Chowchilla Speedway Non winged 360 Sprint Cars
(Pit passes are $40 per person, No car entry fee for the July 10th event)
A. 360 Cubic Inches: plus 1% maximum displacement (360 plus 1% = 363.6).
B. No aluminum blocks. No Titanium in engines, excluding valves and valve retainers.
C. Engine Rules are as follows: Legal ASCS spec cylinder head; or 1 7/8" restrictors or an unaltered ASCS intake gasket with any open head.
D. Descriptions are as follows:
1. Spec Heads: Brodix heads part # 27-211, #27223, and #27-222 with ASCS stamp may not have any performance-enhancing alterations in any way. Intake opening no larger than original opening, the only exception being, inlet opening may be ground or polished 3/4 inches, or no further into port than the closest edge of the closest letter of the ASCS logo. During this polishing the left side of the letter "A" is sometimes inadvertently brushed with polish wheel. This is permissible as long as letter is still intact. During polishing of inlet port sometimes polish marks may go slightly further than the 3/4 inch. Intake port at no time may exceed 215 cubic centimeters. Intake port polishing will be allowed no more than 1 1/2 inches below the bottom of the original seat ring on the back side of the bowl area and no more than 1 inch on the short side. Polishing will be allowed in the combustion chamber area to avoid hot spots. Polishing will be allowed in exhaust ports as long as the original "ASCS" logo is not affected or port shape is not altered substantially.
Absolutely no intake or exhaust port relocation, raising, enlargement or reshaping of any type. Valve angle and placement may not be altered in any way on the ASCS spec head. All spec heads must remain within 1 degree of the original manufactured dimensions. ASCS checking fixtures to check the above specifications and dimensions will be used by sanctioned ASCS tracks. Any internally repaired ASCS spec head must be re-certified by Brodix.
All spec heads must remain within 1 degree of the original manufacturing.
Penalty for altered spec head will be subject to suspension, for one calendar year. Forfeit all points and moneys won, during the race which the infraction was found, and subject to a $500 fine that must be paid before reinstatement.
2 .Restrictor size for ASCS legal head:. 2 3/16 inch maximum inside diameter of injector stack - 2.187 at least 3 inches in length. No relief hole may be drilled above the Butterfly on any injector. No Alteration of injector manifold mounting holes will be allowed.
3. Restrictors for all other open head: 1 7/8 inch maximum inside diameter of injector stack- 1.875 at least 2" in length. These injector restrictors will be used with any non ASCS legal spec cylinder heads. An unaltered ASCS Intake gasket may be used instead of the USAC approved injector restrictor. Unaltered means absolutely no modifications to bolt holes or port sizing! No relief hole may be drilled above the Butterfly on any injector. No Alteration of injector manifold mounting holes will be allowed.
E. Electronic or timed fuel injection will not be allowed. Only one injector nozzle per cylinder. No down Nozzle Injectors. No injection nozzles drilled directly into head. No computerized injection. Injection throttle body must have one shaft operated round butterfly per cylinder. Slide or barrel injectors will be not allowed.
F. All oil pans must have inspection plug, pans without plug will be subject to pan removal at anytime.
G. Engines must be normally aspirated.
H. Only two valves and one spark plug per cylinder allowed. No big blocks.
I. All heads must remain within 1 degree of original OEM valve angle. Example: Chevy- 23 degree + or ? 1 degree,
Tires
A. The right rear tire must be a Hoosier RC 3, 102x16x15 or a Hoosier- VRA stamped, 102.0/16.0-15. The left rear tire must be a Hoosier RC 1. Both front tires must be Hoosier sprint car tires with the compound optional. Tires may have optional width and height, except for right rear.
B. Any device(s) used for warming the tires prior to competition is prohibited.
C. Any solvents or chemicals applied to the tire that alter the chemical makeup of the compound or have the effect of altering tire durometer is prohibited.
Any tire that is found to deviate from the original factory specifications will be confiscated.
Absolutely no chemicals to be used on inside or outside of tires. If you need lubricant to your seat your tires on the bead, use soap and water. If any chemicals are detected by smell or visually, the tire will be confiscated and your purse money will be withheld. The tire will then be sent off to a laboratory to be analyzed. If the tire is found to be chemically altered, you will be fined in the amount equal to the amount you have earned in prize money.
All Spec Sprints are invited to compete with the non winged 360 races. Spec Sprints must meet the following criteria; 1700 LBS AT ANYTIME - MIN WHEELBASE 82" - HOLLEY 4412, OR DEMON OR 9647 SERIES 500 CFM 2 BARREL - RIGHT REAR HOOSIER SE15 OR SE25, OR M14, 15, AMERICAN RACER MC3.
For more info go to racechowchillaspeedway.com or e mail me at [email protected]
or call me at 559-972-9036
Purse/Payout
1-1000
2-750
3-500
4-450
5-400
6-350
7-250
8-225
9-200
10-190
11-180
12-170
13-160
14-150
15-150
16-150
17-150
18-150
19-150
20-150
Non transfer pays $50 per car
