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The following is a (hopefully) comprehensive list of modifications that can be perceived to affect AX performance. There are many ways to express these. For example, the UTQG Tread Wear rating can be controlled by specifying one of more thresholds (such as 100) and handicapping cars that fall under these thresholds. Or a formula can be used to assign points based on the value of the Tread Wear rating. We probably won't need all these, but remember it's necessary to list "free" mods too! Some of these are redundant, because not everybody agrees on the wording. We should select only one variation and thus in the final list, there should be no redundant entries. Please send corrections and additions to me. In the future, we need to assign a handicap to each of the mods in the final list. |
| Autocross Modifications List |
| 1/31/03 |
| Tires and Wheels |
| Wider Rims |
| Wheel Diameter |
| Tire Diameter |
| Tire Section Width |
| Tire Series (aspect ratio) |
| The UTQG Tread Wear Rating |
| Non-DOT Tires |
| Increased Track |
| Wheel Spacers |
| Wheels and Tires That Extend Beyond Original Fender |
| Weight |
| Weight Below Stock or Specified |
| Lightening, per Pound |
| Removing Body Panels |
| Substituting of Body Panels |
| Removing Parts |
| Substituting Seat |
| Gutting Interior |
| Lighter Windows |
| Removing Windows |
| Removing Jack, Spare Tire, Trunk Carpeting, Tools, etc. |
| Removing AC System |
| Removing Electric Window Mechanisms |
| Removing Radio and Sound System |
| Non-Stock Battery |
| Non-Stock Fuel Tank |
| Engine |
| Swapping Engines |
| Increasing Displacement |
| Increasing Bore |
| Increasing Compression Ratio |
| Non-Stock Heads (ie, polishing, porting, etc) |
| Non-stock Camshaft |
| Non-Stock Cam Timing |
| Non-Stock Fuel System (ie, carbs, FI, etc) |
| Programmable Fuel Injection |
| Modified Velocity Stacks |
| Modified Venturi |
| Non-Stock Forced Induction |
| Added Turbocharger or Supercharger |
| Variable Boost |
| Increased Boost |
| Non-Stock Intercooler or Downpipe |
| Nitrous Injection |
| Non-Pump Fuel (ie, aviation fuel) |
| Open Exhaust |
| Non-Stock Headers |
| Non-Stock Mufler |
| Non-Stock Valves |
| Non-Stock Ports |
| Non-Stock Distributor |
| Non-Stock EFI Chips |
| Non-Stock Pulleys |
| Lightening Internal Engine Parts |
| Balancing Internal Engine Parts |
| Disconnecting Drive Belts (for alternator, PS, etc) |
| Non-Stock Internal Parts, Not Listed |
| Added or Changed Engine Cooling (oil, water, or air) |
| Drivetrain |
| Modified Shift Mechanisms (ie, short-shift kits, etc) |
| Lightweight Flywheel |
| Non-Stock Clutch Components |
| Non-Stock Ring and Pinion |
| Non-Stock Gears |
| Added Limited Slip Differential |
| Non-Stock Limited Slip Differential |
| Added Transmission Cooling |
| Suspension |
| Non-Stock Shocks |
| Adjustable Shocks |
| Non-Stock Springs |
| Adjustable Spring Perches |
| Full Coilover Suspension |
| Non-Stock Shock Tower Stiffening Device |
| Non-Stock Anti-Sway Bars |
| Non-Stock Suspension Locating Devices (camber plates, etc) |
| Relocated Suspension Mounting Points (not by adjusting) |
| Non-Stock Suspension Bushings |
| Chassis |
| Chassis Stiffening |
| Roll Bar |
| Roll Cage |
| Tube Frame |
| Body |
| Modified fenders |
| Non-Stock Aerodynamic Aid |
| Non-Stock Paint (ie, "speed yellow"!) |
| Brakes |
| Non-Stock Brake Fluid |
| Non-Stock Brake Pads |
| Non-Stock Brake Lines |
| Non-Stock Master Cylinder |
| Non-Stock Brake Calipers |
| Non-Stock Brake Disks or Drums |
| Added, Modified, or Removed Brake Proportioning Valve |
| Added Brake Cooling |