upcoming races
Las Vegas
St. Louis

LAS VEGAS // November 16-19 2017

ST. LOUIS // August 2-4 2018

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class rules / LAS VEGAS Ross racing pistons 235 Limited

Ross Racing Pistons 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 feature limitations in Cubic Inch Displacement, Power Adders and all cars will have to use a Small Rear Radial Tire (235 M/T Drag Radial Part # 3450 or 3752R Only)

 

235 Limited will run on a 1/8th mile format with a "Qualified" (32-car) field with Alternates

 

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 of any design or Air-inlets added 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: 235 Limited Class sponsor decal (Ross Racing Pistons) must be placed in the lower passenger corner of the front windshield. SCSN Decals must be placed on both left & right sides of race car on the rear 1/4 Panel or wing in a highly visible location.

 

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)

Bolt On Traction/Slapper Bars are allowed.

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 and not permitted.

 

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 - 444ci 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.

 

ON BOARD DIAGNOSTICS / DATA RECORDERS:

On board diagnostic computers and recorders are permitted. Memory and playback tachometers are allowed.

 

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 future SCSN Events (Including Street Car Super Nationals St Louis & RMSS) for the period of 13-Months. In addition a Donation of $1,000.00 must be made to a SCSN 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.

CYLINDER HEADS: (See section under weight adds)

 

INTAKE (POWER ADDERS): 4150 flange as-cast aluminum of conventional 1-piece design (non Tunnel-Ram) Intake Manifold. Intake must have a visible part number from the manufacture to prove its of 4150 design. Porting is allowed but intake cannot be cut-up, welded-on or altered in any way from its original design. 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 235 Limited 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 Plate 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).

 

TIRES-REAR: M/T 235 Drag Radial (3752R) and (3450)

 

235 LIMITED WEIGHT GUIDE

 

Base Weight (All weights are race-ready, car with driver)

4 Cly VW Air-Cooler W/Any Power Adder................2050 lbs

4 Cly – Rotary W/Any Single Power Adder................2250 lbs

V/6-I/6 W/Nitrous.......................................................2700 lbs

V/6-I/6 W/Turbo or Blower........................................3000 lbs

Small Blocks N/A.......................................................2800 lbs

Small Blocks W/Nitrous (up to 415ci).........................3100 lbs

Small Blocks W/Nitrous (416-434)...........................3200 lbs

Small Blocks W/Nitrous (435-444 Max).....................3300 lbs

Small Blocks Supercharged (Level 1) ......................3200 lbs

Small Blocks Supercharged (Level 2) ......................3300 lbs

Small Blocks Supercharged (Level 3) ......................3400 lbs

Small Blocks Supercharged (Level 4) .....................3500 lbs

Small Blocks Single Turbo up to 67mm ...................3200 lbs

Small Blocks Single Turbo (67.01 to 71mm).................3300 lbs

Small Blocks Single Turbo (71.01 to 74mm).................3400 lbs

Small Blocks Single Turbo (74.01 to 76mm MAX)..........3500 lbs

Small Blocks Twin Turbo (Max 55mm Max 377ci) ....3500 lbs

Big Blocks N/A (up to 472ci)......................................3100 lbs

Big Blocks N/A (473 up to 525ci)................................3200 lbs

Big Blocks W/Nitrous (up to 472ci)............................3300 lbs

Big Blocks W/Nitrous (473ci to 515 Max)...................3400 lbs

 

235 LIMITED WEIGHT ADDS & DEDUCTS

 

Add 200 lbs. For Use Of A 4500 Series Carb and/or 4500 Style Intake Manifold on a NA Combo

Deduct 50 lbs. For Use Of A "Blo-Thru" Carburetor on a Boosted Combo

Deduct 25 lbs. For Air to Air Inter-Cooler on a Boosted Combo

Deduct 50 lbs. For No Inter-Cooler of any-type on a Boosted Combo

Deduct 100 lbs. For "310ci or less Boosted Small Blocks" (not including Mod Motor)

Deduct 150 lbs. For "2-Valve Mod Motor" Combo's

 

235 LIMITED CYLINDER HEAD WEIGHT ADDS:

 

Add 0 lbs. Any OEM Factory Cast Iron/Aluminum Heads (This does not include GM Performance, Ford Racing or Mopar Performance Parts listings)

Small Block Ford: 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 / Canfield 0902 6007 /

 

Add 50 lbs.

Small Block Ford: Trick Flow TFS-51910002-M44, TFS-51700001, TFS-51710001-M64 / AFR 205 Series / Speedmaster PC3061

Small Block Chevy: Dart Pro-1 230 Series #'s11710040P, 11711143P, 11720040P, 11721143P, 11810040P, 11811143P, 11820040P & 11821143P

Big Block Chevy:

 

Add 100 lbs.

Small Block Ford: AFR 220 Series / Trick Flow TFS 52410003-M61

Small Block Chevy: AFR 235 Series, 245 #1138

Big Block Chevy: Dart Pro-1-355 19574030

 

Add 150 lbs.

Small Block Ford:

Small Block Chevy: Brodix -10 BRO-1100002, Dart 220

 

Add 200 lbs.

Small Block Chevy: Pro-Filer 176X

 

Add 250 lbs.

Small Block Chevy: Allpro 23* #RR245sp-22

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, tfs-5171t016-C02

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

 

235 LIMITED REQUIRED DECALS:

 

Class Sponsor Decal: "Ross Racing Pistons" decal must be installed on base of windshield on the passenger side.

(Bottom left hand side when looking at front of vehicle windshield)

 

Class Presented By Decals: "TBD" decal must be installed on base of windshield on the drivers side. (Bottom right hand side when looking at front of vehicle windshield) Decals will be available during registration at the SCSN Event Trailer

 

SCSN Series Decals: SCSN Decals must be placed on both left & right sides of race car on the 1/4 Window, 1/4 Panel or Side of Rear Wing in a highly visible location

 

SCSN Series Sponsor Decal: Extreme & Unlimited Products Decal must be placed on the rear 1/4 Window, 1/4 Panel or Side of Rear Wing in a highly visible location

 

Contingency Program & Contingency Decals:

In order to receive Contingency Monies from any of the listed Contingency Sponsors, you must have the correct product listed and matching Contingency Decal for that product on your car for the entire SCSN Racing Event... Racers will be checked for Products & Decals while be teched in and winners & runner-ups again will be checked in the Winner's Circle after the conclusion of each event. Winners & Runner-ups failing to show up for this mandatory Inspection will forfeit all Contingency Money that is owed!!!! All Contingency Decals may appear anywhere on the vehicle in a clear and organized fashion. Contingency decals may not be overlapped or modified. Most decals are available at the SCSN Event Trailer, but in the event the SCSN does not have the decals in stock, it is the racer's responsibility to obtain the proper decals to be eligible for the Contingency payout.

 

RACE DAY POLICY'S

 

Alternating Lanes During Qualifying: Each 235 Limited driver must alternate lanes during qualifying. Even if you skip a session, you must run the opposite lane you made your previous run in. If you choose to ignore this rule, your second consecutive pass in the same lane will be disqualified.

 

BYE-RUNS: All 235 Limited vehicles must take the tree, and run down the 1/8 mile.

 

SCALES: After each qualifying and elimination pass, all 235 Limited cars must stop and weigh at the track scales. If you lose in eliminations, and your opponent fails to make weight you will be reinstated into the eliminations only if you made minimum weight requirements. If both cars failed to make minimum weight, both cars will be disqualified. It is the driver's responsibility to verify with each track scale, the weight of his/her car prior to each race day. There will 5lb error factor allowed.

 

TOW BACK & TOW VEHICLES: All 235 Limited entries are allowed to tow to staging lanes and to the track scales. All are subject to be searched by a SCSN Official at any time.

 

WINNERS CIRCLE PICTURES & CONTINGENCY VERIFICATION: 235 Limited Winner & Runner-up must return to the SCSN Winners Circle Area for Official Photographs and Contingency Verification. Failing to do so, will result in loss of all contingency monies earned. There are no exceptions!!!

 

All drivers and vehicles must meet current NHRA and track requirements.

 

PAYOUTS

$1,000 / To Win

$500 / Runner-up

$250 / Semi's

Class Entry Fee: $100 (Plus $80 Track Tech Card)

 

Once Your Vehicle Passes Tech Inspection, There Are No Refunds!!!

 

2016 235 Limited Champion
 Eric McEwan

QUESTIONS?

 

Heather Roth: Event Coordinator

heather@streetcarsupernationals.com

Call/Text 1-702-701-6464

 

Mel Roth: President

mel@pscaracing.com

Call/Text 1-661-917-3078