OLD DOMINION SPEEDWAY
RMP POWERTRAIN SOLUTIONS
GRAND STOCK
2008 RULES AND REGULATIONS
Version GS2008.A effective 2/2/08 PRINTABLE VERSION - GRAND STOCK RULES
The Grand Stock division is designed to promote a greater interest in Stock Car Racing at less expense than the NASCAR LMSC division. The Grand Stock rules are similar to NASCAR LMSC rules in order to allow teams to prepare themselves for advancement in the sport. Any reference to NASCAR LMSC rule or section within these rules refers to the 2008 NASCAR Rule Book. These rules are subject to amendment at any time when notice has been given. Notice shall be deemed effective within two (2) weeks of the rule amendment and posting of the rule change by Old Dominion Speedway (ODS).
NOTE: In an effort to reduce costs and improve competition for the 2008 season, ODS will run cars meeting the 2008 LMSC or 2008 Grand Stock Rules and Regulations together in a track division to be known as “ODS Late Model.” Performance will be monitored closely and adjustments made as necessary to maintain parity. Engines will be subject to tear-down for tech inspection. 2008 LMSC and 2008 Grand Stock division cars will be permitted to meet the shock absorber requirements set forth in either the 2007 or 2008 NASCAR Whelen All-American Series rulebook.
In 2008, starting inversions for the ODS Late Model division will be based on the average number of points earned by qualified entries over the previous three (3) races. The winner of the last race will start in sixth position. The top qualifiers will then be inverted for the remaining positions with the entry with the highest average in fifth position, the next highest in fourth, and so on. If a qualifier missed one of the three previous events, the inversion calculation will assume win points for that event.
1. Competing Car Models
Open to two door American made passenger car production sedans, 1997 through 2008, that are approved for competition by ODS. No trucks or station wagons allowed.
1.1 Approved Competition Models:
Chevrolet: 1997 – 2008 Monte Carlo
Dodge: 2001 – 2004 Intrepid, 2005 – 2008 Charger
Ford: 1998 – 2005 Taurus, 2006 - 2008 Fusion
Pontiac: 1997 – 2003 Gran Prix
1.2 Only cars registered as Grand Stocks will be allowed to compete in the Grand Stock division.
2. General Body requirements
2.1 Car Bodies: All car year / models listed in the 2008 NASCAR Rule Book, section 20F, must comply with LMSC section 20F-2.1 All other car models must comply with ODS dimensional specifications and LMSC rule 20F-2.1B thru K.
2.2 Overall Car Weight: All cars must comply with NASCAR LMSC rule 20F-2.2. Built motor cars must meet a minimum weight of 3,000 pounds, with a minimum right side weight of 1,350 pounds. Crate motor cars must weigh a minimum of 2,950 pounds, with a minimum right side weight of 1,325 pounds.
2.3 Added Car Weight: See ODS rules for ALL Divisions section 1.2.
2.4 Cars must weigh a minimum of 3,000 pounds with a minimum right side weight of 1,350 pounds (crate motor cars must weigh a minimum of 2,950 pounds with a minimum right side weight of 1,325 pounds) with the following after race weight allowance for fuel and fluids consumed. The weight allowance will be seven tenths (.70) pound per race lap with no tolerance. Half of this allowance will be for the right side weight requirement. In the event of twin races, the weight allowance requirements will apply to each race on an individual basis. Example: Twin 100 lap races, 3,000 pound car. After the first 100 lap race, the car’s minimum allowed weight is 2,930. After the second 100 lap race, the car’s minimum allowed weight is still 2,930 pounds.
3. Detailed Car Body Requirements
3.1 Spoilers: Spoilers and Front air dams must comply with NASCAR LMSC section 20F-3.1.
3.2 Windows, Lights, Mirrors: All cars must comply with NASCAR LMSC section 20F-3.2. This rule governs windshields, Rear Windows and Window Nets. A side-mounted rear view mirror may be installed.
3.3 Dash Panel, Fire Walls, Doors, Fenders, Grilles, Hood, Roof, Rear Deck Lid and Bumper Covers must comply with NASCAR LMSC sections 20F3.3 thru 20F3.10. Flat Hoods Only.
3.4 Identification/Car Numbers: See ODS rules for ALL Divisions section 2.
3.5 Car Body Measurements: Car body measurements must comply with NASCAR LMSC rule 20F-3.12 if the car make / year / body is legal for 2007 LMSC competition. Car body measurements must meet ODS dimensions for all other make / year / body cars eligible per these rules.
4. General Engine Requirements
4.1 The following engines are allowed:
Chevrolet – 350 CID small block V8
Ford – 351 CID Windsor small block V8 ( Cleveland is are not allowed)
Dodge – 360 CID small block V8
(Consult ODS Tech for Detailed Requirements and location)
4.2 Optional Crate Engine - GM part # 88958603 is approved. Crate engines must be purchased and sealed through ODS. Any engine not sealed will not be allowed to race. Engines must remain as they come from the manufacturer.
4.2.1 Paragraphs 5.1, 5.2, 5.3, 6, 7, 8, 9 and 10 apply.
4.2.2 Carburetor: Holley 2300 two barrel carburetor list number 7448 (350 cfm) or Holley 500HP two barrel carburetor (500 cfm). No modifications allowed to carburetor except as specified below:
4.2.3 No drilling or changing of any diameter of air bleeds, metering plate passages, throttle shafts, etc.
4.2.4 No swapping of metering plates.
4.2.5 Choke butterfly may be removed. When choke linkage is removed, all linkage mounting holes must be filled with epoxy.
4.2.6 All vacuum ports/outlets must be removed and plugged with steel plugs or epoxy.
4.2.7 Jets and power valves may be changed. Power valve must be used, No power valve block-off plugs allowed.
4.2.8 Carburetor Spacer: Solid aluminum, .750 inches thick, with two 1 and 11/16 inch diameter holes located in the center that match the carburetor. Except for the larger diameter of the holes, spacer must comply with NASCAR LMSC Rule 20F-5.10.2
4.2.9 Any carburetor held for inspection may be impounded for the week and will be returned the following Saturday at the track upon competitor’s arrival if Carburetor is found to be legal.
4.2.10 Air Cleaner and Air Intake: Air cleaner must be round and may be centered on the carburetor. Cars running GM HEI distributor may run offset air cleaner (Moroso #65925). Paper style filter element only. No devices to control the flow of air within the air cleaner are allowed. Must comply with NASCAR LMSC section 20F-5.12.
4.2.11 Must use distributor that comes with engine from factory. Stock OEM style ignition is permitted.
4.3 Any engine listed above may be used in any eligible car
5. Detailed Engine Requirements
5.1 Engine Location: Chevrolet engine must be located so that the center of the No. 2 spark plug hole is in line with or no more than one (1) inch forward of the center of the right upper ball joint. Ford engine must be located so that the front face/edge of the right side cylinder head is in line with or no more than one (1) inch forward of the center of the right upper ball joint. Center of crankshaft must be located on centerline of frame/tread width. See NASCAR LMSC rule 20F-5.1.
5.2 Engine Height: Engine height will be a minimum of twelve (12) inches from crankshaft center at the front pulley to the ground, measured with driver. See NASCAR LMSC rule 20F-5.2.
5.3 Engine Mounts: Engine mounts must comply with NASCAR LMSC rule 20F-5.3
5.4 Engine Displacement: Engine displacement and engine stroke will be stock for the engine being used with a maximum allowable overbore of sixty thousandths (.060) of an inch.
5.5 Engine Block: The engine block must be a stock cast iron block with an OEM part number. No aftermarket, GM Performance, or Ford SVO / SVT racing type blocks allowed. No angle cutting of block deck.
5.5.1 Pistons: Pistons must be flat top aluminum with two (2) or four (4) valve reliefs permitted. Ring grooves must remain in the stock position.
5.5.2 Connecting Rods: Connecting Rods may be OEM stock rods. No lightning or polishing permitted. Stock rod length and journal diameter must be maintained. Piston pin must be in stock location.
Alternate connecting rods approved for use are Eagle Specialty Products:
Chevrolet - SIR5700BPLW (press fit), SIR5700BBLW (bushed)
Ford - SIR5956FP (press fit), SIR5956FB (bushed).
5.5.3 Deck Height: Minimum piston to deck clearance is zero (0). Piston may not protrude above the block deck.
5.5.4 Oil Pan: Oil pan must comply with NASCAR LMSC rules 20F-5.5.4A and 5.5.4B
5.6 Cylinder Head: Approved cylinder head is a 2 valve, cast iron head, World Products part numbers:
Chevrolet: No aluminum heads allowed. Any stock production cast iron GM head permitted (angle plug or straight plug). Minimum 64cc combustion chamber, Intake Valve size 2.02, Exhaust Valve size 1.60
Ford: 053030-2, 053030 5303B, 5303A (fully assembled) Minimum 58cc combustion chamber Intake Valve size 1.94 Exhaust Valve size 1.60
Dodge: (Consult ODS Tech for Detailed Engine Requirements)
5.6.1 Cylinder Head Modifications: No angle milling of cylinder head block surface or intake surface is permitted. Valve angle in head may not be changed. Cylinder heads may not be ported or polished in any way. No 3-angle valve jobs permitted.
5.6.2 Valves, valve springs and retainers must be steel. No Titanium valves, springs or retainers. No high flow undercut valve stems allowed.
5.7 Crankshaft: crankshaft must be OEM stock cast iron crankshaft with minimum weight of 50 pounds. No steel crankshafts allowed. Polishing or lightening of crankshaft will not be allowed. No knife-edging permitted. Stock stroke must be used. Harmonic balancer must be OEM magnetic steel elastomer type balancer.
5.8 Camshaft, Rocker Arms
5.8.1 Camshaft may be hydraulic or solid flat tappet type cam. No roller cams/lifters. Camshaft lift must not exceed .550 inch measured at valve retainer with valve lash set to “0” lash. Valve lifters and pushrods must be magnetic steel and comply with NASCAR LMSC rule 20F-5.8.2
5.8.2 Rocker Arms may be stock or roller type. Rocker arm ratio may be 1.5 or 1.6. All 16 rocker arms must be of the same model, type and ratio.
5.9 Intake Manifold: The following intake manifolds must be used:
Chevrolet: Edelbrock #2101 (Only current design “Performer” manifolds are permitted. Older design manifolds with the same p/n are not permitted.) Ford: Edelbrock #2181 Dodge: Edelbrock #2176
No angle milling of any surface on the manifold is permitted. No porting or polishing is allowed in any manner.
5.10 Carburetor: Holley 500HP two barrel carburetor (5000 cfm). No modifications allowed to carburetor except as specified below:
5.10.1 No drilling or changing of any diameter of air bleeds, metering plate passages, throttle shafts, etc.
5.10.2 No swapping of metering plates.
5.10.3 Choke butterfly may be removed. When choke linkage is removed, all linkage mounting holes must be filled with epoxy.
5.10.4 All vacuum ports/outlets must be removed and plugged with steel plugs or epoxy. 5.10.5 Jets and power valves may be changed. Power valve must be used, No power valve block-off plugs allowed.
5.10.5 Carburetor Spacer: Solid aluminum, .750 inches thick, with two 1.5 inch diameter holes located in the center that match the carburetor. Spacer must comply with NASCAR LMSC Rule 20F-5.10.2
5.10.6 Any carburetor held for inspection will be impounded for the week and will be returned the following Saturday at the track upon competitor’s arrival if Carburetor is found to be legal.
5.11 Air Cleaner and Air Intake: Air cleaner must be round and may be centered on the carburetor. Cars running GM HEI distributor may run offset air cleaner (Moroso #65925). Paper style filter element only. No devices to control the flow of air within the air cleaner are allowed. Must comply with NASCAR LMSC section 20F-5.12.
6. Engine/Car Electrical Systems
6.1 Ignition System: Stock OEM point type distributor is permitted. Stock OEM style electronic ignition system is permitted. Performance HEI distributor or Mel’s distributor are permitted. Aftermarket electronic ignition systems, MSD or similar, using an external amplifier box, are NOT allowed. Tachometer must be equipped with quick disconnect connector to allow easy removal.
6.2 Spark Plugs: Spark Plugs must comply with NASCAR LMSC rule 20F-6.2.
6.3 Alternator: Alternator must comply with NASCAR LMSC rule 20F-6.3.
6.4 The self starter must be in working order and installed in the stock location. Starter must comply with NASCAR LMSC rule 20F-6.4.
6.5 The battery must be installed in an enclosed battery box. Battery and Installation must comply with NASCAR LMSC rule 20F-6.5.
6.6 Electrical Switches: All electrical switches must comply with NASCAR LMSC rule 20F-6.6 An electrical cut-off switch that cuts off all power to the car must be mounted in the center of the dash that can be reached from both sides of the car and the driver.
6.7 Electrical Wiring: All wiring shall be routed in an open manner, visible, and traceable from termination point to termination point. Taping, wrapping or enclosing wires into looms is not permitted. Bundling and securing of wires is allowed using small CLEAR tie wraps only. Termination blocks are recommended for connecting or splicing wires were necessary. Terminal blocks, if used, must be in the open, visible and easily accessible. Wiring and any accessories must comply with NASCAR LMSC rule 20F-6.7.
7. Engine Cooling System
Engine Cooling System must comply with NASCAR LMSC section 20F-7 except as amended below:
7.1 No electric fans are allowed.
7.2 Stock OEM style water pump only.
8. Engine Lubrication
Engine Lubrication System must comply with NASCAR LMSC section 20F-8. No Accusump systems allowed.
9. Engine Exhaust System
Engine Exhaust System must comply with NASCAR LMSC section 20F-9 except as amended below:
9.1 Car exhaust system shall have one Magna Flow Performance Muffler (part # 12298) installed. The installed muffler will function as a Y-pipe, with the output of each header connected to the dual muffler inputs, and the single output of the muffler connected to the exhaust tailpipe. The specified muffler must remain stock as from the factory. No modifications will be permitted. The muffler outlet flange may not be covered by the exhaust tailpipe and must be visible for inspection purposes. Modifications to this muffler may result in the loss of all points and/or other penalties as deemed appropriate by track officials.
9.2 All exhaust pipe shall be three (3) inch outside diameter and painted white with high temperature paint.
9.3 Tailpipe must turn to face the ground, if the exhaust exits under the car. Alternatively, exhaust may exit through the door above the frame rail.
9.4 Cars must not exceed a 99 db decibel level, as measured by track officials. Sound levels may be monitored anytime cars are on track.
9.5 Exhaust leaks anywhere in the system as determined by track officials will not be allowed and must be corrected.
10. Drive train
10.1 Clutch: Must comply with NASCAR LMSC rule 20F-10.1 except as amended. Carbon fiber clutches are not allowed.
10.2 Flywheel: Must comply with NASCAR LMSC rule 20F-10.2.
10.3. Bell housing: Must comply with NASCAR LMSC rule 20F-10.3. No lightening holes may be drilled or cut into the bell housing. An inspection port measuring 4 inches wide and 3 inches in a front to rear dimension must be cut in the bottom of the bell housing to facilitate clutch inspection. This opening must be covered with a 1/8 thick steel plate measuring 5 inches by 4 inches.
10.4 Transmission: Must comply with NASCAR LMSC rule 20F-10.4 No weight reduction of any type is permitted.
10.5 Driveshaft: Must comply with NASCAR LMSC rule 20F-10.5.
10.6 Rear Axle: Must comply with NASCAR LMSC rule 20F-10.6 except as amended. Nine inch Ford or OEM axle assembly may be used as long as racing axles have been installed. Torque sensitive carriers are NOT allowed.
10.7 Wheels:
10.7.1 Wheels must comply with NASCAR LMSC rule 20F-10.7 except as amended. Wheel width will be eight (8) inches as measured between the mounting beads.
10.7.2 Tire bleeder valves are not allowed.
10.8 Tires:
10.8.1 Tire: The track assigned tire is Goodyear model / compound # D2682. This tire is categorized as a Short Track Special, G19 (slick) tread configuration. No tire conditioner or softener may be used in any manner on tires.
10.8.2 Tire Procedures - Two Tire Rule
10.8.2.1 Grand Stock teams will be allowed to purchase and use two (2) new tires for an event’s qualifying and race(s). Only 2 new tires will be allowed on the car for qualifying/racing for an event.
10.8.2.2 Teams will select their two (2) tires in the tire compound area and have them mounted. Tires will be branded / marked and bar code numbers recorded by ODS officials for identification purposes. Tires used in qualifying and the race MUST have been purchased at ODS and contain the proper ODS brand / mark and bar code numbers.
10.8.2.3 Teams will be allowed to set air pressures and measure tires in the tire compound area.
10.8.2.4 Teams will move the tires directly from the tire compound area to an area designated for GS tires by track officials. Tires should have air pressures set at the level that teams want them to be during impound, before qualifying.
10.8.2.5 Teams will not be permitted to work on the tires after they leave the tire compound.
10.8.2.6 Teams will be told by track officials when they may retrieve tires in preparation for qualifying.
10.8.2.7 Teams must race on the same tires that are used for qualifying.
10.8.2.8 Tires purchased and used for practice may not be used for qualifying/racing.
10.8.2.9 After the completion of the GS feature race(s), teams will remove two (2) tires that had completed the race from the car and submit them to track officials for impound. The bar code numbers on these two tires will be recorded by track officials for identification purposes. These two tires will be impounded at the track until the next race. These two tires will be used for qualifying and racing at the next weekend of racing. If a team does not intend to buy tires for the next race they must submit four (4) tires for impound. Tires should be clearly marked with the team’s car# with tire chalk.
10.8.2.10 In the event of a rainout, tires will be impounded by track officials.
10.8.2.11 On the first night of competition only, competitors will be allowed to buy four (4) tires for qualifying and racing for that night.
10.8 Tires:
10.8.1 Tire: The track assigned tire is Goodyear model / compound # D2682. This tire is categorized as a Short Track Special, G19 (slick) tread configuration. No tire conditioner or softener may be used in any manner on tires.
10.8.2 Tire Procedures - Two Tire Rule
10.8.2.1 Grand Stock teams will be allowed to purchase and use two (2) new tires for an event’s qualifying and race(s). Only 2 new tires will be allowed on the car for qualifying/racing for an event.
10.8.2.2 Teams will select their two (2) tires in the tire compound area and have them mounted. Tires will be branded / marked and bar code numbers recorded by ODS officials for identification purposes. Tires used in qualifying and the race MUST have been purchased at ODS and contain the proper ODS brand / mark and bar code numbers.
10.8.2.3 Teams will be allowed to set air pressures and measure tires in the tire compound area.
10.8.2.4 Teams will move the tires directly from the tire compound area to an area designated for GS tires by track officials. Tires should have air pressures set at the level that teams want them to be during impound, before qualifying.
10.8.2.5 Teams will not be permitted to work on the tires after they leave the tire compound.
10.8.2.6 Teams will be told by track officials when they may retrieve tires in preparation for qualifying.
10.8.2.7 Teams must race on the same tires that are used for qualifying.
10.8.2.8 Tires purchased and used for practice may not be used for qualifying/racing.
10.8.2.9 After the completion of the GS feature race(s), teams will remove two (2) tires that had completed the race from the car and submit them to track officials for impound. The bar code numbers on these two tires will be recorded by track officials for identification purposes. These two tires will be impounded at the track until the next race. These two tires will be used for qualifying and racing at the next weekend of racing. If a team does not intend to buy tires for the next race they must submit four (4) tires for impound. Tires should be clearly marked with the team’s car# with tire chalk.
10.8.2.10 In the event of a rainout, tires will be impounded by track officials.
10.8.2.11 On the first night of competition only, competitors will be allowed to buy four (4) tires for qualifying and racing for that night.
10.8.2.12 Any car found with the wrong tires after a race will be immediately disqualified and the driver penalized 50 points.
11. Frames
Frame must comply with NASCAR LMSC section 20F-11.
12. Suspension
Suspension must comply with NASCAR LMSC section 20F-12 except as amended below. This includes: springs, sway bars, A-Frames, spindles, wheel bearings, hubs, tread width, wheelbase, body height, ground clearance, car height adjustment devices.
12.1 All cars must compete with a wheelbase of 105 inches with a tolerance of plus (+) or minus (-) one half (1/2) inch.
12.2 Whatever bushing material is used in the left side suspension must also be used in the right side suspension.
12.3 Shocks: Must comply with NASCAR LMSC rule 20F-12.3.
12.4 Tread Width: The tread width must comply with NASCAR LMSC rule 20F-12.6. Wheel spacers, if used, must be magnetic steel and the same thickness used on the right and the left sides.
13. Steering Components
Steering Components must comply with NASCAR LMSC section 20F-13.
14. Brakes and Brake Cooling
Brakes and Brake Cooling must comply with NASCAR LMSC section 20F-14.
15. Fuel: See ODS rules for ALL Divisions Section 5.
16. Fuel System
The Fuel System must comply with NASCAR LMSC section 20F-16. This includes: Fuel Cell, Fuel Cell Container, Installation, Fuel Filler, Fuel Cell Vent, Fuel Pump and Fuel Lines and Fuel Fill Containers.
17. Personnel Safety Requirements and Roll Bars
See ODS Rules for ALL Divisions Section 6.
18. Inspections, Protests and Claims
18.1 Pre-Race Inspection: Any pre-race inspection failures or non-compliance with these rules may result in not being allowed to participate or compete in the event. Additional weight or rear of field starts may be imposed. The penalty for inspection failure is determined by the race director.
18.2 Post Race Inspection: Any post-race inspection failure may result in forfeiture of some or all prize money, contingency money and points earned for that event. Any illegal part found will be surrendered to NASCAR track officials. No equipment or part will be considered approved by reason of having passed through previous inspections. Pre-race inspections of a particular part or rule do not preclude post race inspections. The penalty for inspection failure is determined by the race director.
18.3 Protests: No protests will be accepted after ten (10) minutes past the drop of the checkered flag in the Grand Stock feature race. Only drivers finishing in the top 5 positions AND are in the top 5 in the division point standings may file a protest. Only drivers finishing in the top 5 positions AND are in the top 5 in the point standings are subject to being protested. In the final two weeks of the season any competitor protests must be made to an ODS Tech official, who will determine if the protest is allowed. Track teardowns and post race inspections will be conducted as normal including the final night of competition. ODS will retain fifty (50) percent of all protest money. The protesting driver/owner will have the same part/parts inspected on their car. The cost to protest, (teardown fee), particular items is:
Cylinder Heads $200
Connecting Rods $400
Crankshaft $800
18.4 Teardowns: Any driver/owner refusing a request from NASCAR track officials to teardown for post-race inspection or protest for any reason will be placed on a one (1) race suspension. The driver will be held responsible for the refusal to teardown. The driver will lose all points earned for the current event. Refusal to teardown a second time will result in the loss of all points accrued during the season and suspension for the remainder of the current season. ODS track officials reserve the right to teardown at any time.
19. Administration
19.1 All competitors should read/review sections 1 thru 17 of the NASCAR 2008 Rule Book.
19.2 All competitors should read/review ODS General Rules and ODS All Division Rules. Any questions concerning these rules should be directed to a member of the ODS technical crew.
Hayne Dominick, Less Steger, Dave Menefee, Eric Stewart
19.3 Old Dominion Speedway welcomes all of its competitors to an exciting new racing season. Well wishes are extended for a safe, professional and successful racing season.