2012 B-MOD RULES

Frames: Factory production complete American passenger frames only. Frame rails must extend to a point beyond the base of driver’s seat. Rear clip may be fabricated out of tubing. Front and rear pickup loop required.

Body: Same as A-mod rear spoilers optional 5 inch max height.

Wheel base: 108” min. 112” max. both sides.

Roll cage: M ust consist of continuous hoops not less than 1½" tubing .095 must be frame mounted in at least 6 places. Min. 3 drivers side door bars and min 3 bars in front of driver.

Weight: M in. 2,450lbs. with driver after race with open chamber OEM heads.  Double hump heads or aftermarket heads must weigh 2,550lbs. with driver after race. NO TOLERENCE!!!!

Wheels: 8” steel wheels max. No aluminum wheels. Beadlock on right side only. Wheel disc allowed.

Tires: American Racer kk 704 mod tire ONLY.  Must durometer 50 or higher. No tire doping or any additives period.  

Rear-end: Any passenger car or truck rear-end may be used, no aluminum or quick change devices allowed. Floaters are allowed.

Brakes: Disc or drums front or rear. All brakes must work and RF shut off ok.

Fuel: Pump gas or racing gas ok. No electric pumps. No alcohol.

Bumpers: Must have front and rear bumpers.

Engine: Must use cast iron v8 style engine. Max. cid- GM 361 CID, Ford 360 CID, Chrysler 370 CID, no larger cubic inch parts allowed. No aluminum valve train parts allowed. Stock appearing crank and rods only. No aluminum or lightweight engine parts allowed. A min. 1” plug above oil level in the oil pan for inspection. Stock appearing harmonic balancer, no 400 blocks or 400 parts allowed, no stroked or destroked motors.

General motors: Must be 3.48 stroke and 4.060 max. bore must use following blocks - 3892657 - 3914678 - 3932388 - 3932386 - 3956618 - 3970000 - 3970006 - 3970010 - 3970014 - 10066033 - 10066036 - 14010207 - 14010209 - 4010287 - 14016376 - 4016379.

Heads: GM 3986336 - 3986339 - 3986339x - 3986388 - 3932441 - 3973487 - 3973487x - 3973493 - 3951598 - 468642 - 333882 - 3998920 - 3998991 - 3998993 - 3998997 - max. 2.02 in. 1:60 exh. Valves. vortec heads are allowed . Studs may be pinned or screw in studs, roller tip rockers ok. Polly locks ok. No stud girdles. No porting polishing or alterations of any kind to intake or heads. No  bowtie, or angle plug heads allowed. Double hump heads are ok. This is the only small chamber head allowed. World product # 4266gn8b or IMCA EQ head # ch3501 is the only aftermarket head allowed must have stamp and serial # flat top pistons only. Must use flat tappet cams and lifters. Any length push rods allowed.

Ford max. 360CID any ford cast iron OEM head with inline valves ( no canted valve) max. valves 2.04 in. - 1.70 exh no SVO heads or gtp heads. world products 53040 ok ,dart 13311112 or rhs 35302 . No porting polishing. Flat milling ok. Guide plates screw in studs ( 0.375”max ) and poly locks allowed. No stud girdles, roller tip rockers ok. Flat top pistons only. 3.50 max crank stroke.

Chrysler max. 370 CID any OEM cast iron head with inline valves ( no canted valves ) no valves larger than 2.04 Int. 1.70 “ Exh. No porting or polishing of heads flat milling allowed. No w-2 heads allowed. Or you may use rhs20300 or 20301 . May use OEM rockers arm bars. Flat top pistons only. Max crank stroke 3.58.

Track has option to enforce these restrictions with a CID pump or by visually checking parts and part numbers. The center of the crankshaft must be within 2 ½” of centerline of the balljoints. No dry sumps allowed.

Front suspension: Must be OEM parts other than upper A-arms and mounts. Lower A-arms OEM only OEM spindles only no coil over shocks allowed. One shock per wheel. Steering box must be OEM and in stock location. No rack and pinion.

Rear suspension: Two options aftermarket three link or multi leaf spring design. All components must be steel all mounts and brackets must be welded or bolted solid. Three link design min 16” lower control arms. Must use one upper control arm solid tube only (pull bar) no springs or biscuits . May use min. 19” long pan hard bar located behind housing or min. 19” long j-bar mounted to steel pinion bracket measurements are from center of heim to center of heim may mount rear spring directly over axle housing or use coil over eliminators ( sliders ) lower spring perch or coil over mount must be welded to housing. No birdcages or floating mounts allowed.

Multi-leaf spring design must use steel multi-leaf springs with no additional suspension besides one shock per wheel.

Rear-end: Any passenger car rear-end allowed, must be centered in chassis. All components must be made of steel. 9” Floaters are ok. No quick change devices allowed.

Shocks: No aluminum shocks allowed. No coil over's shocks allowed. One shock per wheel only.

Carburetor: Must use unmodifed Holley 500 cfm with 4412 base you may remove choke butterfly but must have choke horn with or without 1” carb spacer.  Must pass go-no-go gauges no altering of carb from orignal specs Carburetor Claim rules is 250.00. the carburetor may be claimed by any driver or owner of car that finishes on lead lap.

Intakes: dual plane Intake manifold, No performance RPM or Air cap intake.   GM Weiand 7547-1,Gm Edlebrock 2101 Ford 7121, Weiand 8023 Chrysler 2915 allowed If using vortec heads edelbrock 2116 . 

Transmission: Any 2, 3, or 4 speed trans, all forward and reverse gears must be in working order. Automatics may run gate valve. Standards may run 71/4” min mini clutch. No Bert, Brinn, or Falcon type transmission allowed.

Driveshaft: MIn dia 2” Must be painted white with car # on it.

Electronics: All cars must have On & Off master switch clearly marked on & off.  12v Ignition only, Hei type distributer only. No Ignition boxes or remote coil accessories. No electronic traction control allowed and Oem fire order only.

Headers: Any collector type header allowed. No zoomies.

ANY DRIVER WINNING 3 RACES MAY BE SUBJECT TO PULLING A HEAD OF THEIR CAR. MAS RESERVES THE RIGHT TO CHANGE OR MODIFY ANY RULE FOR THE IMPROVEMENT OR SAFETY OF THE SPORT.