HOT STOCK RULES
2013 SEASON
GRAYSON COUNTY SPEEDWAY’S INTERPRETATION OF THE RULES IS:
IF IT DOES NOT SAY YOU CAN; THEN YOU CAN’T.
Hot Stock; Rule Amendment 5/8/12
Spoilers will be allowed.
- Rear Spoiler can be maximum 8″ of material, no more than 5″ above deck lid.
- Spoiler side boards should be no longer than 7″ forward and be confined within deck lid.
- Hot Stocks running under full IMCA Stock Car rules are allowed a spoiler.
-Protruding Air Cleaners
- Minimum of rear half of Air Cleaner Assembly and hole in hood must be covered, no more than 4.5″ above hood.
- No holes in cowl.
- Cowl may cover complete hole and filter assembly.
-Class Option
Must have Decal describing rules package on drivers side front window pillar; No Markers, decal only minimum 4″.
- 350
- 500
- IMCA
Grayson County Speedway reserves the right to inspect any car at any time. No car will be considered as having been approved for safety or legality by reason of having passed through inspection unobserved.
O.E.M. G.M. to G.M., Ford to Ford and etc. will apply except where specified.
CHASSIS:
Cars must be 1960 to current.
Must be stock American made streetcars.
No commercial vehicles, convertibles, sports cars. Car based wagons and trucks will be allowed. Minimum wheelbase will be 107″. No tolerance.
Trucks:
May be built from full size Chevrolet
May move rear axle to top of leaf spring
Must retain stock wheel base and motor location
Must conform to all other applicable Hotstock rules
WEIGHT: Track option to enforce a minimum weight limit of 2,950 pounds, after race with driver in car. No tolerance.
ROLL CAGE:
May be constructed of either 1 ½” x .120 wall for 1 ¾” x .095 wall tubing.
Must be at least four, (4) point cage with two bars going back to rear sub frame.
Must have at least three, (3) bars in drivers side door and steel door plates, 18 gauge or 0.049 inch minimum thickness, must be securely welded to outside of door bars on driver’s side. Plate must cover area from top door bar to frame and from rear down post to five inches in front of seat. Must be visible for inspection.
Roll cage must have proper bracing and triangulation at front and rear bars.
Front and rear sub frames may be tied together.
May run one and three-fourths (1 ¾”) inch tubing from front of roll cage to form a hoop around engine and to be used as radiator support.
May have maximum two horizontal bars, (in addition to bar tying front frame horns together) for radiator protection; must be behind bumper, within confines of body, no wider than OEM frame horns. No heavy bracing of fenders. One (1″) inch pipe maximum and must have rounded corners. No nerf bars.
BODY:
Car number must be minimum four inches thick and 20 inches tall and clearly visible, on both sides, top and back of car, and front, if possible. 1 and 2 digit numbers are advised for 2011and will be maniditory in 2012.
All bodies must retain stock outside sheet metal, doors, doorpost and etc. O.E.M. equivalent steel replacement is OK.
Exterior parts must retain stock dimensions. Exceptions are side skirts and front bumper cover.
All glass, chrome, plastic, door handles and etc. must be removed.
Wheel openings may be trimmed for tire clearance.
Gutting on inside of body will be permitted for roll cage installation.
Body and Chassis may be of different type but must retain parent company. Example: A Monte Carlo body on a Camaro Chassis is OK. A Mustang body on a Camaro Chassis is not OK. All location rules will pertain to the chassis, not the body.
Maximum seven inch metal sun visor may be added to top of windshield opening.
Ground effects/skirting allowed must not extend below bottom of rim or widest part of door.
If an air cleaner protrudes through the original hood, the back ½ of the air cleaner must be totally enclosed. Enclosure is not to exceed 20” in length and width. Enclosure is not to exceed 6” in height. No Cowl type air exits in hood or body panels.
DRIVER COMPARTMENT:
Minimum three windshield bars in front of driver. Aluminum high-back seat only, must be bolted in using minimum 0.375 inch bolts. Seat must remain inside all confines of roll cage and be mounted on left side of drive shaft hump. Entire seat shall be no less than 6” forward of front of rear tire. Driver must be sealed off from track, driveline, engine and fuel cell. Kick and rocker panels may be removed. Front OEM firewall may be replaced using steel fabricated firewall, 18 gauge or minimum 0.049 inch thickness. Top of firewall can be no further back than 12 inches from the back of engine block, measured horizontally. Bottom of firewall can be no further back than rear of oval body mount frame hole. Dash must not extend more than 24 inches back from top of firewall. Dash must be flat, rear can be no higher than front, except for cowl in front of driver. OEM floor pan may be replaced using steel fabricated floor pan, 18 gauge or minimum 0.049 inch thickness, securely welded to frame. Floor pan may be replaced from front firewall to rear halo supports. Must remain flat/OEM appearing from frame rail to frame rail, can be no higher or lower than frame rail. Exception is maximum 8-inch tall driveshaft tunnel. Tunnel must remain similar to OEM tunnel in size. Rear firewall may be aluminum or steel and may be located no further forward than rear halo supports and no higher than bottom of rear opera windows. All holes in firewalls must be covered with metal. No driver-adjustable devices allowed while car is in competition except brake adjuster. No mirrors of any kind. Driver-side window net required, minimum 16 inch by 20 inch ribbon or mesh style, and must be mounted so latch is at top front of window.
FRONT SUSPENSION: All components and mounts must be steel, unaltered OEM, in OEM location and match frame. Rubber, nylon or steel lower A-frame bushings only – no offset or bearing type. No sway bars. Exceptions are: weight jacks allowed – must be in original centerline of spring tower; OEM upper A-frame mount may be moved or replaced with aftermarket steel mount matching upper A-frame bolt on design; OEM or OEM replacement ball joints allowed. For 1978-1987 GM mid-sized metric frame, OEM upper A-frame may be replaced using aftermarket upper A-frame, must display “IMCA approved” decal on top of rear tube of A-frame. Shock location may be moved and may go through center of aftermarket upper A-frame, but frame cannot be altered in any way. Single hole shock mounts only. Speedway motors upper tubular a arm for camaro Item #: 91034397-9 will be allowed in Hotstock. Standard 9″ length ONLY!
STEERING: No rack and pinion. All components must be steel, unaltered OEM, in OEM location and match frame. Exceptions are: bolt on spindle savers allowed, OEM steering column may be replaced with steel knuckles and steel steering shafts (collapsible recommended). Quick release required – steering quickener and steering wheel may be aluminum. – Any steel OEM style manual power steering pump with integrated reservoir may be used.
SHOCKS: One steel nonadjustable unaltered shock per wheel. No coil over, air, or remote reservoir shocks. No Schrader or bladder type valve allowed. No coil over eliminators. One or all shocks may be claimed per event for $50 each.
SPRINGS: One steel spring per wheel only. All coil springs must be minimum 4.5 inches O.D. and non-progressive.
LEAF SPRINGS:
Aluminum lowering blocks ok. Adjustable lowering blocks ok. Leaf spring sliders ok. Multiple vertical hole, adjustable, non sliding, rear spring shackle may be used. Steel Springs ONLY
REAR SUSPENSION: All components and mounts must be steel, unaltered OEM, in OEM location, and match frame. No independent rear suspension. Rubber or nylon control arm bushings only, no offset or bearing type. Welded single-hole shock mounts only. Exceptions are: coil springs may be moved, but center line of axle tube can be no further forward than the front of spring, or no further back than rear of spring; shocks may be moved, but must remain behind housing; lower control arm mounts (maximum 7.5-inches long), on rear end may have multiple holes (maximum of five) for adjustment. Upper control arm mounts on rear end must be level with each other.
REAR END: Any steel approved OEM passenger car or truck non-cambered rear end (housing and carrier) allowed. Safety hubs (floater) allowed. No sway/panhard bars. All components must be steel, exceptions are: lowering blocks, axle cap, and drive flange may be aluminum. No adjustable lowering blocks. One inch inspection hole in housing required. Full steel spool, steel mini spool or welded rear end only. Steel axles only. No quick change devices. One piece drive flange only. No torque-dividing differentials. No scalloped ring gears.
Drive Shaft: Minimum two inch diameter steel drive shaft, must be painted white. Steel slip-yokes only. 360-degree drive shaft loop required and must be constructed of at least 0.25 inch by two inch steel, or one inch tubing, mounted six inches back from front U-joint.
TIRES/WHEELS:
275-60-15 maximum street tire or Hoosier Race tire, G60-15 with IMCA stamped on sidewall.
8” max wheel. Aluminum, composite or steel spacers only. May use IMCA approved bead lock, on right rear only. External, steel bead lock only and it cannot make wheel any narrower than 8 inches and no wider than 8.75 inches. Steel bolts and lug nuts only. Foam type or plastic outer mud cover allowed on right side wheels. Inner mud cover allowed on left rear only. No bleeder valves.
Can groove tires three-eighths (3/8″) inch wide maximum.
No mud or snow tires allowed.
If brand of tire has been ground off it will be declared illegal.
BRAKES, MUFFLERS, SAFETY
See general rules under Safety #12 See general rules under #44 See general rules
ENGINE COMPARTMENT:
Engine must be in OEM location. On GM metric frame, center of fuel pump must be located minimum 1.75 inches in front of cross member (measured at frame). Ford metric frames must have back of fuel pump in front of cross member. V-6 engine must be in OEM location. Frame and cross member may not be altered for engine placement. Engine mount holes cannot be removed or altered on block. Aftermarket engine mounts allowed, including mid-plate. Engine must be OEM appearing, must be able to be used in conventional passenger car without alteration. GM with GM, Ford with Ford, Chrysler with Chrysler. Radiator must be mounted in front of engine. Cooling system may be modified. Overflow tubes must be directed to ground.
ENGINE:
Any American make engine allowed. Steel heads, block and oil pan only. OEM passenger vehicle production block only. No GM Bowtie, Ford SVO or Chrysler W blocks. Castings and fittings cannot be changed, no machine work on outside of engine. No cubic inch limit. Full roller rocker arms allowed. No stud girdles. Flat tappet cam/lifters only. No mushroom lifters. Cannot alter lifter bores. OEM firing order cannot be changed. Steel or aluminum water pumps allowed. ‘Wet’ sump oiling system only. Accumulator allowed – cannot be located between seat and door bars.
Below are the modifications that are allowed.
Aftermarket valve covers – valve cover breathers – screw-in studs – poly locks- aftermarket valve springs – guide plates – claimer oil pans – Reduction pulleys OK
BUMPERS/RUB RAILS:
Maximum one inch wide by two inch tall steel or lexan rub rails allowed – bolted flush to body. Attachment bolts or welds no more than 4 inches from front and rear of rails. Front and rear tow hooks mandatory. All front bumpers must be mounted minimum six inches from front frame horns. Steel bumper mounts only. No sharp edges allowed on bumpers, rub rails or bolts. One of two bumper options must be used and must not be over 10” tall:
OEM: Bumpers not covered by plastic nose or tail piece must be complete, unaltered OEM, capped to fender with steel min 3/16”, welded or bolted. No bars past outside edge of body other than rub rails.
Aftermarket: Fabricated tubular bumpers allowed, must be covered by plastic nose or tail piece and bent to fit with rounded ends. Main bumper bar must be minimum 1.5 inch O.D. (maximum two inch) with 0.083-inch (maximum 0.125 inch) wall thickness on front, and 1.75 inch O.D. with 0.120-inch wall thickness on rear.
FUEL SYSTEM:
Mechanical OEM type push rod fuel pumps only. Racing fuel cell required, maximum 22 gallon, must be in minimum 20 gauge steel container. Must be securely fastened in trunk above top of rear frame rails, with minimum two solid steel straps around entire cell, two inches wide and 0.125 inch thick. No fuel cells allowed over rear end housing. Metal firewall must be between driver and fuel cell. All cell mounts must be steel, securely welded to frame/cage. No adjustable fuel cell mounts. Fuel cell vents, including cap vent, must have check valves. If fuel cell does not have aircraft style positive seal filler neck/cap system – a flapper, spring or ball type filler rollover valve is required. Fuel lines through driver compartment must run through metal pipe or metal conduit. One fuel filter only, cannot be in driver’s compartment. No cool cans. Air cleaner top/stud cannot direct air into carburetor. No top flow air cleaner housings, cold air boxes or air cleaner duct work.
FUEL:
Any gasoline. No alcohol will be allowed.
CARBURETOR/TRANSMISSION/INTAKE/CLUTCH PACKAGE:
Any car less than 112″ wheelbase will run (2) two-barrel carburetor. Any car 112″ wheelbase or more may run any carburetor and will fall under option 1.
All cars must conform to one of the following 2 options. No intermixing of the two options.
Option 1- One, two (2) or four (four) barrel carb (any cfm) with any intake. Carburetor adapter/spacer allowed, maximum 1.20 inches thick, including gaskets. OEM Automatic w/ working converter or OEM manual. Clutch pressure plate must be ten (10″) inches minimum diameter clutch disc must be nine and three-fourths (9 ¾”) inches minimum diameter. No multi disc clutch allowed. No coupling devices permitted. No aluminum or titanium components allowed in clutch or flywheel. Will be checked by magnet. If it does not stick it is not legal, except metallic lining. Corvette or Z28 flywheel will be allowed.
Option 2- Unaltered 350 c.f.m. Holley – part no. 0-80787-1- with no modifications, or part no. 0-7448 which may be modified to meet the specs of part no. 0-80787-1. Holley carburetor components only. Any driver caught with non-350 Holley under option 2 will be fined $500 or suspended for two weeks. Air bleeds cannot be removed, .076 inch maximum diameter. Carburetor adapter/spacer allowed, maximum 1.20 inches thick, including gaskets. Unaltered Weiand GM #7547-1; Ford #7515, #8023 or #7516; Chrysler #7545; Edelbrock GM #2701, #2716; Ford #7121, #7181, #7183; Chrysler #2915 intake No porting, polishing or milling allowed on any intake. Exception is OEM cast iron plenum webbing may be removed, maximum one inch down.
22. TRANSMISSION must have at least two forward gears and one reverse, plus neutral position. With motor running and car in still position, must be able to engage car in gear and move forward, then backward. Only OEM production type transmissions allowed – two speed, three speed, four speed and automatic. No five speed (or more) transmissions, “in and out” boxes, or quick change devices allowed. Functioning shift levers must be in OEM location. Flywheel/flexplate must be bolted directly to end of crankshaft, and pressure plate must be bolted directly to flywheel/flexplate. One flywheel/flexplate only, and all driveline components within bellhousing must rotate consistent with engine RPM while car is in any gear. Unaltered flexplate must be full OEM, or OEM replacement.
Manual: Must be OEM or OEM replacement case and have a working 7.25 inch minimum diameter, steel and/or aluminum, single or multi-disc clutch inside explosion-proof steel bellhousing – minimum 270 degrees around top of clutch/flywheel area.
Automatic: Must remain in OEM or OEM replacement case, with a functioning OEM appearing pump. Aluminum OEM bellhousing may be replaced with aftermarket explosion-proof aluminum bellhousing. Original OEM bellhousing must have approved scattershield constructed of minimum 0.125 inch by three inch steel, 270 degrees around flexplate. Manual bump starts allowed.
GAUGES/ELECTRONICS: No unapproved cameras, transmitting or listening devices. No timing retard controls, or digital gauges (including tach). No electronic monitoring computer devices capable of storing or transmitting information except analog tach. No adjustable ignition control boxes. Only one 12 volt ignition box allowed, must be out of driver’s reach. No additional ignition accessories. Only change allowed to ignition box is one high-end rev-limiter. Setting can be changed through one chip only, or an internal setting inside box. No alternators or magnetos. No electronic traction control devices. Traction control devices will be assessed a $500 fine, loss of points for season and (2) week suspension.
HEADERS:
Headers optional. Must be sealed out of driver compartment and will exhaust at between 0 and 45 degrees from strait down if not exiting under the car. Mufflers see rule in General #47
ENGINE CLAIM RULE:
ENGINE CLAIMING RULES: Refer to IMCA Operations and Inspection Manual or General Rules for claim eligibility requirements.
(A) $550 cash, or $100 and exchange, claim on engine, flywheel and balancing plates ($25 goes to wrecker and $25 to official for each engine). Claimed driver has option of accepting cash, or exchanging engines with claiming driver.
(B) Claim does not include – 1. clutch, 2. pressure plate, 3. bellhousing, 4. headers, 5. carburetor, 6. starter, 7. motor mounts, 8. oil/temp. sending units, 9. carburetor spacer, 10. fan and pulleys, 11. clutch ball, 12. clutch arm, 13. throw out bearing, 14. dip stick, 15. water pump, 16. fuel pump, rod and plate, 17. distributor, 18. plug wires, 19. water outlet and restrictor, 20. breathers.
CARBURETOR CLAIM: Top 4 carburetors are for sale. $300 no swap. Same rules and eligibility as motor buy.
I.M.C.A. rules apply where not specified here.
First refusal to sell will result in loss of all track points for the season, pay for the night plus $200 fine. On second refusal to sell, driver will be suspended for two (2) weeks plus $500 fine. Grayson County Speedway reserves the right to refuse any claim if they feel it is unnecessary or is being used for harassing reasons.
During motor claim ANY un-sportsman-like conduct by either the claimer, claimed, or their crews will forfeit the claim with the offender being fined $200 and suspension of 1-week minimum.
PROTEST:
No protest will be accepted unless in writing.
Protest may be made to Track Official in sufficient time before the feature race to permit driver under protest to be notified of protest.
Protest on the clutch, pressure plate, flywheel and transmission will be $100.00.
Driver must remove parts.
Single protests will be $50.00.
Single items include, body, bumper, roll cage, steering, tires, wheels, carburetor, radiator, ignition, valve train, or other visible items.
Rear end with third member $100; with cover $25