Special thanks to Richie Grodski at "The Chrome Horn"
________________
Speedway
Info
Mountain Speedway is a 1/3 mile asphalt oval located in the beautiful
mountains of northeast Pennsylvania. The speedway hosts exciting stock
car racing every weekend from April to October, making it one of NEPA's
premier entertainment attractions.
read more
Mountain Speedway
Mill Mountain Road
St Johns, PA 18247
full
directions & map
(570) 788-7544
Mountain Speedway
is available to rent
to any team interested in testing their cars. To
schedule a date and time please call
the track office at (570)
788-7544.
2011 MOUNTAIN SPEEDWAY SPORTSMAN MODIFIED RULES
SPECIAL SCANNER INSTRUCTIONS: All drivers must monitor scanner system and obey line up and the Race Director’s instructions. This may be done in place of, or in conjunction with driver/crew radio communication but in all cases it will be the driver’s responsibility to monitor the scanner system. All radios must be programmed so that scanner system overrides communication with crew. In situations where this is possible, scanner must be onboard race car. All instructions will be repeated once. If action by driver is not taken immediately, the car will be black flagged and placed to the rear of the field.
NOTE: Two-way radio privileges may be suspended on an individual basis if radio communication is abused in any way.
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 drive train is concerned. The only exceptions will be that the engine, clutch, ignition, weight, wheel, and tire specifications will be replaced with the following:
Cars in this division have the option of utilizing different engine combinations from similar divisions at various other racetracks. The engine rules detailed in section A apply to the home track engine at Mountain Speedway. All other engine combinations use rules based on each individual tracks’ rulebook. In order to blend these engine combinations together as fairly as possible, some deviations from each tracks’ rulebook are allowed. These deviations are detailed in section B of the Engine rules. Obviously, if your engine is legal at any of the other listed tracks or series, it will be legal at this speedway-as long as weights and left side percentages are adhered to. In many cases, additional modifications may be allowed as detailed in section B.
A. Mountain Sport Modified ENGINE (Including clutch, ignition, and carburetor)
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. No minimum weight for crankshaft or connecting rods.
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 bow tie or bowtie Vortec heads). World Product #4266 and #4267, Engine Quest: CH 350C, CC 170BA, CC 170 BA2, CC 167 CS2, CC 167 CS, CC 167 ES2, CC 167 ES and Dart: 100-210-70, 100-210-10, 100-242-66, 100-243-65, 100-263-64, 100-243-70, Pro Topline #2236494906, 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 1.300 inches in diameter. Retro-fit hydraulic roller lifters are permitted. No modifications or shimming of hydraulic roller lifters allowed.
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)
B. OTHER ENGINES -
1. SST type cars may use DART Iron Eagle 200 cc Platinum head.
2. SST type cars may use Edelbrock Performer RPM intake manifold, Part #7101, but will be required to add 25 pounds to minimum weight.
3. SST type cars may use any 1-inch carburetor spacer.
4. SST type cars with 12:1 compression ratio must add 100 pounds to minimum weight
5. Wall Stadium Spec engines must use a one-inch maximum straight hole carburetor spacer.
ALL ENGINES
1. Oil pans on all cars may be constructed of steel or aluminum.
2. All cars must use wet sump oiling systems. All oil pumps must mount in stock position.
3. NO vacuum pumps permitted on any engine.
4. No minimum journal diameter for main bearings or connecting rod bearings. This applies to all cars in this class, regardless of series or track affiliation.
5. All engines will be subject to inspection by Mountain Speedway officials. If necessary, seals will be removed as part of the inspection process.
All “Other Eligible Cars” must meet all rules and requirements of their claimed home track’s rule book (including Carburetor). Interpretation of these rules is subject to the discretion of Mountain Speedway Officials. These cars must declare track/series affiliation at time of registration.
FRAME HEIGHT
1. All cars must maintain a 2” frame height, with driver seated in driver’s seat-after race.
WHEELS AND TIRES
NOTE: Track tire will be required for all cars. Call speedway office for tire info.
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.
TRACK WIDTH
1. Maximum width of 83 ½ inches-measured bead to bead.
WEIGHT
1. All cars (Mountain, Wall, SST, SK, Thompson-Sunoco) must weigh 2600 pounds minimum and have 56% maximum left side weight, with driver seated in driver’s seat-after race.
***(unless specified below)***
Wall Stadium Spec Engine Modifieds - Wall Stadium Modifieds with Wall spec. engine must weight 2675 lbs., maximum 56% left side weight with driver in driver's seat-after race.
Wall M.A.D. Modifieds, SST Lites, SK Lights must weigh 2525 lbs., maximum 58% Left Side weight with driver in driver’s seat-after race.
Wall Stadium Stock Clip Sportsman Mods must weigh 2525 lbs., maximum 58% 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.
CLUTCH - All “Other Eligible Cars” may use a multi-disc (made for racing) clutch. Minimum disc diameter will be 7 inches.
AXLES - NO TITANIUM AXLES ALLOWED IN ANY CAR.
MUFFLERS/HEADERS - Mufflers are MANDATORY on ALL cars. Headers on all cars may be constructed of steel or stainless steel only.
SPOILERS - For all cars, spoiler must be a maximum of 8 inches high by a maximum of 48 inches wide. The rear spoiler may not extend past the rear edge of the rear bumper at any time. A maximum of 35 ½ inches, measured from the ground to the spoiler mounting point-will be permitted. Rear spoiler must be solid clear polycarbonate (minimum ¼ inch thick). No lettering is allowed on spoiler.
NOTE: Enforcement and interpretation of all rules is subject to the discretion of Mountain Speedway officials. All Mountain Speedway gauges, scales, and measuring equipment will be the absolute last word in any and all disputes.
GENERAL
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.