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Pro Gas Drag Racing Rules
CB 044 Pro Gas Body and Chassis RulesChassis Must be factory VW STEEL complete floor pan, stamped steel floor pans are mandatory and must be welded to tunnel. Pan head must be in place. Pie cutting of pan head is allowed for added caster. Tubular chassis are NOT allowed Narrowing of torsion Housing is allowed Raising of torsion housing is allowed, Max-3 inches Must retain factory frame horns, Frame horns may not be modified in any way 1 inch transmission raise is allowed for all cars, including raised torsion housing cars Karman Ghia body cars are NOT allowed to raise torsion housing 9.0 inch maximum measured tire width Wheelie bars may be used, 60” inch maximum length NHRA engine oil containment pans or blankets must be used. Roll bar or roll cage is mandatory and must be NHRA approved. Body Type-1 and type-3 are allowed bodies for class. Karman Ghia Body is allowed Convertibles are NOT allowed Factory windshield angle must be preserved No open air vehicles allowed, I.E manx type vehicles, etc Max 4” chop top allowed Minimum roof height-48 inches NO Sectioning of body allowed. NO Channeling of body allowed Fiberglass fenders, doors and front ends are allowed, no carbon fiber Stock width fenders or wider mandatory Rear fenders can be raised for tire clearance Lexan windows are allowed Deck lid is mandatory, Stock replacement fiberglass deck lids may be used, aluminum fabricated deck lids are allowed. Wings Dragster style wings are NOT allowed
in this class. A wing of a single plane Air Induction Non factory air induction of any kind were air is ducted into engine compartment is NOT allowed, I.E Naca Ducts, ducted air through scoops, under vehicle chassis, windshields. Cars that have air induction from racing in another class must show sufficient proof that air induction is disabled or car will not be allowed to race in class. If vehicle owner is caught modifying air induction before or after a round, vehicle owner and car will be disqualified and loss of payout and points will be implemented. Pressure boxes and OR Carb trays are NOT allowed Shocks Single knob adjustable rear and front shock may be used, must be commercially available Aftermarket torsion bars and spring plates are allowed, must be commercially available. Spring plates must be factory length. NO electronic or pneumatic shock controllers are allowed Narrowed axles are allowed IRS suspension is allowed Shifter and Clutch H-Pattern shifter is the only shifter allowed NO Vertigate style shifters allowed NO electronic type shifter allowed Allowable Clutch engagement is by cable or hydraulic, I.E Neal/CNC pedal assembly Clutch release has to be foot operated only, NO air activated, selenoid activated clutch release allowed Hyrdaulic or manually activated clutch management is allowed. Transmission Allowed transmission- Type-1, Type-2, Mendeola NO Sequential shifted type transmissions allowed IRS to Swing axle conversion “Dave Folts” kits are allowed Swing axle or IRS suspension only NO coil over/ladder bar type suspension allowed Weight Limit Minimum Weight limit for CB 044 Pro Gas is set at 1725 lbs. There will be a 25 lb weight penalty for raised torsion housings. The Minimum weight for Karman Ghia body cars is set at 1725 lbs. The weight penalty rule for CB 044 Pro Gas is subject to change if PRA deems necessary. CB 044 Pro Gas Engine Rules2332cc Max Engine Displacement 84mm stroke max, Any manufacturer, may be flanged, wedgemated, any main bearing dimensions O.K, min 2" rod journals, crank may be turned for repair, No offset grinding, No knife edging of crank is allowed. Rods - Steel rods only, any manufacturer allowed, minumum rod length is 5.325 maximum rod length is 5.700, .866 I.D pin bushing only. Push rods - Steel only, any manufacturer allowed 94mm bore max Flat top piston only any manufacturer, any ring type allowed, 3 ring grooves Mandatory, No gas porting allowed, Minimum compression height-1.300, Minimum piston weight with pin- 475 grams, Valve relief’s are allowed. Wrist Pins- Minimum wrist pin wall thickness-.120, Steel wrist pins only, .866 wrist pin diameter only. 044 CNC Wedge Port head as SPEC head for class. Heads must use components that are sold with the #1411 wedge port head, NO exceptions. Springs may be shimmed for proper installed height. Installed valve spring height must remain within 1.500-1.530, NO exceptions. Any depth flycut allowed, welding between chambers allowed for strength when heads are flycut. Welding of head in any other areas other than between combustion chambers is Not allowed. NO modifying, porting or blending of ports is allowed, NO modifying, un-shrouding, or blending of chambers is allowed. If seats are replaced to repair heads, intake seat I.D must remain at 1.530, exhaust seat I.D must remain at 1.320. Valve seat depth must remain at factory height if seats are replaced. NO shortening or profiling of valve guides is allowed. Intake manifold stud location may NOT be relocated. Servicing of heads - If heads are serviced, all parts must be factory CB #1411 wedge port replacement parts, NO exceptions. Rev Control - NO Internal or External rev kits allowed to control valve train. Intake manifold - Accepted manifolds; CB Performance- IDA#3155 / IDF#3157 Bugpack- IDA#1044 / IDF#1038 Berg- IDF#GB580A / IDA#GB590 Scat- IDA#30122 IDF#30076 Manifolds may be welded up to 1-1/2 inches from base ONLY to allow match porting and strength, Manifolds may be match ported. Epoxy of any Kind is not allowed internally or externally on manifolds. Valve and seat angles - Seat-30/45/60/75 degrees only. Valve-30/45 degrees only. Rocker arms - max 1.5 ratio, any manufacturer, keep in mind that the valve springs are only capable of .630 lift. Valve Springs - Valve springs may NOT be modified in any way. Replacement valve springs must be CB part# VW650 Cam - must be flat tappet cast iron cam any manufacturer is allowed Cam gear - any manufacturer Ignition - any type of distributor allowed, no crank trigger allowed, may use any manufactures coil, Locked timing or mechanical advance only, No timing control, Case - stock magnesium or Auto Linea aluminum Oil pump - Full flow style only, no dry sumps, external oil bypass allowed Oil sump - any manufacturer allowed Exhaust - any manufacturer allowed and any size allowed, step headers are allowed. NO over the top exhaust are allowed. Carburetion - 48mm throttle plates max, 44mm venturie max, No Mechanical Injection allowed, No EFI allowed, Approved carburetors for class- Spanish or Italian Weber 48 IDA/IDF, Dellorto 48 DRLA, No carb modifications allowed to improve air flow, Aftermarket velocity stacks O.K, float bowl enlarging O.K Lifters - cast iron only, no composite lifters allowed, must be standard VW O.D dimensions, Minimum lifter weight is 70 grams Clutch - Stock style and J&G clutches are okay. No other clutches are allowed. Clutch Disc - Single disc ONLY, 200mm only, any manufacturer Flywheel - Must use steel flywheel, 12lbs min weight, 17 pounds Max flywheel weight, 200mm disc surface only, Flanged flywheels O.K Fuel - VP C-12 will be the spec fuel for the class Vacuum pumps are NOT allowed Nitrous Oxide is NOT allowed Data Acquisition - Data acquisition of any kind is NOT allowed CB 044 Pro Gas Payout Schedule8 Car field Win-$600.00 CB Bonus Payout for winner-$300.00 5 Car Field Win-$300.00 CB Bonus payout for
winner-$300.00 2 Car Field Win-$150.00 CB Bonus Payout-$150.00 |
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