Doug Fort's

"The West's Best Short Track!"

OFFICIAL 2006 SPECIFICATIONS
I.M.C.A. Sanctioned

ATTENTION ALL DRIVERS: Our goal is to complete our racing program by 10:30 p.m. The pit booth will be open from 2:00 p.m. to 5:00 p.m. and the following will be enforced... Any driver not in his assigned starting spot when the cars roll onto the track for any event, will start at the rear of the pack. Once the initial green flag has been thrown, you may NOT join the field unless there is a complete restart. All races will use a rolling start. Sponsors will be read over the P.A. system during the course of the evening.

I.M.C.A. Modifieds - Rules   (from http://www.imca.com/rules/mod1.html)

International Motor Contest Association
1800 West D Street • P.O. Box 921 • Vinton, Iowa, U.S. 52349
Phone: 319-472-2201 • Fax: 319-472-2218

Revisions/clarifications are highlighted in blue, recommendations are italicized.


1. SAFETY EQUIPMENT:
Rules apply at all times car is on track. Snell-rated SA95 or SA2000 helmet required. Roll bar padding required in driver compartment (Fire retardant recommended). SFI-approved full fire suit, fire retardant neck brace, gloves and shoes required. Recommended: Fire retardent head sock and underwear; head and neck restraints; collapsable steering shaft. Driver-side window net required, minimum 16"x20" ribbon or mesh style, and must be mounted so latch is at top front of window. Minimum three-inch wide five point safety belt assembly required, must be mounted securely to roll cage, recommended to be no more than one year old. Kill switch required within easy reach of driver and must be clearly marked ‘OFF’ and ‘ON’.

2. FRAME:
OEM complete, 1964 or newer, perimeter American rear-wheel drive passenger car frame only. No sports car frames. Frame must be full and complete, cannot be widened or narrowed, and must be able to support roll cage on both sides, except: weight jack in original center line of spring tower allowed; frame may be cut a maximum 36 inches forward from center of rear end housing; horns may be removed in front of steering box; front crossmember may be notched and boxed for radiator and/or steering clearance; maximum seven-inch wide opening in side of spring tower for spring removal. Maximum two-inch wide by four-inch tall frame stiffener may be welded directly to outside of left side frame rail. Minimum wheelbase 108 inches, maximum 112 inches, both sides. Maximum overall width (front or rear) shall not exceed 78 inches from outside of tire to outside of tire. No part of frame can be lower than four inches from ground except front crossmember.

3. ROLL CAGE:
Must consist of continuous hoops, minimum 1.75-inch O.D. tubing, with a minimum wall thickness of.095-inch for main cage, frame-mounted in at least six places, low carbon or mild steel recommended. Must consist of a configuration of front, rear and top hoops connected by tubing on sides or side hoops. Driver’s head must not protrude outside cage with helmet on. Roll cage must be securely supported and braced with minimum one cross bar in top halo. Foot protection bar required. Main cage no further forward than rear of engine. All bars forward of cage must be lower than hood.

4. DOOR BARS:
All driver side door bars and uprights must be minimum 1.5-inch O.D. and .083-inch wall thickness. Minimum three driver side door bars, parallel to ground and perpendicular to driver, and welded to front and rear of roll cage. Passenger side must have at least one cross door bar, horizontal or angled, minimum 1.25-inch O.D. and .083-inch wall thickness, and one top door bar, minimum 1.5-inch O.D. and .083-inch wall thickness. Steel door plate, 18 gauge or .049-inch minimum thickness, must be securely welded to outside of driver side door bars and cover area from top door bar to bottom door bar and from rear hoop down-post to 5-inches in front of seat. Must be visible for inspection.

5. BODY:
(click here to see diagram)  Must be same width, front to rear, and parallel to OEM frame. Engine compartment must remain open (no side panels). Hood must be enclosed at rear. No panel in front of right door to engine compartment. No inner panels. No car covers. Must have front windshield and rear window support posts. Driver and passenger side windows must have at least 12-inch opening, measured at center of window, between lowest point at top of window, whether roof or roll cage, and highest point at bottom of window, whether interior or body. May use Lexan in sail panels. May use full windshield. Must be fiberglass full size roof, rounded in all directions. No wings or spoilers. Maximum 4-inch plastic skirting allowed on bottom of doors and quarters. No reflective doors or quarter panels. Outside of tires must be widest part of car.

6. DRIVER COMPARTMENT:
Must have minimum three windshield bars in front of driver. Lexan or aluminum cowl panel in front of driver can be no wider than cockpit and no farther back than steering wheel. Minimum .125-inch aluminum, or .060-inch steel, complete floor pan required. Aluminum high-back seat 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. Driver must be sealed off from track, driveline, engine, fuel cell, cannisters and pumps. Oil coolers must not protrude above interior. Accumulators cannot be mounted between driver and left-side door bars. No devices that would enable driver adjustment to alter wheelbase or for weight jacking while car is in competition. No mirrors or reflective sun visors.

7. FRONT SUSPENSION:
All components must be steel, unaltered OEM, in OEM location, and replaceable by OEM parts, except: tube-type upper A-frames with or without aluminum/steel cross shaft, and mounts can be moved; OEM replacement lower A-frames displaying 'I.M.C.A.-approved' decal; lower A-frames must be right and left, and of same design; rubber, nylon or steel lower A-frame bushings, no offset or bearing type; welded or bolted shock mount on lower A-frame. Lower A-frame mounts and bolt holes on frame must be in OEM location. OEM ball joints only. Sway bar must be unaltered OEM.

8. STEERING:
All components must be steel, unaltered OEM, in OEM location, except: outer tie rod end and adjustment sleeve may be replaced by a minimum .625-inch steel rod end and steel tube; spindles can be ground for brake caliper clearance only; unaltered, OEM replacement Pinto spindles with 'I.M.C.A.' raised cast; spindles must be right and left, and of same design; bolt on spindle savers allowed; steel steering shafts and knuckles only; steering quickener, steering wheel and quick release may be aluminum; cockpit steering may be modified, must be kept on left side. No rack and pinion.

9. SHOCKS:
One steel, non-adjustable, unaltered shock per wheel. One additional shock allowed on rear suspension. No bumpers or stops. No threaded body, front coil-over, air, or remote reservoir shocks. No Schrader valves. Front half may be shielded. $50 claim per shock, one or all may be claimed per event, counting as one claim on card, following shock claim procedures and penalties (see rule book).

10. SPRINGS:
One steel, non-progressive coil spring, and/or steel leaf spring per wheel only. One additional spring allowed on pull bar or lift bar, may be progressive. Any coil spring must be at least 4.5 inches O.D. No torsion bars or air bags.

11. REAR SUSPENSION:
All components must be steel. No covers allowed. All trailing arms/link bars must be solid tubing. Rear of frame may be altered to accept leaf or coil springs. Steel coil-over eliminators, or steel/aluminum coil-over kits allowed - must conform to shock and spring rules. One mechanical traction bar (pull or lift, not both). Rubber bumpers allowed only on panhard bar and mechanical traction bar. No sway bar. No chains or cables (except on front of lift bar). Minimum 19-inch long panhard bar, measured straight line, center to center.

12. REAR END:
Any steel approved OEM passenger car or truck rear end allowed. Safety hubs (floater) allowed. All components must be steel, except lowering blocks, axle cap, and drive flange. Inspection hole in housing is required. Full steel spool, steel mini spool or welded rearends only. Steel axles only. No quick change devices, or cambered rear ends. One piece drive flange only. No torque dividing differentials. No scalloped ring gears.

13. BUMPERS/RUB RAILS:
(See diagram) Steel only. Bumpers must be used both front and rear at all times and welded, or mounted with minimum .375-inch bolts. Must be minimum 1.25-inch O.D. tubing, .065 wall thickness on front - .095 wall thickness on rear. Two-bar front bumpers must be mounted frame-end to frame-end, no wider than width of material outside frame horns and with bottom loop parallel to ground. Top bar must be directly above bottom bar, minimum 6.5 inches apart, measured center to center. Rear bumper and nerf bars can be no wider than tires.
 

Doug Fort's

"The West's Best Short Track!"

E-mail
P.O. Box 1270 ~ Morro Bay, CA ~ 93443-1270
Tel: 805-466-4462 ~ Fax: 805-466-1514