Nissan 240SX Classification

[josephkelley77]

For all my 240 Brothers that need a little help classing their cars maybe this will help. Its the same for S13 and S14 models unless stated other wise.

Stock Class Mods: We fall in the G Class = GS
- Gauges and Warning Indicators (Tach, Boost, Shift Light, Turbo Timers, etc.)
- Lighting Improvements (HID's, LED's, etc.)
- Broadway/Clip-on Mirrors (No Removal of OEM Mirror)
- Data Logging Equipment (Camera's, Sensors, etc.)
- Hood Pins (Aerocatch, Sparco, etc.)
- Any Fuel Cap
- Stock Steering Wheels (Must Retain Air Bag i.e. Stock S15, GT-R Wheel)
- Spare, Jack & Tools may be Removed (Also anything that cannot be held in place i.e. Cover board & Carpet)
- Roll Bars & Roll Cages: Bolt-In Only (Recommended but not Required)
- Harness & Harness Bars (Stock Restraints may not be Removed)
- Any DOT Approved Tire (Tread rating: 140 Minimum, No Slicks )
- Max Tire Width Allowed by OEM Rim Size (225/50 on a 16x6.5)
- Any wheel = Stock Size with +/-.25" of OEM Offset (16x6.5+40 = Stock S14 SE, .25" = 6.35mm)
- Ext. Studs & Lugs Allowed
- Spacers Allowed (Must be +/- .25"/6.35mm of OEM Offset)
- Any OEM Type Strut Allowed (AGX's, D-Specs, HTS's, Yellow's, etc.)
- Any OEM Type Spring Allowed
- Pillow Top Mounts Allowed (Tein Rear Top Hats)
- Bump Stops can be Trimmed but not Extended
- Any Brake Pad Lining
- Blank Rotors Only
- SS Braided Clutch & Brake Lines (1992 and Older Only)
- Speed Bleeders Allowed
- Any Front Sway Bar (Poly Bushings Allowed, Spherical Ends Allowed)
- OEM Rear Sway Bar Only (OEM Rubber Type Bushings, OEM Type End Links)
- Factory Camber/Adjustment Bolts Only (Front Camber Bolts Allowed)
- Rubber Type Suspension Bushings Only (Poly, Aluminum, Derlin not Allowed - Nismo = Hard Rubber)
- Any Spark Plug allowed (E3's, Puls Plugs, etc.)
- Any Plug Wires Allowed
- Any External Coil Allowed (S13's Only)
- Stock ECU Only
- Panel Filters Only (May be Removed)
- Pistons can be .020" (.5mm) Over Stock MAX (OEM Type: Cast)
- No Engine Balancing
- No Port Matching
- Any Cat-Back (100dBA MAX - Sound Measurment)
- Stock Type CAT's Only (S14 Secondary CAT is HOLLOW!)
- Any Oil Filter
- Synthetic Fluids Allowed
- Water Expansion Tanks Allowed
- Oil Catch Cans Allowed (PVC System may not be Altered from OEM Configuration)
- Any Thermostat
- Silicone Hoses Allowed
- Stock Open Diff (VLSD in SE/Package Models Only)
- Stock Trans & FD Only
- Stock Type Clutch Only (Exedy, OEM, etc.)
- ABS May be Disabled but not Removed




Street Touring Class Mods: ST
- All Stock Class Allowances
- Pedal Kits Allowed (AutoVation, Pilot, etc.)
- Driver Seats May be Replaced (25lbs Minimum - Stock = ~36lbs)
- Emblems & Mud Flaps may be removed
- Stock Class Steering Wheel Rules
- Fender Lip may be Rolled Only (Splash Guards may be Trimmed)
- Body Kits, Spoilers, Wings & Splitters Allowed (Splitter & Spoiler/Wing = 5sq. Ft. Max Total)
- OEM Spoiler may be Removed
- Strut Braces Allowed (Strut Bars, Tie-Rod Braces, Rear Lower Tie-Brace, etc.)
- Tire Width 225mm Maximum
- Any Wheel Diameter
- Wheel Width 7.5" Max
- Any Offset
- Coilovers Allowed
- Cross Drilled & Slotted Rotors Allowed
- SS Braided Lines Allowed on ALL Model Years (DOT Approved)
- Brake Ducts Allowed
- Any Sway Bar Mod (Links, Bushings, Location, etc.)
- Poly Bushings Allowed (No Metal i.e. Aluminum) - Possible use of Derlin?
- Adjustable Camber Plates Allowed
- Any Trans Mounts Allowed (No Metal i.e. Aluminum)
- Steering Rack Bushings Allowed (No Metal i.e. Aluminum)
- Adjustable Suspension Arms Allowed (SPC Only, no Spherical Bushings Allowed = Metal)
- Z32/Q45 Rear Aluminum Uprights Allowed (IIRC)
- 1/2 Size Battery Allowed
- Battery Relocation Allowed (In Trunk Only)
- Baffled Oil Pans Allowed
- Any Intake Modification Allowed up to Throttle Body (Must Retain OEM MAF, PCV Inlet/Outlet, IAT, etc.)
- Emission Legal Header/Manifolds Allowed (S13's = Full Headers | S14's = Manifold Only - Must Have EGR Port)
- Relocating o2 Sensor Allowed
- Hi-Flow CAT Allowed (S14 Primary CAT is in Down Pipe - Custom DP w/ MagnaFlow CAT Only Allowed - MagnaFlow CAT meets all Requirements)
- OEM Type CAT (Three-Way, Air Injection, etc.)
- Programmable ECU Allowed (Modified Stock ECU Only i.e. Clumnsult, Nistune, TechnoSquare, etc.)
- Piggy-Back Tuners Allowed
- Adjustable FPR Allowed (Stock Injectors & Pump Only)
- Any Timing Adjustment Allowed from Factory
- Must Meet EPA Tailpipe Emissions
- Short Shifters Allowed
- Underdrive & Lightweight Pulley's Allowed
- Any Engine Mounts Allowed (No Metal/Solid Mounts i.e. Aluminum or Derlin)
- Engine Dampers Allowed
- VLSD Allowed in All Models




Street Touring Class X Mods: These mods put you in X Class = STX
- All Street Touring Class Allowances
- Tire Width up to 265mm
- Wheel Width up to 9"
- Any Brake Upgrade Allowed (Q45, Z32, GTR, Brembo, etc.)
- Multiple CAT's may be Replaced by a Single Unit (Must be within 6" of Stock Primary CAT Location)
- Any LSD Allowed (1.5way, 2way, Clutch, HLSD, etc.)




Street Prepared Mods: We fall in the D Class = DSP
- All Stock Category Allowances
- Updating/Backdating Allowed (S14 OBD-2 IM, S13 240/248 Cams, S14 43cc Head, etc.)
- EMS ECU Allowed
- A/C System may be Removed
- Fender maybe Rolled & Pulled
- Emblems & Mud Flaps may be removed
- Strut Braces Allowed (Strut Bars, Tie-Rod Braces, Rear Lower Tie-Brace, etc.)
- Poly Sub-Frame Bushings Allowed (No Metal i.e. Aluminum)
- Longitudinal Sub-Frame Braces Allowed
- Any Seat Allowed
- OEM Seat Belts may be Removed
- Any Steering Wheel Allowed
- Air Bags may be Disabled but not Removed
- Front Splitters & Spoilers Allowed
- Front Splitters may not Protrude Past the Front of the Bumper or Front of the Wheel Well
- Spoiler must not be no more then the following from the Bodywork (Coupe = 10" | Fastback = 4")
- Spoiler End Plates not Allowed
- Angle of Attack is Free
- Roll Bars or Cages may be Welded in (No more then 8pts)
- Fuel Cells Allowed (Must be +/- 20% of Stock Tank Size, Location must be within 6" of Stock Tank)
- Pedal Kits Allowed
- Audio Components may be Removed (Excluding Wiring)
- Sun-Roof may be Removed/Replaced to Solid Roof
- Any Wheel Diameter, Width or Offset
- Any Tire Width that fits Wheel Width
- All Brake Upgrades Allowed (Calipers, Rotors, Ducts, etc.)
- Any Sway Bar Mod (Links, Bushings, Location, etc.)
- Coilovers Allowed
- Poly Bushings Allowed (No Metal i.e. Aluminum) - Possible use of Derlin?
- Diff Bushings Allowed (No Metal i.e. Aluminum)
- Steering Rack Bushings Allowed (No Metal i.e. Aluminum)
- Any Battery Size Allowed
- Alternator Upgrades Allowed
- Oil Cooler Allowed
- Any Fuel Filter
- Dry Sump Allowed
- Any Intake Modification (Intake Manifold, Throttle Body, etc.)
- Velocity Stacks Allowed
- Emissions Devices may be Removed (PCV, EGR, etc.)
- Fuel Line Size 1/2" Max Allowed
- Any Fuel Pump
- Any Exhaust Modification (Must Exit behind Driver)
- Any Engine Mounts Allowed (No Metal/Solid Mounts i.e. Aluminum or Derlin)
- Engine Dampers Allowed
- Aluminum Radiators Allowed
- e-Fans Allowed (Clutch Fan may be Removed)
- Any Trans Mounts Allowed (No Metal i.e. Aluminum)
- Any Clutch or Flywheel Allowed
- Any MC & Slave Allowed
- SS Braided Lines Allowed
- Short Shifters Allowed
- Any LSD Allowed (1.5way, 2way, Clutch, HLSD, etc.)
- Pistons can be .040" (1mm) Over Stock, .0472" MAX (Forged Allowed, Any C/R, Must be = or Greater then Stock Piston Weight: 375g)
- Internal Balancing Allowed
- Port Matching Allowed
- Head may be Milled .010" Max
- Underdrive & Lightweight Pulley's Allowed
- Cam Gears Allowed (Stock Cams Only)

[bronxbomber252]

I havent compared this to the rule book but per my recollection all but 1 thing are correct.

In stock class its ANY DOT tire... there is no treadware limit. the 140 limit is ST classes only... You may run DOT approved Slicks such as the Hoosier A6 (40 tw) and Kumho V710 (60 tw)... at the national level you have 2 basic tire choices: A) Hoosier A6, or B) lose by a lot...

at the local level here in Wiregrass, id recommend the Kumho V710 since its 90% as good as the Hoosier A6 and a LOT cheaper... or any of the popular ST tires (Dunlop Star Spec, Hankook RS3, Toyo R1R, Kumho XS, etc...) if you are less serious.

[matt]

I don't fit into any of those classes.

[jessew]

you know you are in the sadomasochist (SM) class matt!

[matt]

lol... as are you.

[jessew]

yes, we constantly torture our wallets and ride quality to derive some sort of personal driving pleasure and gratification that most people will never understand...

[matt]

I enjoy buying tires every 3000 miles.