0 |
Oil systems and
coolers other than added dry sump |
+0 |
Oil catch tanks/cans |
+0 |
Valve cover replacement or modification |
+0 |
Carburetor jetting modification |
+0 |
Carburetor vacuum port blocking |
+0 |
The addition of a second fuel pump inside an OEM fuel tank, serving only as a transfer pump to help
prevent fuel starvation, that is not connected to the fuel line providing fuel to the engine in any way,
and does not increase the maximum fuel flow or pressure provided by the OEM fuel pump |
+0 |
Engine rebuild with head shave, block decking and 0.020” overbore—provided that compression ratio is
not increased by more than 0.5 and displacement is not increased by greater than 1.49%.
Forged pistons
and internals are legal; however, points must be assessed for de-stroking, and/or increased displacement
and compression ratio if greater than the limits listed above. (Note: 0.020” overbore with OEM rods and
overbore pistons will yield an increase in displacement of approximately 1.1% for most engines.) |
+0 |
Engine balancing and blueprinting |
+0 |
Removal of the engine balance shaft and/or balance shaft drive mechanism |
+0 |
Non-OEM valve springs and retainers |
+0 |
Turbo blow-off valve upgrade, modification, or addition |
+0 |
Header and exhaust piping external wrapping, coatings, and/or paint. (The original OEM
identification markings must still be legible on all exhaust components that are not assessed
points.) |
+0 |
EGR, smog pump, charcoal canister and associated vacuum line and hose removal |
+0 |
Cryogenic treatment of engine components |
+0 |
Removal of OEM coolant hoses to the throttle body |
+0 |
No-Points Modifications - Drivetrain
| Modification |
Points |
Wheels, wheel studs, wheel bearings replacement/upgrade, hub modification/replacement, axle modification or
replacement (unless otherwise assessed points above).
Spindles/steering knuckles may be modified or replaced as a No-Points modification to allow for hub size
change provided that there are no changes in suspension geometry or mounting point locations (such as tie
rod connection height, ball joint connection location/height, etc.) |
+0 |
Modification/upgrade/replacement of
flywheel or torque converter with any lightened or non-OEM part
(note: balancing/resurfacing a stock flywheel is still +1) |
+0 |
Motor, transmission, and differential mounts and inserts/bushings, replacement/upgrade or modification
(with up to 1 inch of relocation of the motor/transmission) |
+0 |
Final drive ratio modification |
+0 |
Cryogenic treatment of transmission and differential components |
+0 |
Transmission and Differential coolers |
+0 |
No-Points Modifications - Suspension
| Modification |
Points |
Simple camber, caster, and toe adjustment by any method that does not alter suspension mounting points
(unless the modification used is otherwise assessed points above) - such as control arm, ball joint, and
relocated mounting point modifications). Slotting of the OEM bolt holes and removal of material from the
top surface of the OEM strut/shock tower to the extent necessary to allow simple camber/caster adjustment
is permitted.
Bolt on camber/caster plates are not assessed points. |
+0 |
Ride height adjustment (must still take points for springs and torsion bars above) |
+0 |
Non-metallic replacement suspension bushings |
+0 |
Shock mount replacement/modification (only if already taking points for both shocks and springs)(may raise
or lower mount location up to two (2) inches if no horizontal movement.) |
+0 |
No-Points Modifications - Brakes/Chassis
| Modification |
Points |
Non OEM brake pads and rotors |
+0 |
Brake lines, boosters,
proportioning valves, and master cylinder modification or replacement |
+0 |
Brake duct addition or modification,
including electric fans (water sprayers are illegal). Two holes
may be cut or drilled out of the front fascia for brake air ducts. Any hole providing improved intake air
to the engine will be assessed one (1) point. |
+0 |
ABS (anti-lock braking system)--Only OEM systems offered specifically for the car Model as a factory
option. No OEM systems offered for a different car model or aftermarket systems are permitted |
+0 |
Emergency brake removal |
+0 |
Maximum of two hundred and fifty (250) lbs. of added ballast—All ballast must be of solid material (no
fluids or shot pellets) and safely secured in any location on the vehicle approved by NASA technical
inspectors. The preferred method is to use at least one (1) 3/8-inch grade- 5 bolt, two (2) “fender”
washers and a locking nut system for every fifteen (15) pounds of weight. |
+0 |
Seam or stitch welding of the body/chassis |
+0 |
Add front strut tower bar (two attachment points—bolted in or as component of the cage) |
+0 |
Add rear strut tower bar (two attachment points—bolted in or as a component of the cage) |
+0 |
No-Points Modifications -Aerodynamics
| Modification |
Points |
Undertray/ belly pan forward of the centerline of the front axle |
+0 |
No aero points for removal of convertible soft top/frame and/or adding a hardtop to a convertible provided
that the hardtop must be either a OEM option, or OEM option shape and size only, and must use a sealed
rear window. (i.e., lightweight ok, but no tops with non-OEM aero features) |
+0 |
No-Points Modifications - Body
| Modification |
Points |
Rolled fender lips |
+0 |
Flared fenders (Alteration of the inner aspect of fender wells is not permitted, i.e. “tubbing”) |
+0 |
Steering wheel replacement |
+0 |
Mirror addition, removal, or replacement |
+0 |
Gear shifters and shift knob replacement/upgrade |
+0 |
Seat harnessess (must be compliant with NASA CCR) |
Required |
Non-OEM driver’s seat |
+0 |
Non-OEM front passenger seat |
+0 |
Relocated battery |
+0 |
Accelerator, brake, and clutch pedal modification or replacement |
+0 |
Steering rack replacement or modification (without geometry change unless taking points for
E.18). Rack ratio change is permitted. Change from OEM power steering to manual, and/or modification
of the power steering pump requires the point assessment for engine pulley in C.10) |
+0 |
NACA ducts, air ducts, or air hoses placed in a side window frame solely for purposes of driver
cooling |
+0 |
Headlamps, headlight covers, and fog lights may all be removed, and the holes may be covered with
material that replicates the shape of the OEM light/cover, leaving the shape of the OEM fascia intact.
Uncovered holes may be used for brake ducts. Any hole providing improved intake air to the engine will
be assessed one (1) point under C.4). |
+0 |
Removal of the spare tire floor section of the rear hatch space for the purpose of placement of a fuel
cell (only) |
+0 |
The transmission tunnel may be modified for the purpose of installing a competition driver seat. The floor
pan must remain in its original position. |
+0 |
Data acquisition systems --telemetry is not permitted (NASA CCR section 18.7) |
+0 |
Dashboard modification, removal, and/or replacement |
+0 |
Hood pin addition or replacement, including “Aero” type hood pins |
+0 |
Safety
| Modification |
Points |
Roll cages may be built to provide additional chassis stiffening, including tubes that penetrate the
firewall. However, additional tubes and attachment points will be assessed modification points as
stated in 5.3.H Roll Cages |
Required |
An electrical master cut-off switch is required |
Required |
Steering wheel lock removal is recommended, but not required |
Required |
An approved suitable racing seat is required |
Required |
Air bags must be disabled or removed |
Required |
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