See Amendment #1 under WEIGHT; 58% left side weight (MAD cars)- (April 30, 2008)

To be eligible for competition, all cars must meet requirements set forth in either the current NASCAR rulebook or R.O.C. rulebook as far as body, chassis, and drivetrain is concerned. The only exceptions will be that the engine, clutch, ignition, weight, wheel, and tire specifications will be replaced with the following:

1. Any overhead valve V-8 American manufactured production engine permitted.

2. Stock stroke and stock bore (+0.60 max.)

3. Maximum compression ratio of 9.0:1.

4. No porting, polishing, or alterations of any kind permitted.

5. Chevy engines must have a maximum stroke of 3.480 and a maximum bore of 4.060. 6. Maximum displacement of 360 cubic inches (+.030 overbore on Mopar) on all engines. 7. Edelbrock Performer PN# 2101 or 2116 for chevy engines. *Check with tech inspector for part # of intake manifold for different manufactured engines*

8. Stock production, cast iron heads (no bowtie or bowtie vortec heads). World Product #4266 and #4267 for Chevy and World Products #5303B for Fords are allowed (part numbers must be visible).

9. Dish or flat top pistons only.

10. Any flat tappet or hydraulic roller camshaft allowed.

11. Stock dimension magnetic flat tappet lifters or hydraulic roller lifters for engine used mandatory. If hydraulic roller lifters are being used, the valve springs may not exceed 1.260 inches in diameter. Retro-fit hydraulic roller lifters are permitted.

12. Roller rockers allowed, no shaft style rockers (unless factory issued) or stud girdles. 13. Stock single point distributor or stock electronic ignition only.

14. No MSD boxes.

15. No automatic transmissions permitted.

16. Multi disc clutch allowed. Minimum disc diameter will be 7 inches.

17. Holley 650 cfm carburetor-Part #4777 or #80541-1 only. Must be bolted directly to intake manifold.

18. GM Performance Crate engine # 602 will be permitted and is subject to tech inspection, regardless of seals.

19. Any headers allowed. (except 180 degree)

20. Mufflers are mandatory.

1. All cars must weigh 2550 pounds minimum and have 56% maximum left side weight, with driver seated in driver’s seat-after race.

Amendment #1: The left side weight percentage for any car running under the former W.T.S. Crate Modified rules, will now be 58%-after race, with driver. The ONLY deviation allowed will be for wheel width. (may run up to 13" maximum wheel width)

1. All cars must maintain a 2” frame height, with driver seated in driver’s seat-after race.

1. Only 15” diameter by 13” (maximum) width five lug reinforced magnetic steel racing wheels permitted.

2. Any offset permitted.

3. Only solid one piece, heavy duty 5/8” magnetic steel lug bolts and standard one inch hex, fully threaded and solid magnetic steel lug nuts will be permitted.

4. No bead lock wheels permitted.

5. Track Tire Mandatory. Call speedway office for details.

NOTE: Enforcement and interpretation of all rules is subject to the discretion of Mountain Speedway officials.

W.T.S. Modifieds must weigh 2600 lbs., maximum 56% Left Side weight with driver in driver’s seat-after race.

M.A.D. Modifieds must weigh 2525 lbs., maximum 58% Left Side weight with driver in driver’s seat-after race.

W.T.S. Stock Clip Sportsman Mods must weigh 2525 lbs., maximum 56% Left Side weight with driver in driver’s seat-after race. May run Holley 4-barrel 650 cfm carburetor, Part #4777 or #80541-1 (bolted directly to intake manifold) and headers with mufflers.

SST Modifieds must weigh 2600 lbs., maximum 56% Left Side weight with driver in driver’s seat-after race.

SST Lite Modifieds must weigh 2525 lbs., maximum 56% Left Side weight with driver in driver’s seat-after race.

SK Modifieds must weigh 2600 lbs., maximum 56% Left Side weight with driver in driver’s seat-after race.

SK LIGHT Modifieds must weigh 2525 lbs., maximum 56% Left Side weight with driver in driver’s seat-after race.

Thompson Sunoco Modifieds must weigh 2600 lbs., maximum 56% Left Side weight with driver in driver’s seat-after race.

Since the goal of this division is to blend a wide variety of limited Modifieds into one competitive class, rules may, from time to time, be adjusted to address over-competitive types of cars. In the event car counts are such that a further sub-division of the class is necessary, steps will be taken to address that situation. This can best be described as a “work in progress” which; with support from interested racers, we are committed to making a success.