BOLIVAR SPEEDWAY
2010 American Modified
Driver must have valid drivers license
Body/Chassis
1. Any year American made full frame production car.
2. Stock frame rails may be cut off, 36” max. from rear axle centerline.
3. Rear clip may be fabricated from square or round tubing.
4. Aluminum or fiberglass body only.
5. Body and quarter panels must be contoured or have formed in style lines.
6. No flat slab type bodies.
7. Roof must maintain maximum of 2” slope rear to front.
8. Roof must be rounded in all directions (NO flat tops).
9. Must have front door posts and rear sail panels on both sides of roof.
10. Body must not extend forward past rear of motor.
11. Floorboard must be steel, 16ga. Minimum.
12. Engine compartment sides must remain open.
13. Left and right side window openings must have 12” minimum opening.
14. Full Lexan windshield with 3 support straps recommended. 5 safety bars with screen acceptable.
15. Hood must be securely pinned.
16. Spoiler allowed, Maximum of 5” tall. Sides and inner braces can not be any taller than spoiler.
17. Minimum of 4” frame ride height.(without driver)
18. Minimum 108” wheelbase.
19. Body is to be maintained in good condition and appearance through out the season.
Roll Cage
1. Must have at least 4 upright bars and 2 down tube bars to rear frame rail. Must have at least 3 left side door bars and 2 right side door bars.
1 horizontal bar behind driver and 1 angle brace bar behind driver, from horizontal bar to top of cage. Left leg protection bar recommended.
2. All cage bars MUST be round roll bar tubing, no less than 1 ½” in dia. and .095 in thickness.
3. Must have a minimum of a .062 thick steel door plate welded to outside of left door bars, top to bottom and front to rear.
4. All cage points must attach directly to main frame rails.
5. Drivers head must have min. of 3” clearance between top of helmet and halo bar.
Bumpers
1. Front bumper must be constructed of round tube only, 1 ¼” min. to 2” max.
2. Front bumper must be double tubes, 10” apart.
3. Rear bumper must be constructed of round or square tubing, with no sharp edges. Manufactures type aluminum rear bumpers allowed.
4. Rear bumper may not extend past width of rear tires.
5. Right nerf bar can not extend out past outer edge of front or rear tire.
6. Bumpers must be able to support being lifted and towed from.
7. Rear bumper MUST be in place in order to compete.
Numbers
1. All cars MUST have large legible numbers on both doors and on top (reading from passenger side) in contrasting color from body.
2. Numbers must be at least 4” thick and 18” high on doors and 24” high on roof.
3. Car must have complying number in order to compete.
4. NO spray can or tape numbers allowed.
Seat
1. Must have a racing type aluminum seat at least .090” in thickness.
2. Must have at least 4 bolts attaching seat to cage or frame, 2 in bottom and 2 in back of seat.
3. Bolts must be at least 7/16” Grade 5 with fender washer under head.
Belts
1. Must have 3” lap and shoulder belts. In good condition, no more than 4 years old.
2. Must be mounted with ½” Grade 5 bolts.
Window Net
1. REQUIRED. MUST be securely mounted to body or cage at bottom.
2. Must be securely driver attachable and removable at top.
3. Must be attached in any racing condition.
Weight
1. Must weigh 2500#. 56% left side weight MAX.
2. All ballast weight must be painted white with car number on it.
Fuel Cell
1. Must have racing type fuel cell encased in an approved steel container or a 1/8” thick aluminum container.
2. Must be securely strapped side to side and front to back. No movement allowed. 2 – 2” x 1/8” straps front to rear around cell.
3. Straps MUST be bolted through with 5/16”” Grade 5 bolts.
4. Must have fuel cell safety hoop extending below bottom of fuel cell, located at least 8” behind cell.
5. Cell can not hang below the rear end housing.
6. NO oxygen bearing additives.
7. GAS ONLY.
Wheels and Lugs
1. 8” MAX. wide. Steel wheels mandatory.
2. At least 5/8” lug bolts and 1” lug nuts recommended.
Driveline
1. Must be painted white with front safety hoop.
2. Steel only.
3. 2” MIN. diameter.
Transmission
1. Automatic, OEM 3 or 4 speed or Bert, Brinn, Falcon type allowed.
2. Must run a steel or cast iron bell housing or aftermarket reinforced aluminum bell housing.
3. Automatics MUST run a steel flex plate scatter shield.
Brakes
1. MUST lock up all 4 wheels.
2. May use racing type master cylinder and pedals.
3. Brake bias adjuster or proportional valves allowed.
4. No shut off valves.
5. No aluminum discs or calipers allowed.
Rear End/Suspension
1. Any non-cambered 9” Ford floater or steel tubed quickchange.
2. NO lockers, tru-trac, goldtrak, etc. allowed.
3. NO aluminum components allowed.
3 Link design.
1. All components must be steel.
2. 1 lower link bar per side.
3. 1 top link bar, solid, spring, or biscuit type, mounted to top center of housing.
4. NO biscuit or spring loaded lower link bars.
5. Front or rear panhard bar allowed.
Multi-leaf design.
1. Springs must be steel.
2. May use dampener shock on top of rear end.
3. Adjustable lowering blocks allowed.
Front Suspension
1. Front suspension must match frame and be in stock location.
2. Must use OEM lower A-frames.
3. Upper a-frames may be tubular.
4. Upper a-frame mounts may be relocated.
5. Any OEM or aftermarket cast iron spindle may be used.
6. NO fabricated or tubular spindles allowed.
7. Spindle steering arm may be drilled to use heim end.
8. OEM inner tie rods must be used.
9. Pitman and idler arm must be OEM.
10. Adjustable aftermarket sway bar may be used on front only.
11. NO adjustable suspension components from inside of driver compartment.
12. Must have collapsible steering shaft or 2 universal joints, which are not mounted in the same plane.
13. Steering box must be OEM in stock location.
14. NO rack and pinion steering.
15. NO aluminum components allowed.
Shocks and Springs
1. Steel shock only.
2. NO coilover shocks, adjustable rate, Schrader valves, external canisters, or aluminum shocks allowed.
3. May be relocated.
4. One shock per wheel.
5. 5” or 5 ½” springs only.
6. $150 claim on any shock of top 4 finisher. Claim must be in writing to tech inspector within 5 minutes of end of race. Claim can only be made
by any driver finishing the feature on the lead lap. Failure to sell, will result in loss of points and payout for that night.
Tires
1. Spec 8” Slick.
2. Initial pre-season purchase of 8 tires allowed and 1 tire per event thereafter.
3. Tires must Durometer read a minimum of 53 at Tech.
4. No softening agents allowed.
Motors
1. OEM cast iron block only. Must have legible OEM numbers.
2. NO aftermarket blocks allowed.
3. 362 ci max.
4. Rear of block must be 72” min. from centerline of rear axle.
5. Flat top or dished pistons, flat tappet cam only.
6. Solid motor mounts allowed.
7. Any collector type header allowed.
8. Wet sump type motor only.
9. Crankshaft centerline MUST be 10 ½” min. from ground.
10. NO lightweight, pendulum cut, scalloped, knife edged, or scalloped rear flange cranks.
11. 1” inspection hole must be in left side of pan, above oil level and in line with crank throw for inspection purposes.
If inspection hole is not available, pan will be removed to tech crank.
12. MUST have radiator overflow catch can under hood. NO ANTIFREEZE, WATER ONLY.
Carburetor
1. 2 Bbl. only. Max 500 CFM. Holley 4412 only.
2. No modifications allowed.
3. MUST have choke horn intact. May remove choke butterfly plate.
4. MUST use an Edelbrock Performer 4 bbl. Intake: GM # 2701 or #2101(discontinued), EPS Vortec Performer #2716
Ford #7181
Chrysler #2915
6. No Performer RPM or Air Gap intakes.
7. May have max.1” thick adapter between carb and intake.
8. Approved adapter #’s: Mr. Gasket #1933
Moroso #364966
Speedway #910-11510
HVH #4412-2
9. Carburetor and adapter gaskets .050” Max. thickness.
10. No other spacers allowed.
11. $500 claim on any carburetor of the top 4 finishers. Claim can only be made by any car finishing the feature on the lead lap.
Claim must be made in writing to tech official within 5 minutes of end of race. Failure to sell, will result in loss of points and payout for that night.
Heads
1. Any stock GM head, except Bowtie Vortec #25534421 & #25534431. 2.02 intake and 1.6 exhaust valve max.
2. No angle milled heads.
3. Max. valve spring diameter- 1.437”.
4. Flat tappet, solid lift cam only.
5. No mushroom lifters.
6. No 1 pc. Shaft type or offset rocker arms. Individual cylinder shaft rockers legal w/ no machining on head.
7. Approved aftermarket heads – GM: Dart-10320010 or 10310010
World-011250 or 011150
RHS-12319 or 12320
EQ-CC200BA
Bowtie-034 only
8. Ford: Any stock Ford head. 2.02 intake and 1.6 exhaust valve max. No angle milled heads.
9. Approved aftermarket heads – World-053040 or E351
Roush-200
RHS-35302
SVO-N351 or N35
10. Chrysler: Any OEM production head with inline valves. No canted valve heads. 2.04 intake and 1.7 exhaust valve max. No W-2 or aftermarket heads allowed.
Ignition
1. MUST be stock type HEI or MSD 6 series only.
2. All boxes and wiring MUST be located out of reach of driver.
3. NO trigger fired or magneto type.
4. Must have working starter.
5. Must have safety stop switch, located behind and to left of driver. MUST be clearly marked and located by track officials.
6. Analog gauges only. No digital gauges or tach.
7. No traction control devices. Noncompliance will result in disqualification, loss of all points, and confiscation of device.
Fire Suit and Helmet
1. MUST wear full SFI approved Auto race suit.
2. Helmet must be at least Snell 90 approved.
3. Neck restraint, SFI gloves and shoes recommended.
4. Suit and Helmet MUST be worn anytime car is on racing surface running above idle speed.
Miscellaneous
1. Mirrors allowed. 1 – 2 ¾” spot mirror and 1 rear view mirror. Must not extend outside
of body.
2. Radios allowed. Frequency must be submitted to official for monitoring purposes.
Must be able to scan in track frequency.
