2015 235 Limited Rules

Class Description

235 Limited is a heads-up 1/8th mile class for any and all types of Rear Wheel Driven Vehicles from Classic 50’s Iron, 60’s Muscle Cars to Late Models Hot Rods & Trucks. This class is going to feauture limitations in Cubic Inch Displacement, Power Adders and all cars will have to use a Small Rear Radial Tire (235 M/T Drag Radial) 
235 Limited will run on a 1/8 mile format with a “All-Run” field.

BODY / INTERIOR
BODY:
The car must retain its original appearance, materials and profiles. Aftermarket Fiberglass or Carbon Fiber Body Parts limited to Hood, Deck-lid and Bumpers only. Rear Mini-Tubs or altering of factory wheel tubs are permitted however no full size wheel tubs will be allowed.

FIREWALL:
Must retain factory unaltered firewall, in original location. A cosmetic overlay is permitted.

FLOORBOARD:
Must retain the factory Floorboard from Firewall to beginning of Trunk/Hatch area… Trunk/Hatch/Spare Tire area can be modified/flattened for battery placement, Fuel Cell etc..

GRILL / FRONT BUMPER:
Factory Grille and Front Bumper must be of original design with no alterations to allow additional Air-Inlets

HOOD:
No Forward-Facing Hood Scoops or Air-inlets for Blower/Turbo Cars

INTERIOR:
Factory appearing door panels, carpet and dashboard are required. Back seat may be deleted, but must have carpet covering the bare floor.

LETTERING / DECALS:
Limited 235 Class sponsor decal (??) must be placed in the lower passenger corner of the front windshield PSCA Series Sponsor decal (Chassisworks) must be placed in the lower passenger corner of the front windshield. PSCA Oval Decal are required on both left and right side of the car/truck in a visible area. Front upper windshield cannot have another racing organization banner or decal (these must be removed or covered in black tape prior to qualifying.)

SEAT & SEAT LOCATION:
Two front full-size bucket seats, or one bench seat with upholstery required. Seats must remain in the factory location without. Nitrous Bottle, Ignition box or any other device cannot be mounted within the passenger side seat.

WINDOWS:
Must be factory OEM Glass, no Lexan permitted…. 1 exception, rear window on a truck if the roll-cage goes into the bed area

CHASSIS / SUSPENSION

FRAME & CHASSIS
Stock frame rails must be retained in stock locations front and rear, Notching of rear frame rails is allowed (No Full Back Half Chassis Permitted) Sub frame connectors are permitted.

FRONT SUSPENSION
All cars must retain stock-type front suspension. Aftermarket Tubular Control Arms, K-Member & Coil Over kits are legal but must completely be a bolt-on conversion.  Bolt-On Firewall forward are not legal unless noted below**. Replacement Bolt-on Lightweight K-Members are legal, but must be a direct bolt on, no welding modifications permitted. Stock wheelbase will be enforced on all vehicles.

**The only front suspension firewall forward bolt-on kits deemed legal by the PSCA are the CHRIS ALSTON No Fab (Mild Steel/A-Arm version only) / Figment Design & Chassis Gen II Mild Steel Front Clip / *FATMAN bolt-on kits (for 62-67 Nova’s, 67-69 Camaro’s & early Mustangs)  / The Rod & Custom Motorsport Mustang II kit for 64 1/2-66 Mustang,  These kits must be installed as instructed and not modified in any manner. If you have a mild steel constructed bolt-on kit not on this list and want to see if it could be added, email us at pscamobile@gmail.com and include, manufacturer & part number

REAR SUSPENSION
After-Market Control Arms, Bushings, Shocks, Leaf Springs, Torque Arm & Coil Springs are OK to upgrade as long as all Factory/OEM Suspension Attaching Points are utilized in the way they came from the vehicle manufacturer with the following exception: On Mini-Tub or vehicles with Leaf springs moved inward, Shocks must still follow the same angle and placement as factory equipped (so if the bottom bracket is moved in 2″ the top must do the same)

No Ladder Bar Rear Type Suspension, No Wheelie Bars, No Off-set Coil Spring Kits, No Coil-Over Shock/Spring Conversion permitted.

WHEEL BASE:
Must retain stock wheel base with a maximum variation right to left and front to back of one inch.

WHEELIE BARS:
Wheelie bars are strictly prohibited.

DRIVE TRAIN

AUTOMATIC TRANSMISSIONS:
Any OEM automatic transmission permitted. Aftermarket torque converter, shift kit, valve body, shifter, and pan cooler use are permitted. Trans brakes are permitted.

MANUAL TRANSMISSION:
After-market Standard Manual Transmissions are allowed except for Clutchless-Types, Clutch/Automatics or Planetary Transmissions.  All shifts must be made manually without the aid of electric, hydraulic or pneumatic devices.

ENGINE / ELECTRICAL

BRACKET RACING AIDS:
The use of bracket racing aids such as optical sensors, delay boxes, and throttle stops are prohibited

ENGINE:
515ci Limit for Power Adder Big Blocks – 525ci Limit for NA Big Blocks – 434ci Limit for Nitrous and NA Small Blocks – 410ci for Boosted Small Block (See Weight Breaks)

ENGINE BLOCK:
Aftermarket Cast Iron are allowed. (No After-Market Aluminum or Billet Blocks permitted)

ENGINE MOUNT LOCATION:
Engine must remain in factory stock OEM location. Engine may not touch the factory unaltered firewall. Motor plates are permitted.

OILING SYSTEM:
No Restrictions. The front cross member may be altered for oil pan removal. Vacuum pumps are acceptable.

STREET LEGAL REQUIREMENTS:
All cars are required to have Left & Right working headlights and tail lights 

TRACTION CONTROL:
Strictly Prohibited… Vehicle is limited to the use of a single drive-line sensor that is capable of measuring RPM and/or Wheel Speed. Sensor wiring must be clearly identified and easily traceable from sensor connection to Data Acquisition system.  Sensor cannot be spliced or have any jumpers installed under any circumstances.  RPM sensor CANNOT be routed into any Engine Management/Timing Management system, be it via direct or indirect connection.  Driveline will be checked in Tech and Random checks will be made during race weekends… If you are caught violating these rules, Car & Driver will be suspended from all PSCA Events (Including Street Car Super Nationals Vegas & St Louis) for the period of 13-Months.  In addition a Donation of $1,000.00 must be made to a PSCA Charity (St Judes Children Hospital) before Car & Driver are Re-instated.

INDUCTION – EXHAUST

CARB:
Any 4150 Based of Conventional design 4-Barrel is Max permitted (no 4500 Series/Dominators allowed on a power adder combo)

EFI:
Any EFI system is permitted but throttle body is limited to 92mm or a 4150 Series 4-Barrel

FUEL:
Gasoline (Race Gas) and E-85 are the only legal fuels permitted.

HEADS:
Aftermarket cylinder heads, cast aluminum or cast iron are allowed however are limited to the following:

Add 0 lbs. Any OEM Factory Cast Iron Heads
Small Block Ford: Trick Flow TFS 52410003-M61 / Edelbrock Performer Series & Victor Jr. # 77189 & 77199 / AFR 165, 185, 195 Series / World Products 180cc Windsor Jr / Ford Racing M-6049-Z304D
Small Block Chevy: AFR 180, 190, 195, 210, 220, 227 Series / Edelbrock Victor Jr 77589 / TEA SBC220-CUSTOM
Big Block Chevy: Brodix BB-2 X, BB-2 XTRA & BB-3 Series / Dart Pro-1-310, 325, 335 & 345 #’s 19100000, 19200000, 19300000 & 19474030

Add 50 lbs.
Small Block Ford: Trick Flow TFS-51910002-M44, TFS-51700001 / AFR 205 Series / Speedmaster PC3061 /  
Small Block Chevy: Dart Pro-1 230 Series #’s11710040P, 11711143P, 11720040P, 11721143P, 11810040P, 11811143P, 11820040P & 11821143P
Big Block Chevy: Dart Pro-1-355 19574030

Add 100 lbs.
Small Block Ford: AFR 220 Series Part #’s 1065 1066 1110 1112 1114 1115 / Trick Flow Tfs-351-302-188
Small Block Chevy: Allpro 23* #RR245sp-22 / AFR 235 Series, 245 #1138
Big Block Chevy:

NOT LEGAL UNLESS NOTED FOR NA COMBO’S.
Small Block Ford: Edelbrock Victor SR 7721 (add 200lbs for NA)  / Trick Flow Tfs-sb-188-2-1979
Big Block Ford: Trick Flow TFS-5451T802-M87
Small Block GM: Edelbrock Victor 18* Series (add 200lbs for NA) / GM Perf 10033867 / Brodix 10RI, 10X
Big Block Chevy: Profiler 174x-c35

If you do not see your exact Head Listed, please email us the brand and part numbers for approval before coming to a race pscamobile@gmail.com

INTAKE (POWER ADDERS):
4150 flange cast aluminum (Unless listed below) of conventional 1-piece design (non Tunnel-Ram) Intake Manifold. If you’re not sure, please email us at pscamobile@gmail.com with your questions   LS/LSX Legal Composite Intakes: FAST 54039, 146302 / Weiand 5000 / Professional Products Typhoon

INTAKE (Naturally Aspirated):
4150 or 4500 flange cast aluminum (Unless listed below) of conventional 1-piece design (non Tunnel-Ram) Intake Manifold. If you’re not sure, please email us at pscamobile@gmail.com with your questions. 4500 Intake and or 4500 Series Carb add 200lbs

MUFFLERS:
REAL Production Mufflers are required all all cars, no Collector Mufflers permitted unless a Real Muffler is also in place. Modification or removal of muffler internals is prohibited (no gutting). If you’re not sure what a “REAL MUFFLER” is (at least 6″ of the muffler “Main Body” is required) email us at pscamobile@gmail.com Don’t blame us if you show up to race with a fabricated tube you may think is a muffler and you DO NOT pass tech inspection… Still not sure, email a photo of what you got to pscamobile@gmail.com

POWER ADDERS

INTERCOOLER:
Air to Air legal with a 25lb weight Deduct. Air to Water legal but complete system must be mounted from the firewall (engine side) forward… This includes everything including Intercooler, tank, lines, etc…

NITROUS:
Any 4150 Nitrous Spray-Bar Plate of conventional or cross-bar design is legal, but cannot be used with any other power adder and with the following restrictions.
*Only one (1) 10lb Nitrous Bottle is permitted
*Only one (1) -4 Nitrous Bottle line to Solenoid is permitted
*Only one (1) .125″ MAX Orifice Size Nitrous Solenoid is permitted
*Only one (1) Fuel Solenoid is permitted
*Only one (1) Small Purge Solenoid Permitted (Purge plume must be entirely outside of the engine bay and directed upward)

SUPERCHARGER-SMALL BLOCK ONLY: 10-Rib Max Belt (No Cog or Direct Drive)
LEVEL 1 (3200lbs) VORTECH: V3-SCI, V2-S, V2-SC, V2-SCI, V1-S, V1-SC & V1-SCI / ProCharger: PB600B, P1iSC, P-1SC-1 & P-1SC-2
LEVEL 2 (3300lbs) VORTECH: V3-SI, V2-SI, V2-E & V2-SCI / ProCharger: D1 & D1SC / KenneBell: 2.6
LEVEL 3 (3400lbs) VORTECH: V2-Ti, V1-Ti / ProCharger: F1, F1A & F1D / KenneBell: 2.8 & 2.8LC / Paxton: Novi-2000
LEVEL 4 (3500lbs) VORTECH: V7-J, V7-JT, V7-YSi & V2-7YSi/ ProCharger: F1A-91, F1A-94 / KenneBell: 3.6LC

ACCEPTED SINGLE “Non-Billet Wheel” TURBOCHARGER: 76mm with the following guidelines:
Accepted Single Turbochargers: 76mm Single Turbochargers are permitted on
V6 and Small Block V8 engines in accordance with the following
requirements: 1) Turbocharger must be of conventional impeller and
housing design and type. 2) Turbocharger is limited to a maximum size
of 2.99251 inches (76mm) inducer diameter at the point where the leading
edge of the compressor wheel meets the inlet housing. 3) Compressor
cover inlet is permitted a maximum inlet diameter of 4.0 inches
4) Compressor Wheel to housing clearance must maintain a
maximum 0.091 (2.3114mm) clearance beginning from a) the leading edge
of the compressor wheel where it meets the inlet of the compressor
housing, to b) the transition point where the trailing edge of the
compressor wheel meets the volute. 5) All air entering the
turbocharger must pass through the turbocharger inlet. 6) Injection of
any liquid, gas, or any other substance into the inlet or exhaust
housing prohibited. 7) Compressor wheel contour must be continuous
features from the inducer to the exducer (no “stepped” wheels).

Accepted Twin “Non-Billet Wheel” Turbochargers: 55mm Twin Turbochargers are permitted on
V6 and Small Block V8 up to a MAX of 377ci engines in accordance with the following
requirements: 1) Turbocharger must be of conventional impeller and
housing design and type. 2) Turbocharger is limited to a maximum size
of 2.165 inches (55mm) inducer diameter at the point where the leading
edge of the compressor wheel meets the inlet housing. 3) Compressor
cover inlet is permitted a maximum inlet diameter of 2.500 inches
(63.5mm) 4) Compressor Wheel to housing clearance must maintain a
maximum 0.091 (2.3114mm) clearance beginning from a) the leading edge
of the compressor wheel where it meets the inlet of the compressor
housing, to b) the transition point where the trailing edge of the
compressor wheel meets the volute. 5) All air entering the
turbocharger must pass through the turbocharger inlet. 6) Injection of
any liquid, gas, or any other substance into the inlet or exhaust
housing prohibited. 7) Compressor wheel contour must be continuous
features from the inducer to the exducer (no “stepped” wheels).