posted December 20, 2004 10:07 PM
THESE ARE THE BEST RULES FOR A B-MOD THAT I HAVE SEEN TO KEEP COST DOWN ...PERIOD....AND THESE CARS STILL ROCK!!!!
THESE ARE THE RULES FOR BLACKBIRDBEND
The rule and/or regulations set forth herein are designed to provide for the orderly conduct of racing and to establish minimum acceptable requirements for such events. These rules shall govern the condition of all events, and by participating in these events, all participants are deemed to have complied with these rules. No expressed or implied warranty of safety shall result from publications of or compliance with these rules and/or regulations. They are intended as a guide for the conduct of the sport and are in no way a guarantee against injury or death to a participant, spectator or official. The race director shall be empowered to permit reasonable and appropriate deviation from any of the specifications herein or impose any further restrictions that in his opinion do not alter the minimum acceptable requirements. No expressed or implied warranty of safety shall result from such alteration of specifications. Any interpretation or deviation of these rules is left to the discretion of the officials. Their decision is final.
Revised and updated December 15, 2004. Revisions or clarifications are underlined.
SPECIFIC 360 SPORTMOD RULES
This is an entry-level division. Any driver competing in a Modified or Stock Car division will not be eligible to compete in the 360 Sportmod division. Unless otherwise noted, all parts on these cars are to be approved OEM.
SAFETY: Snell SA90 or SA95 helmet required and must be worn at all times car is on the track and must accompany vehicle at time of inspection. Must have helmet shields or goggles for eye protections. Five point safety belts, sub belt, shoulder harness required (three-inch minimum), with quick release type hookups. Seat belts must not be more than three-years old. Aluminum high back seats only and must be bolted in next to left side frame rail and ahead of rear tires. Bottom of seat can be no lower than bottom of frame rail. Roll bar padding (Fire retardant recommended) required in driver compartment. SFI approved full fire suit, fire retardant neck-brace, gloves and shoes required (Fire retardant head sock and underwear recommended). Arm restraints or drivers-side ribbon or mesh window net (minimum 16-inch by 20-inch, no string-type nets) required. Window net to be mounted so latch is at top front of window. Kill switch required within easy reach of driver clearly marked ‘OFF’ and ‘ON’. Fully charged fire extinguisher in secured bracket mandatory, within drivers reach.
ROLL CAGE: Must consist of continuous hoops not less than 1.666-inch outside diameter with a wall thickness of at least .095-inch. Low carbon, mild steel tubing is recommended. Must be frame-mounted in at least six places. No brazing or soldering allowed. Must consist of a configuration of front and rear hoops connected by tubing on the sides or side hoops. Driver's head must not protrude outside cage with helmet on and strapped in driver's seat. Must have minimum of one cross bar in top halo of roll cage. Roll cage must be securely supported and braced. Protection of feet is mandatory. Bar across back of engine with vertical bars and rub rails, or similar protection. No brace bars forward of cage may be higher than stock hood height. Main cage no further forward than engine plate. Minimum of three driver side door bars, at least 1.5-inch O.D., must be as parallel with the ground as possible, and located perpendicular to the driver so as to provide maximum protection for driver, but without causing undue difficulty in getting into or out of vehicle. The sidebars must be welded to the front and rear of the roll cage members. Must have at least one cross door bar, minimum 1.25-inch O.D., on passenger side of car, either horizontal or angled. Steel doorplates, 18-gauge or .049-inch minimum thickness metal, must be securely welded to outside of door bars on driver's side. Plate must cover the area from the top door bar to the bottom door bar and from the rear down post to five inches in front of the seat. Must be visible for inspection.
BODY AND FRAME: Any legal IMCA or WISSOTA type frame or body. Frame may not be widened or narrowed and must be able to support roll cage on both sides. Front cross member may be notched for radiator clearance only. Minimum frame and body height from ground is four-inches (exception; front cross member). Front suspension and steering must be unaltered OEM and in stock location. Stock passenger car spindles only. No fabricated spindles allowed. Tube-type upper A-frame allowed and can be moved. No coil over shocks, front or rear. No homemade coil covers used anywhere on car. No Jeep, Bronco, etc. or four-wheel drive frames. No sport car or front wheel drive allowed. 108-inch wheelbase minimum on both sides. No tolerance. Protective screen required on two-thirds of windshield opening, starting on divers side, supported by minimum of three equally spaced braces. No wings or spoilers.
WEIGHT: Minimum 2600-pounds with driver, subject to inspection at anytime. Ballast (extra weight) added to car for weight rule conformance must consider all provisions of safety and must be fastened in securely. No sand or shot. Weights must be drilled with studs every four-inches coming through for fasteners. All ballast must weigh at least twenty-pounds, and be painted white with car number painted on it. No ballast in drivers compartment. Ballast must be bolted to the frame and cannot be stacked. If ballast is lost on track during race, car may be subject to fine or disqualification.
ENGINE SPECIFICATI0NS: Steel OEM V-8 block only, no GM Bowtie, Ford SVO or Chrysler W-2 blocks. Stroke must match block. Maximum 361 cubic inches (GM): 363 cubic inches (Ford): 370 cubic inches (Chrysler). No 400 or larger cubic inch parts allowed. Maximum compression ratio is 9.0 to 1, checked at anytime with Whistler. No tolerance. Flattop or dish pistons only, no gas ported pistons. Cylinder heads must be unaltered approved OEM and minimum 76 cc combustion chamber. No Vortec heads, GM approved steel head numbers are – 14079267, 3986336, 3986339, 3986339X, 3986388, 393, 3932441, 376445, 3928454, 3932454, 3876487, 3973487X, 3973493, 330545, 3951598, 3961598, 462624, 468642, 330862, 333881, 333882, 3998920, 3998991, 3998993, 3998997, 3970126; Ford - no after market or SVO heads; Chrysler – no after market or W2 heads, 360 cubic inch heads only. No porting, polishing or alterations of any kind to heads, disqualification and $250 fine if illegal. Engine must appear strictly stock. No 400 or larger cubic inch parts allowed. Stroke must match block. Harmonic balancer may not be altered. Must have unaltered approved OEM cast iron two-barrel or four-barrel intake. No porting, polishing or alterations of any kind to intake. No bowtie or SVO manifold allowed. Disqualification and $250 fine if illegal. No full roller or roller tip rocker arms, roller lifters, or stud girdles. Studs may be pinned or use non-shouldered screw-in type.
EXHAUST: Round tube headers only. All primary header tubes must enter directly into one collector, at same point, at end of header. No exhaust sensors, crossovers or balance tubes.
CARBURETOR: Must use one of three approved naturally aspirated carburetors: OEM GM Rochester two-barrel carburetor (only alterations allowed are booster I.D. may be machined to .250-inch and venturi I.D. machined to 1.375-inch). Unaltered 350 cfm Holley – part no. 0-80787-1 with no modifications. Unaltered stock 500 cfm Holley – part no. – 0-4412. Float bowl must face forward. Any adapter maximum 1-inch thick. Maximum .100-inch gaskets only. Exception: choke plate may be removed. Choke housing must remain in place.
FUEL SYSTEM: No more than 22 gallons of fuel at any time. 32-gallon fuel cell allowed (22-gallon fuel cell recommended). Bladder type recommended. Must be mounted by at least two, solid 2-inch wide by .125-inch thick steel straps, completely around cell. Fuel cell must be enclosed in steel container, bolted securely to mounts welded on frame, behind rear axle, between rear tires and no lower than bumper. Fuel cell must be a minimum of 4-inches ahead of bumper. All fuel cell vents must have check valves. Pick-up outlet must be on top of fuel cell. One fuel filter and fuel line only. No cool cans. No top flow air cleaner housings. Mechanical push rod fuel pumps only.
FUEL: Gasoline only, no ethanol. Pump grade recommended. No performance enhancing or scented additives allowed. Fuel sample may be taken from any car at any time. Penalty for illegal fuel is disqualification from event and $250 fine – first offense.
TIRES AND WHEELS: DOT approved McCreary American Racer tires, G-60 (KK704) with or without IMCA stamped on sidewall. No softening, conditioning, siping/grinding (any trace of grinding will be illegal) or grooving of tires. No re-caps allowed. Eight-inch wheel maximum. Wheels must be stock factory built. Bead lock, on right rear only. No aluminum wheels, hubs, calipers or A-frames or any other suspension parts allowed. No plastic wheels. Calipers cannot be lightened and must be OEM. Rotors cannot be lightened or drilled.
BRAKES AND STEERING: Brakes must be operated on all four-wheels and must lock up all four-wheels during inspection. No brake shut off valves. Steering box must remain OEM. No rack and pinion. Must remain within original bolt pattern from type of frame used. Steering may be modified in the driver’s compartment to suit drivers taste, but must be kept on left side. No center steering allowed.
SHOCKS: One steel non-adjustable, non take-apart, unaltered shock per wheel only. Single hole shock mounts only. No coil over shocks, air shocks, remote reservoir shocks or Schrader valves. Front half of shocks may be shielded. One or all shocks may be claimed per event for $50 each.
TRANSMISSION AND REAR-END: OEM manual transmission (3 or 4 speed). Stock clutch or mini clutch allowed. Aluminum flywheel allowed. Must have FULL SIZE steel bell housing. Flywheel MUST bolt to crank shaft. OR an OEM automatic with a coupler. Must use a hand or clutch pedal operated ball valve for neutral. Must use flywheel shield. All forward and reverse gears must be operational. Ford nine-inch rear-end allowed. Floater recommended. Any passenger car type or truck rear-end may be used. No quick-change devices allowed. No cambered rear-ends allowed. No limited slip devices allowed. Must be solid locking spool only. Seventy Two-inches between back of block and centerline of rear-end. Steel drive shaft (minimum 2.0-inch diameter) and slip-yokes only. Drive shaft must be painted white. 360-degree drive shaft loop required and must be constructed of at least .25-inch steel by two-inch steel, or one-inch tubing, mounted six inches back from front U-joint.
BATTERY AND STARTER: One 12-volt battery only, must be in marine-type case securely mounted in metal frame behind seat or in trunk area. Starter must bolt on block in OEM location and directly engage flexplate/flywheel. Must have capability of starting without being pushed or pulled. Must leave initial staging area on demand, unaided, or go to rear of that race. Bump start will be allowed.
GAUGES AND ELECTRONICS: OEM No transmitting or listening devices, digital gauges. No electronic monitoring computer devices capable of storing or transmitting information except tach. OEM ignition only. OEM firing order cannot be changed. No ignition boxes, remote coil or accessories. All wiring must be visible for inspection. No electronic traction control devices. HEI distributor with MSD traction control detector module may be used.
RADIATOR: Only one radiator in stock location positioned ahead of the engine. No dual radiators. 360-degree metal fan shroud mandatory. All radiator screens must be behind the bumper line (not hanging in front of bumper). Aluminum radiators allowed.
ENGINE CLAIMING RULES:
(A) $425 (U.S.) cash claim on engine, $25 of this goes or wrecker-pulling engine.
(B) Claim does not include - 1. Flywheel, 2. Clutch, 3. Pressure plate, 4. Bellhousing, 5. Valve cover breathers, 6. Carburetor, 7. Starter, 8. Motor mounts, 9. Sending units and switches for oil pressure and water temperature, 10. Fan and pulleys, 11. Clutch ball, 12. Clutch arm, 13. Throw-out bearing, 14. Dip stick, 15. Water pump, 16. Fuel pump, rod and plate, 17. Distributor, 18. Plug wires, 19. Water outlet and restrictor 20. Headers.
NOTE: The first decision to accept or reject claim by claimed driver is binding. No driver may claim more than twice and may only claim a driver once during current season. Promoter can claim at any time once the race event is finished.
FINES: All fines will be paid to divisions track points fund.
NUMBERS AND IDENTIFICATION: Numbers must be 24-inches tall by 3-inches wide, and must be located on the doors on both sides of the car. Any letters must be half as large (twelve-inches) as the numbers. Numbers must be single color with contrasting outline. No metallic or prism vinyl numbers without solid colored outlines allowed. A six-inch square number plate with car number and attached to the windshield area so as not to obstruct vision is mandatory. One FREE policy; first visit to Blackbird Bend Motorsports Speedway will not require a number fee registration information must be completed, on second visit a $20 number fee will be deducted from that nights purse check. Please obtain or check on the availability of your desired number before painting your racecar. Numbers may be purchased from one source only to avoid confusion or duplication problems. Contact by mail, Blackbird Bend Motorsports Speedway, PO Box 89, Onawa, IA 51040.
IMCA SPORTMOD WILL BE ALLOWED TO COMPETE UNDER IMCA SPECIFICATIONS.
!!!!!ALSO ANY REARSETUP CAN BE USED!!!!!
[This message has been edited by pbrcowboy2 (edited December 20, 2004).]