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2008 RULES
Dick Leach 219-987-3578 imod@netnitco.net
ALL RULES AND REGULATIONS ARE SUBJECT TO INTERPRETATION BY I-MOD OFFICIALS. If these rules and regulations do not say that you can, then interpret these rules as You can not! The Independent Modified Association is designed to be affordable for the working class racers. With this in mind, the I-MOD officials expect competitors and crew members to conduct themselves appropriately. Any verbal or physical abuse of an I-MOD official by a competitor or crew member will result in disqualification and loss of all monies and points for that entire racing event, a suspension of one more racing event minimum and a minimum of a $100.00 fine and a maximum of a $500.00 fine per person. Fighting by an I-MOD competitor and/or crew member will result in a minimum of a $500.00 fine per person and a 1calendar year suspension.
1. GENERAL MEMBERSHIP A. Drivers are responsible for the conduct and actions of all crewmembers and any unsportsman-like conduct shall be grounds for disqualification or punitive action as determined by an I-MOD official. B. All persons and cars competing in an I-MOD event must be licensed and registered in good standing with the I-MOD Association. Non-licensed drivers and unregistered cars may not participate. Drivers license is $50 per year. Car registration is $25 per year. Temporary license good for one regular competition event only is $30, no special events. C. Decisions of I-MOD officials are final and binding without exception. The I-MOD Association reserves the right to amend the rules from time to time. In some cases, track rules may take precedence over I-MOD rules. Discrepancy shall be brought to an I-MOD official for interpretation. D. To insure safety and equal competition, the following items must be obtained from I-MOD: 4-point rollcage with door bars, template, drivers license, and car registration. E. All cars competing shall display Series & Contingency Sponsor decals located where I-MOD officials dictate. Any car not conforming to this rule will not be eligible for any monies or prizes donated for awards. F: Drivers under the age of 16 without a valid state issued drivers license must rent racetrack and pass driving test with race car and I-MOD official present before competing with the I-MOD association. 2. GENERAL RULES A. BRAKES Pedal and 1 master cylinder. No dual pedal and cylinders. Four wheel brakes are mandatory and must be functional. Front brakes must be stock OEM for 1978-1988 midsize GM metric frame. Rear brakes must be disc. No Drum Brakes. Stock midsize OEM GM metric calipers only on rear. OEM style rotors only on rear. Caliper brackets must be welded to housing. No floating brackets. No lightening or drilling of calipers. Any adjustable proportioning valve may be used. Right front may have shut off valve but must be functional when checked. B. FUEL CELLS Racing fuel cells required, maximum of 22 gallon capacity. Fuel cell must be enclosed in a metal container. Fuel cell must be mounted by at least 2 straps 2 wide x 1/8 thick around cell. Fuel cell must be protected in rear by roll-cage tubing mounted securely. No part of fuel cell shall be lower than protective tubing. Protective tubing shall be no wider than 6 on both sides of fuel cell. C. FUEL Fuel must be gasoline or E-85 fuel only. No racing alcohol, no nitrous oxide, no power enhancing additives. The I-MOD Association reserves the right to test fuel at any time. The I-MOD Association reserves the right to drain competitors fuel and replace that fuel at Associations cost at any time. D. BATTERIES Batteries must be securely mounted and shielded. E. BALLAST WEIGHT Loose objects and/or weights shall not be permitted in drivers compartment. All weight must be painted white and have car number on it. All weights shall be mounted with a minimum of 2 one-half inch bolts. F. ALUMINUM No aluminum wheels, hubs, calipers, control arms, spindles, or any other aluminum suspension parts allowed. Plastic or carbon fiber wheels are not allowed. G. WEIGHT RULE The first 7 finishers must weigh immediately after feature race, with driver and helmet in car. MINIMUM WEIGHT IS 2400 LBS, NO TOLERANCE. Track scales are official and final. The I-MOD Association reserves the right to have additional cars weigh at finish of race or at any time during a competition event. H. RADIOS No transmitting, listening devices, or computers allowed in car. 3. SAFETY A. DRIVERS SUIT SFI approved full fire suit of a flame retardant nature shall be worn by all competitors. Fire retardant gloves are mandatory. Fire retardant neck braces and racing shoes are highly recommended. B. SEAT BELTS 5 point or 6 point safety belts are required and worn during competition. Harnesses shall be mounted securely to roll-cage and/or frame. C. HELMETS Helmets are required and must be approved SHCA or Snell-type full coverage and shall be worn at all times the car is on the track. D. FIRE EXTINGUISHERS Fire extinguishers are required and shall be mounted securely in the drivers compartment. On board fire systems permitted in place of fire extinguisher. E. PADDING SFI approved padding required in drivers compartment where drivers head or limbs may come into contact with roll-cage. F. SEATS Aluminum drivers seat only. No fiberglass or plastic seats. Drivers seat shall remain inside of left rail. 1/8 steel plate or Ό aluminum plate shall be mounted below drivers seat. G. WINDOWNETS: (Mandatory) Drivers window must have ribbon style window net with quick release latch. No Fishnet style nets allowed.
4. FRAMES & CAGES A. FRAMES Only GM 1978-1988 intermediate metric GM frames allowed. The frame must maintain its stock dimensions. Holes may not be cut for lightening. Frame may be cut in rear only, 5 behind center of rear springs. Rear frame rails must run parallel with side frame rails. B. MAIN CAGE Must consist of main cage obtained from I-MOD including but not limited to 3 drivers side door bars, cage must be mounted in at least 6 places. Rear main hoop of cage must be mounted exactly 361/2 behind center body mount hole on OEM frame. This rear main hoop must be mounted at a 90-degree angle to the frame. NO LAY BACK No brazing or soldering of main cage or hoops. Roll cage shall be securely mounted, supported, and braced. C. TUBING Low carbon mild steel tubing is recommended. D. FRONT & REAR HOOPS Must consist of a configuration of front and rear hoops connected by tubing on the sides of side hoops. Drivers head may not protrude above cage with helmet on and strapped in seat. E. FEET PROTECTION Protection of feet is mandatory with bar across back of engine with vertical bars and rub rails or similar protection. F. FORWARD BRACES No brace bars forward of cage may be higher than hood height. G. DOOR BARS Minimum of 3 drivers side door bars (as supplied by I-MOD) shall be mounted as parallel with the frame rail as possible and located perpendicular to the driver so as to provide maximum protection for the driver, but without causing undo difficulty in entering and exiting racecar. The sidebars must be welded to the front and rear of the roll cage members. 1/8 steel plate must be anchored to door bars from behind bend to rear main hoop. No brazing or soldering. H. BUMPERS Bumpers shall be used both front and rear. Front bumper shall be mounted frame-end to frame-end with bottom loop parallel to ground. Bumpers must be made with minimum of 1 1/4 tubing and shall be able to support weight of car if lifted by wrecker. I. NERF BARS Rear bumpers and nerf bar, shall extend to but not beyond width of rear tires. Rear nerf bars are mandatory from rear bumper extending forward to back of rear tire and anchored to frame at front on both right and left sides. J. WINDSHIELD BARS 3 vertical safety bars constructed of 3/8 minimum steel stock shall be centered in windshield area in front of driver and welded securely to roll cage. K. All bumpers, nerf bars, and mounting points shall be ground and capped in a way so as to not create any sharp edges. L. DRIVE SHAFT & LOOP All driveshafts must be painted white. And a driveshaft loop is required and shall be constructed of a minimum of 1x.095 tubing or at least Ό thick x 2 wide steel material. 5.SUSPENSION A. FRONT SUSPENSION components must remain stock OEM for 1978-1988 GM midsize metric frame. Upper control arms may be after market tubular steel. NO ALUMINUM. OEM upper mounting bracket must be used. Lower control arms must be stock OEM midsize metric and must be in stock location. Stock OEM GM rubber bushing only in lower control arms. NO POLYURETHANE, ALUMINUM, OR STEEL BUSHINGS ALLOWED. Stock OEM GM midsize metric spindles only. Spindle savers will be allowed. No truck spindles of any kind. B. STEERING No rack and pinion steering. Steering box must be OEM and remain in original bolt pattern for frame used. Steering quickeners are permitted. No center steering. Steering must be kept on left side of drivers compartment. Must use stock OEM GM midsize metric tie-rods, centerlink, idler arm, and pitman arm. No heim joints allowed. C. REAR SUSPENSION Rear springs must mount in stock position. Rear trailing arms must be stock OEM GM midsize metric and mount in stock position. Trailing arms may be boxed for strength. Stock OEM GM rubber bushings only in trailing arms and trailing arms mount on rearend. NO POLYURETHANE, ALUMINUM, OR STEEL BUSHINGS ALLOWED. Lower trailing arms must be 19 Ό center to center of bolt holes. Upper trailing arms must be 11 1/8 center to center of bolt holes. No heim joints allowed. D. WEIGHT JACKS Weight jacks bolts permitted front and rear. E.SPRINGS All springs front and rear must be a minimum of 4 ½ diameter. Rear springs must mount in stock location. NO COILOVERS. F. SHOCKS No aluminum shocks allowed. Steel shocks only. Only one shock per wheel. Rear shock must mount to factory trailing arm bracket on rear end. Rear shock must travel through factory upper spring mount and anchor solidly at frame or cage at top. All shocks have a $75 claim price. G.SWAY BARS : NO SWAYBARS of any kind will be permitted. 6. BODIES A. BODY SPECS Maximum body width is 66 1/2 . All bodies must be of open wheel design. Side panels and sides of roof may rise above deck a maximum 2. Sides of hood may rise a maximum of 1 above deck and must remain a maximum drop of 4. Rear deck may not be over 20 from top of rear clip to rear of deck. Roofs are mandatory, a minimum of 41 wide by 32 long.. No tunneling of decks. Top interior deck must be above front crossbar and front hoop bars. B. SIDEBOARDS Rear sideboards are mandatory. Sideboards shall be constructed of clear lexan . Sideboards may be lettered but shall not be of background design so as to remain as transparent as possible. C. SPOILERS Rear spoiler must be clear lexan maximum 8 tall from rear deck to top of spoiler. No aluminum or steel. Front spoilers may be clear lexan or aluminum, and may not protrude above plain of hood and can not extend beyond rear of front bumper. D. FIREWALL Firewall and floorboards are mandatory. 1/8 steel plate or Ό aluminum plate required below drivers seat. This is highly recommended for entire floorboard. E. ENGINE COMPARTMENT Engine compartment shall remain open, no side panels. Hood sides shall have a maximum 4 drop and must be enclosed at rear of hood. Hood scoops allowed, maximum height of six inches.
F. BODY APPEARANCE & NUMBERS All bodies must be painted neatly. Numbers and lettering must be in contrasting color from body. All cars shall be numbered, with large, legible numbers (minimum 18 tall & 3 wide) on both sides and roof. Metallic lettering or reflective lettering are not recommended. G. MIRRORS No rear view mirrors allowed on track smaller than ½ mile in length. 7. ENGINE A. BLOCKS Only Chevrolet 305 or 350 cubic in. engines allowed. A maximum of .060 oversize bore allowed. A minimum of zero deck clearance allowed. B. PISTONS Flat top or dish pistons only. Flat top pistons must have 4 valve reliefs of equal size in each piston. C. CONNECTING RODS Stock Chevrolet 5.7 rods or Eagle SIR Part # SIR 5700 BPLW or SIR 5700 BBLW only . No polished beams. No aluminum or steel racing rods allowed. D. CRANKSHAFT Only stock Chevrolet OEM GM 3.48 stroke crankshaft or Eagle ESP Caststeel Part # 103503480 only allowed. Crankshaft cannot be stroked, knifedged, or drilled for lightening. E. CAMSHAFT & LIFTERS Stock OEM 327-350 HP spec hydraulic cam only. NO #4-#7 swap. Cam specifications: @.050 duration; 222 intake and exhaust SAE duration; 290 intake and exhaust Cam lift; .298. Cam part numbers (Speed Pro) #CS179R, (Clevite) #1137, (Crane) #967601. Hydraulic lifters only! no solid lifters, no roller lifters, no hydraulic roller lifters, and no mushroom lifters. F. ROCKER ARMS Rocker arms must be of stock configurations 1.5 or 1.6 ratio. No roller rockers or roller tip rockers. G. CYLINDER HEADS Stock GM heads only. GM part number cast on heads must end in 416,450,601,624,801,882. Intake valve maximum size; 1.94. Exhaust valve maximum size; 1.50. No porting, polishing, or deburring on heads. No match porting to manifold. 3 angle valve job permitted. Intake valves only may be unshrouded where grinding stone or cutter is used for 3 angle valve job or where seats are installed for 1.94 valves. Combustion chamber must be a minimum of 55cc. Screw in rocker studs are allowed. H. INTAKE MANIFOLD Stock GM low rise Quadrajet manifolds only. May be cast iron or aluminum. No Bowties, High Performance, or after market manifolds allowed. No match porting of manifold to heads. No porting, polishing, or machining on intake manifold. I. OIL PANS Wet sump oil system and pans only. No dry sump system allowed. J. IGNITION SYSTEM Stock OEM style HEI distributor only. All ignition related parts must be under cap, coil must be inside cap. No MSD performance modules allowed. All ignition parts must resemble stock GM ignition parts. K. CARBURETOR Stock out of the box Holley 4412 500 CFM carburetor only allowed. Only choke plate and shaft may be removed. Must retain full choke horn. No milling of throttle shaft or throttle plates. Must retain stock boosters, stock venturi bore 1 3/8 , and stock throttle bore 1 11/16 . Adapter plate between intake and carburetor can not exceed 1 ½ ( including gaskets ). No C&S, Barry Grant, etc. The I-MOD Association reserves the right to exchange carburetor with any competitor at any time. L. HARMONIC BALANCERS OEM style harmonic balancers only. No fluid dampers allowed. M. COOLING SYSTEM Cooling system may be modified. No radiators or coolers allowed in drivers compartment and shall not protrude above interior. N. EXHAUST SYSTEM May use any header. Exhaust system must be mounted in such a way as to direct spent gases away from the drivers compartment of vehicle and from areas of possible fuel spillage. O. ENGINE LOCATION Engine must be centered in the frame rails. NO-OFFSET Bell housing flange of block must be a minimum of 72 forward from the center of rear axle. 8. TRANSMISSION Standard production GM T.H. 350 automatic transmission only allowed. Transmission must have 3 forward gears and reverse gear in working order. Only stock OEM style torque converters designed for the T.H.350 with minimum of 12 in diameter allowed only. No lock up converters, no hollowed converters, or trick converters allowed. Transmission coolers allowed. The I-MOD Association reserves the right to exchange torque converter and/or transmission at any time with any competitor. I-MOD also reserves the right to have competitors remove transmission and converter for inspection at any time. 9. REAR AXLE Only GM 10 bolt (7.5 ring gear) rear-end or 9 Ford 58-60 track width, conventional or floater will be allowed. A maximum gear ratio of 6.50 with 9 Ford differential. Ford Floaters will be allowed aftermarket rotors, but must use Stock midsize OEM GM metric calipers on welded brackets. Locked, spool, or positraction style carriers permitted. No aluminum spools or hubs. No hollow axles. 10. TIRES & WHEELS
11. PROTEST RULE
D. CONSEQUENCES: If competitor being protested is deemed legal, he shall receive the $50 protest fee. If competitor protested is deemed illegal, the $50 protest fee is then forfeited to the I-MOD Association. If the competitor making the protest is deemed illegal, the competitor being protested does not have to remove parts. The protest fee of $50 is then forfeited to the I-MOD Association. When a car is deemed illegal, the competitor and the car are suspended for 2 weeks of competition, fined $200, and loss of all monies and points for that night of competition. If a competitor and /or car is deemed illegal a second time, the competitor will be fined $300, loss of all monies for that night, loss of points for the season, and suspended for 1 calendar year. If a competitor is deemed illegal a third time, a lifetime suspension from the I-MOD Association will be imposed. E. REFUSAL: Refusal to tear down or removal of parts for inspection carries the same penalties as an illegal engine or illegal parts. F. FINES & SUSPENSIONS: All fines levied will be paid in full before competitor and/or car are eligible to compete. All fines and suspensions will carry over to future years of competition G. AUTHORIZED PERSONNEL: I-MOD officials and only 2 persons ( Driver & 1 pit member) from the car or cars involved with the protest will be allowed in the direct area of tear down. Any unauthorized person will be removed from the area and the car they are with will be fined a minimum of $100 and disqualified for the night with loss of monies and points for the night. THE I-MOD ASSOCIATION RESERVES THE RIGHT TO TEAR DOWN ANY ENGINE OR HAVE ANY PARTS REMOVED FOR INSPECTION AT ANY TIME.
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