SECTION 14 – SUPER LATE MODEL DIVISION 2009 Revision March 1, 2009 (Refer to section 13 for General Rules) 14-1 CAR BODIES A. The body must be stock, template style only. No Camaro or Firebird bodies, no square corners, no hood scoops, flat sides or any unusual aerodynamics. Weight will be added for any exotic bodies. Five Star Referee measuring device will be used. B. As a general rule, the Five Star Body dimension chart and templates will be followed. C. The body may be steel, aluminum or fiberglass with the exception front fenders must be plastic or fiberglass unless approved by Elko tech staff. D. The rear spoiler must be mounted at rear trailing edge of body or trunk deck. Rear spoiler must be single plane. Maximum size of spoiler; - 5” x 60” (300 sq. inches), 40” maximum height to top of spoiler. E. No holes in hood or fenders to make adjustments. F. Rear window and roof must be braced sufficiently to prevent deflection by airflow. G. The ABC body in its entirety is strongly encouraged, possible weight penalty in the future for non ABC bodies. 14-2 GLASS A. A front and rear windshield is mandatory. B. No side windows. Air ducts are allowed in quarter panel window only. Clear Nacaduct allowed in driver’s side vent window position. A maximum of (3) three one-inch (1”) diameter holes in the rear window. C. Two rear view mirrors allowed. D. Polycarbonate windshield and rear window is required with a minimum thickness of .125” with two window braces. E. All other windows must remain open. 14-3 INTERIORS A. Interiors must be complete and sealed at all times – NO HOLES. B. Floorboard and vertical rise of transmission “tunnel” must be magnetic steel. Floor thickness - .065” minimum. Tunnel thickness 20-gauge minimum. C. Front and rear firewall of the driver’s area must be magnetic steel with a minimum thickness of 20-gauge. D. The interior design must be as clear spaced as possible. No “tub” type interiors E. Interior sheet metal must rise on a plane from the drive shaft tunnel to passenger window opening. F. No “boxed in” or “tunneled” driver compartments. No big spaces between right side door and interior tin that will allow extra air movement. Elko officials will add weight to all cars that utilize this type of interior construction. G. No fuel lines in drivers compartment. 14-4 SEATS & SEATBELTS A. An aluminum racing seat is mandatory. B. A padded headrest is mandatory. 14-5 ROLL BARS (Refer to diagrams at the end of this section) These are the minimum roll bar requirements. A. Material used for the main cage must be a minimum of 1-3/4”diameter magnetic steel round tubing with walls not less than .090” thick. Roll bars must be electrically welded. B. All cars are required to have a rear vertical hoop behind the drivers head, connected to left and right front roll bar legs by a roof hoop. The front roll bar legs must follow the contour of the windshield post and cowl. The rear vertical hoop must be supported by a diagonal bar running from the top left to bottom right, or top right to bottom left. A roll bar must connect the left and right side of the rear vertical hoop at seat height. An “X” must connect left and right frame rails. An additional roll bar must be installed across the bottom of the dashboard, extending from the left front roll bar leg to the right front roll bar leg. Rear support bars, left and right, must extend from the top of the rear vertical hoop to the rear of the frame in the trunk compartment. The front leg bars and rear vertical hoop must be connected on the left side with four horizontal door bars. The door bars on the left side must be convex in shape and spaced from top to bottom as equally as space permits. Top left door bar must be a minimum of 22” to top and the top right a minimum of 18” (measured from top of the frame rail). Door bars must have 6 equally spaced vertical studs. Two angular studs must be attached from the bottom door bar to the mainframe rail. The right side must have at least 4 door bars. Front wedge bar, roof wedge bar, transmission hoop and front hoop are mandatory. Butt welds, joints and connections must have gusset plates for reinforcement. C. Roll bars must be padded anywhere within drivers reach. High-density padding is mandatory. D. Top roll bar and hoop must follow the contour of the roof as closely as possible. The roof hoops at the side of the side window openings must be tight to roof. E. A left door deflector plate and driver foot deflector plate are mandatory – minimum 1/8” thick steel. (Refer to diagram this section.) 14-6 CHASSIS & FRAME A. All frame rails will be a minimum 2” wide x 3” tall. Magnetic steel tubing with a minimum of .083” thick. Rear frame rails must extend to rear cross member behind the fuel cell. B. Rear tail sections may be conventional kick-up or under-slung design; however, a design break must be incorporated in rear tail. C. No drilling or lightening of frame. No aluminum structural parts. 14-7 STEERING A. Any type conventional steering or rack and pinion system allowed. B. Steering column shaft may be supported by mono-ball or heim type pivots. Column shaft must have at least two movable joints for collapsibility, or collapsible telescoping steering shaft. C. Padded steering wheel is mandatory. 14-8 SUSPENSION A. Front suspension must be independent, with coil springs or torsion bars. Any front suspension adjustments must be done from under the car or by lifting the hood. No remote adjustments. B. Ball joints or mono balls must be used on outer end of upper and lower control arms. No rod ends, etc. C. Minimum spring diameter is 5”. Smaller diameter coil over shock units are also permitted. D. Only one shock per wheel, maximum MSRP (manufacturers suggested retail price) is $500 per shock. This price includes and or all parts of the shock including heims etc. The maximum MSRP per canister $250 per canister. No remote adjustable shocks from the driver’s compartment. E. Conventional 3 or 4 link rear suspension only. 1. One spring adjusting bolt per wheel 2. No additional mechanical, electrical, or hydraulic weight shifting devices or wheelbase altering devices. F. No remote adjustable pan hard bar mounts. In other words, it must not be adjustable from the driver’s seat. G. No rear sway bars. H. All trailing arms and 3rd link tubes may have various torque absorbing devices. However, no hydraulic devices are permitted. I. Magnetic steel spindles only. J. Aluminum wide five hubs and steel wide five wheels permitted. 14-9 BRAKES A. Brake system must be conventional hydraulic type. B. Magnetic steel brake rotors only. Floater rotors permitted. C. Must have functional and working four-wheel hydraulic brakes. D. Only one brake bias adjusting unit per car E. No brake fluid re-circulator or fluid pumps. F. Multiple piston calipers, steel or aluminum construction permitted, with a maximum list price of $ 500.00 per caliper. 14-10 WHEELS A. Magnetic steel wheels only. Maximum width bead to bead of 10” B. Minimum wheel weight is 17 lbs. C. Wide 5 wheels and hubs are permitted. D. No bleeders allowed. 14-11 TIRES *See Attached 2009 Tire Rule 14-12 WHEELBASE & TRACK WIDTH A. All cars must compete with a minimum of 103” wheelbase + or - 2 inches. B. Maximum track width center to center: 64” plus or minus 1”. 65” to 66” ADD 25 LBS. You must declare this at pre-tech or prior to qualifying and your car sticker must show the 25 lbs. Over 66” is a disqualification. 14-13 WEIGHT A. Maximum left side for all cars is 58% of total weight. B. Any “crate” or “sealed” motor packages will be handled on a case-by-case basis by Elko tech staff. C. Refer to 2009 Weight Chart at the end of this section for weight selection per engine style and carburetor selection. D. Minimum weights of cars must be met before race or qualifying. Allowance will be made for gas and tire wear for post race weight inspections as standard procedure. 14-14 GROUND CLEARANCE A. All measurements will be performed utilizing the Five Star Referee measuring device. B. Centerline of crankshaft: 10” minimum. C. Fuel cell: 10” minimum. D. Ballast 10” minimum behind rear wheels. E. Minimum of 3” for all other components, except sway bar, lower control arms and exhaust. 14-15 ENGINE Fees for Competition tear down for motor protest are as follows: 1. $100.00 – P&G and compression test any 4 cylinders, rocker arms and push rods. 2. $500.00 – One cylinder head removal an inspection (ports, valves size, Cc’s in head or runners, bore and stroke, visual inspect cam, measure lifter size. 3. $100.00 – Simple connecting rod and crankshaft inspection via inspection holes. 4. $1,000.00 – Remove Engine from car, remove oil pan, check connecting rods and remove crankshaft for weighing. 5. Refer to section 10 of the General Rules for protest procedures. 14-15A TOUR 9 TO 1 MOTORS Refer to 2009 Weight Chart at end of Section 14 for minimum weights and approved carburetors. A. Maximum engine displacement will be 358 c.i. 1. No aluminum, ceramic, or plastic engine blocks. 2. All engine blocks must be magnetic steel, and OEM stock production. B. Magnetic steel connecting rods only - Oil pan access hole, minimum of one- inch diameter, for connecting rod inspection, is mandatory. C. Any style production made aluminum intake is permitted. D. No Chevy heads less than 21 degrees. No Ford heads less than 10°. No Mopar heads less than 18°. E. Roller camshafts permitted. No automatic cam timing devices. F. 5(five) stage maximum dry sump system. G. Must have a maximum left side weight total of 58%. H. Maximum compression ratio of 9.5:1. 1. Compression ratio will be determined by use of “Whistler” test equipment. “Whistler” reading will be final. I. G.M. 9:1 motors must be located so the center of the forward most spark plug hole is no more than two inches (2”) rearward of a line between both lower ball joints. Ford and Mopar motors will utilize a 4” measurement. 14-15B ACE MOTORS All blocks must be magnetic steel and O.E.M. stock production. Refer to 2009 Weight Chart at end of this Section for minimum weights and approved carburetors. A. Must have a maximum left side weight total of 58%. B. Ace Cylinder Heads 1. Only BRODIX ACE cylinder heads may be used. All cylinder heads must be registered with Elko Speedway. Must be able to sell cylinder heads complete for $2,300.00 (set). (Hardware/valves, valve springs, retaining keepers and glide plates) Coating of the cylinder heads is prohibited. Cylinder heads must be unmodified. Machining, cutting, grinding, abrasive blasting, or any alterations to the cylinder head is prohibited. A three-angle valve job is permitted. No cutting down or reshaping of the valve guides is permitted. Exhaust port matching is prohibited. Intake port matching is prohibited. Use of titanium valves is prohibited. Valve stem diameter may be 11/32 or 5/16 inch. Only the following valves may be used: Engine Manufacturer Intake Exhaust GENERAL MOTORS/FORD BRODIX BR81019 BR81621 Engine Tech BR810198 BR81621 FERREA F1121PF1476P MANLEY 11818 11595 REV CL-1643 CL-1604 CL-8003 CL-1171 CHRYSLER CORP. BRODIX BR60029 BR60037 C. The maximum allowable spring diameter is 1.570 inches. Steel or titanium valve spring retainers are permitted. Cylinder heads may have one extra water line per head. Metal valve covers only (no special materials). No shaft rockers allowed except on Mopar engines. D. Maximum 4-stage oil pump. E. Any production intake manifold allowed. Maximum cost of $375.00. F. No additional material may be added to manifold. No polishing or grinding to any part of the manifold—except you may match port runners a maximum of 1”. H. Ace Pistons 1. Any flat top, dished, or inverted dome piston may be used. Valve reliefs may be cut into pistons. (Maximum compression ratio is 10.8 to 1 (10.810 is illegal). Maximum engine displacement for GM and Ford is 358 c.i. Mopar is 360 c.i. Minimum engine displacement is 350 c.i. for GM, 346 c.i. for Ford and Mopar. I. Ace Camshaft 1. Roller cams are allowed in 2BBL engines. The maximum lift is .625. The duration rule is 270 at 50 thousands. No mushroom type lifters, no in- layered cams. No rev kits, no roller bearing camshaft journals. The maximum rocker ratio is 1.6 to 1. Only steel push rods. J. Ace Connecting Rods 1. Only approved steel rods allowed. Rods using 3/8” bolts permitted. K. Ace Crankshaft 1. Standard and steel type only with minimum weight of 43 lbs. No lightweight, knife-edge, under cut counter weight crankshafts permitted. No Honda journals. Stroke 3.4 min. to 3.5 maximum. Minimum 1.98 rod journals. No journals under factory dimensions. L. Ace Inspection 1. A 1.5” plug must be installed in oil pan and windage tray. The hole must be directly under the rod journal. Cylinder head removal and in pounding may be required. M. GM Ace motor must be located so the center forward most spark plug hole is no more than two inches (2) rearward of a line between both lower ball joints. All Ford and Mopar Ace motors will use 4” measurements. 14-15C ELKO CONCEPT MOTOR – Can be either 9.5 or 10.8 compression ratio. A. American made production V-8 engines only. (No V-6 or 4 cylinders.) B. Must be production cast iron O.E.M. block with standard external measurements in all respects with the exception of the permissible .060 maximum overbore. C. Maximum cubic inches: 360.4 GM, Ford 362.5, and Dodge 370.8. D. No aluminum blocks - stock production steel only. E. No removing of identification numbers. F. Crankshaft 1. Minimum 48 lb. sportsman type magnetic cranks only for 10.8 to 1 compression. Lighter crankshafts permitted but will have to use 9.5 to 1 compression ratio. 2. Unaltered except for normal clean up and balancing. G. Rods 1. Magnetic, forged sportsman type connecting rods only. 2. No titanium, no aluminum, no H-beam rods. 3. 6” maximum length for 10.8 compression. Longer rods will have to use 9.5 to 1 compression. 4. 560 grams minimum weight for 10.8 compression. Lighter rods will have to use 9.5 to 1 compression. 5. Competitor teardown protest for crank and/or rod tech is $1000.00. Refer to section 10 protest procedures. H. Pistons 1. 10.8 compression ratio motor is required to have flat top pistons. Reverse dome piston may be used on 9.5 compression ratio motor. 2. Valve relief may be cut into piston. 3. No portion of the piston may protrude above the top of the block. I. Camshaft/Valve Train 1. A maximum valve lift of .625 measured at the valve with valve lash as run. 2. Roller Cam shafts permitted. 3. No Automatic Cam timing devices. 4. No belt drive Cams. 5. Roller lifters permitted. Maximum manufacturer retail value of $400.00. 6. No gun drilled or titanium valves. Titanium retainers are permitted. 7. 1.7 is the maximum permissible rocker arm ratio. J. Heads 1. Cylinder heads must be a stock steel O.E.M production only. 2. Limited to two valves per cylinder. 3. Combustion chamber intake and exhaust ports must be original "as cast" configuration. 4. Three angle valve jobs allowed. 5. Any evidence of any sanding, polishing, relieving, grinding, porting, chemical treating, ceramic work, abrasive blasting, alteration to the original form or the addition of material to the ports or combustion chambers is strictly forbidding. 6. No external sanding, grinding, or removal of ID numbers or symbols. 7. Valves must be in stock location with a minimum diameter of 5/16”. 8. Maximum valve diameter measured across the face, intake 2.02”, exhaust 1.60”. 9. No chemical or ceramic work in internal area of intake manifold or heads. 10. Maximum compression ratio as measured on the "whistler". K. Intake Manifold 1. Aluminum intakes unmodified in anyway must be production made dual plane design with a maximum height of 7”. Maximum suggested retail of $350.00. L. Oil System 1. Aftermarket oil pans and breathers allowed. 2. Oil pump must remain in stock location. 3. Single stage external pump as O.E. replacement on Ford only. 4. No dry sumps. 5. Oil coolers allowed outside of driver's compartment only. 6. 3/4” pipe plug inspection hole must be installed for inspection purposes on oil pan. The hole must reveal a center rod journal. 7. If windage tray is used, an inspection hole must be provided through it. 8. "Aeroquip" type lines only. 9. No vacuum pumps. M. An Elko Concept Motor must be located so the center of the forward most spark plug hole is no more than 4” rearward of a line between both lower ball joints. Elko Concept Motor must utilize a clutch with minimum diameter of 71/4” and a traditional ring gear and starter. 14-15D A.S.A. Crate Motor *Please Note: The concept of crate motors is new and yet, in the opinion of Elko Speedway in a state of constant change. Elko Speedway will do everything in its power to prevent any crate motor from having an advantage over the rest of the competition. A. All motors must be purchased from an approved A.S.A. motor builder. All motors must have all seals undisturbed as received by the approved A.S.A. engine builder. B. Competitors using this style of motor built exactly as approved by A.S.A. will compete at 2,750 lbs. with a maximum 58% left side weight. Providing these motors make less than 430 h.p. Elko Speedway will add weight to any A.S.A. crate motor package that it determines exceeds this amount of horsepower. C. Elko Speedway officials will inspect rocker arm ratios, cam lift and maximum motor r.p.m. Please be aware that rocker arm ratios and cam lifts vary on crate motors even among the same manufacturer. Tech officials will, to the best of their ability, determine what the permitted ratios and lifts are. It will be up to the individual competitor to verify with the tech officials prior to competition what the legal ratios and lifts are for their particular motor. 14-16 CARBURETION - See also 2009 Weight Chart at the end of this section A. Holley #4412 – 500 CFM two (2) barrel specifications: 1. Body of Carburetor: a) Venturi size of 1- 3/8” and maintaining a throttle bore maximum size of 1-1/16”. b) No polishing, grinding or drilling of holes. c) Gasket surfaces may be machined for improved sealing. d) Any attempt to pull outside air other than what flows through the venturi is not permitted. 2. Choke: a) The choke may be removed; all remaining holes must be sealed. 3. Choke Horn: a) Choke horn may not be removed. 4. Boosters: a) Boosters may not be changed. Size and shape must be OEM unaltered. b) Height and location of booster must remain in OEM location. 5. Venturi: a) Venturi must be OEM unaltered. Casting ring must not be removed. 6. Base Plate: a) Base plate must be OEM unaltered. 7. Butterflies: a) Butterflies must be OEM unaltered. b) Idle holes may be drilled in butterflies. c) Butterfly screw ends may be cut even with shafts, but screw heads must remain OEM size. 8. Throttle Shaft: a) Throttle shaft must remain OEM unaltered. 9. Jets: a) Jets may be changed. No dial-a-jet devices. Cold air boxes allowed. Maximum air box opening size 3” X 24”. Hood must seal at windshield intersection. Must be a 1” space between the windshield and air box opening. No protrusion above hood line. No devices for directing air flow into the air cleaner. B. Stock Holley 750 CFM 4 bbl carburetor – only permitted on Elko concept motor. 1. Standard boosters only and must be tightly mounted. Epoxying or safety wiring of boosters is recommended. 2. Air horn may be removed. No other visible modifications allowed on carb. 3. No vacuum leaks. No turtles or other induction performance enhancing devices. No other systems allowed. 4. Two (2) return springs mandatory. An over center throttle stop is recommended. 5. Maximum height for spacer is 1”. Spacers must be “open” style with a gasket thickness of 1/8” max for top and bottom gaskets. 6. Cold air boxes not permitted when utilizing the 750 CFM carburetor. Maximum hood opening size 3” x 24”. Hood must seal at windshield intersection. Must be a 1” space between windshield and hood opening. No protrusions above hood line. 7. Maximum 4” element allowed. C. Carb Spacers 1. 9 to 1 and Ace motor – Maximum 1” thick only open style or straight bore 2 barrel. (No tapers). 2. Elko 750 4-barrell spacer must be 1” thick maximum and have a single open hole. 3. 2 barrel Elko and Raceway Park motors – 1 ½” thick aluminum only, any design D. No High Performance carburetors allowed. 14-17 FUEL A. Approved fuel cells required- 22-gallon maximum mandatory. Fuel cell must be centered in the frame rails. B. All competing cars must have an approved fuel cell in a minimum 20 gauge steel can. C. All cars must utilize a 100% mixture of the “track brand fuel” as mandated by Elko track officials. Visiting cars may be granted an exception to this rule if permitted by tech staff. 14-18 EXHAUST AND MUFFLERS 14-18A TOUR 9 TO 1 OR “ACE” MOTORS. A. Cars must use an effective muffler system. Elko officials will make the determination if the cars exhaust is too loud. A car cannot exceed 95 decibels at 100 feet. B. The exhaust must exit behind the driver, underneath the car, pointing towards the ground. C. Ace motors must follow Ace motor exhaust rules completely, unless Elko officials modify rules to minimize noise problems. D. The exhaust may exit through the passenger side door if one of the following magna flow mufflers are used: 14161, 14163, 14151, 14153. These mufflers cannot be altered in any way. 14-18B EXHAUST & MUFFLERS – ELKO CONCEPT MOTOR REQUIREMENT A. Exhaust must exit behind driver, underneath car, pointing toward ground with a max turndown length of 6”. B. Mufflers required. Car cannot exceed 95 db at 100’. Required is Brzezinski #184, or Walker #21467, Nelson Co. #86150M C. Steel tube exhaust headers to be allowed: maximum diameter of steel tubing 1- 5/8” measured on the outside. All headers to be manufactured by an exhaust header manufacturer (No homemade, custom or one-of-a-kind headers). No step type, reversion, anti-reversion, venturi, and multi-sized headers. Coating of header is permitted. No stainless steel headers. Header or exhaust wrap is permitted. D. Maximum size of collector 3”, no velocity or cone style collectors. Headers may be of under chassis or crossover style. No 180-degree style, no merged tubes from side to side of engine. E. Maximum size of tubing from collectors - 3” outside diameter. May have either dual exhaust with two mufflers with a maximum inlet/outlet tubing size of 3” or 2 into 1 Y style exhaust. Single exhaust tubing maximum outside diameter - 3- 1/2” from Y to muffler and through muffler and tailpipe F. All cars may have only one merge, X pipe, or Y pipe. X pipe and merge pipes no larger than 3” inside. G. No reversion, venturi, anti-reversion, or step pipes or tubes in any exhaust piping or system on any car. H. Only one exhaust gasket per side I. Mufflers must be hung at both ends with two hangers and two clamps per muffler. J. The exhaust may exit through the passenger side door if one of the following magna flow mufflers are used: 14161, 14163, 14151, 14153. These mufflers cannot be altered in any way. 14-19 COOLING SYSTEM A. Any Radiator allowed. Must be mounted forward of the motor. 14-20 ELECTRICAL SYSTEM A. Reversed mounted starter permitted in Chrysler application only. This applies to Elko Concept Motors only. B. Only two (2) MSD type ignition boxes per car C. Crank Triggers are not permitted. D. Absolutely no traction control devices permitted. Any competitor using these devices will be dealt with severely. 14-21 CLUTCH A. Clutches with diameter of 5-1/2” or greater may be used with the exception of; Elko Concept Motors must use a minimum 7-1/4 diameter with traditional ring gear and starter. Elko tech officials will evaluate clutches smaller than 5-1/2” on an individual basis and add weight penalty if necessary. B. Operable clutch must remain in bell housing. C. Safety steel scatter shield bell housing required with stock clutch. D. No carbon fiber or composite material clutches. 14-22 TRANSMISSION & DRIVELINE A. Manual transmission with at least 2 forward gears and reverse operable at all times. No bottom load transmissions. B. One-piece magnetic, steel drive shaft (2-1/2” minimum O.D.) or aluminum (3” min O.D.) drive shaft with at least one 360-degree safety hoop mandatory. Drive shaft must be painted white. No carbon fiber drive shafts. C. Any closed tube conventional rear end acceptable. Steel axle tubes required except on completely legal A.S.A. late model series cars. (Not legal for A.S.A. late model tour cars). D. Cars utilizing Elko Concept Motors must have solid magnetic steel axles only. No gun-drilled or hollow axles. E. One-piece magnetic steel or aluminum drive plates. F. One-inch access hole in-line with the flywheel ring gear mandatory. This will be used when whistling and checking cam lift. If Officials cannot efficiently make use of this access, driver is responsible for rotating engine by hand – hot or cold – at request of Officials. If this cannot be complied with, car and driver will be disqualified. G. If a two-speed transmission with integral clutch is used, it shall be valued at a maximum of $1500. A two- speed transmission is not permitted when using the Elko concept motor. H. Axle tubes, rear ends, space plates, etc. cannot be cambered more than one degree measured with the rear axle level. 14-23 MISCELLANEOUS A. Two-way radios are optional. B. All teams must have working scanners tuned to the track frequency of 461.200 MHz during races, with either crew equipped with two-way radio to driver or driver listening. C. All drivers must register their radio frequency with track officials. Those frequencies may be monitored. Inappropriate communication may result in fines, suspensions or both. D. Elko Speedway uses automatic timing and scoring for the Super Late Model Division. Each car must purchase or rent an AMB transponder. Transponder mounting location for the Super Late Model Division is 13 feet back of the forward most point of the front bumper of the car. The transponder/transponder clip must be securely mounted to the frame with a clear sight line to the racing surface. 2009 Weight Chart 390 CFM 4 Engine Style 500 CFM 2 BBL 750 CFM 4 BBL BBL Raceway Classic Motor 2700 N.P. N.P. Elko Speedway Concept 2700 2825 N.P. Ace Motor 2750 N.P. N.P. Tour 9:1 2800 N.P. N.P. ASA Crate Motor 2750 N.P. N.P. Notes: 1. N.P. = Not Permitted 2. Raceway Classic Motors and Elko Concept Motors must follow their engine rules exactly. No hybrids. 3. No weight penalty for Ace Motors utilizing merge collectors. 4. Raceway and Elko Concept Motor utilizing the 500 CFM 2 bbl can use an air box but with a maximum of 1-1/2" thick aluminum spacer. These holes can be flared. 5. All cars can have a maximum of 58% left side weight. 6. Elko concept motors utilizing 750 4 bbl cannot use an air box and must have a 1” thick maximum open style spacers. 7. All Weights are pre-race weights. ***PLEASE NOTE*** The above weights were established through a consensus of the Track Owners throughout the region. The intent of these weights us to provide equal competition among the motor packages. Track Officials reserve the right to make weight adjustment to any motor package that appears to have an advantage. We suggest you utilize the motor package that makes the most economic sense for you. If you are a new competitor or a current competitor looking to change motor directions we recommend the Ace motor package.
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