2018 Rules

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Posted January 8, 2018

USRA Modifieds

USRA B-Mods

Legend Cars


Pure Stocks
2018 Updates-
New Style Fuel Cell or Flapper Valve Update Lid (Speedway Part Number 458-315)
Pedals in Stock Location NO Extensions
New Style Chip Box (Part Number ct8727) 5800 RPM Max Limit


COMMUNICATIONS:
All competitors must have raceciever 1600 in car radio to compete
Bodies:
Minimum 108 inch wheelbase, except 1983 or newer t-birds or Chrysler products may be 105 inch wheelbase. Any year American made production car. All cars to remain stock. Full frame cars may remove inner fender wells, unibodies may not. Bumpers must remain stock with no bracing outside frame horns. Radiator may have protection bar. Steering column may be stock or fabricated with removable steering wheel. Car may be stripped, stock fire wall from front to rear with all holes patched, no mirrors, must have safety bars or screen over driver side windshield. Hood fenders, and bumpers required. Engine hoop and snout bars allowed. NO SPOILERS. No enclosed interior.
Cage:
Must have at least 3 left side and 2 right side door bars, 4 up right bars, cross brace behind driver, middle bar in top, down bars off rear of cage going through rear fire wall into trunk ok, must not connect to rear bumper. Tubing must be round & at least 1.5 inches in diameter .095 wall minimum thickness.
Engine/Motor:
Stock motor, stock location, stock solid motor mounts in stock location. Must be same make as car. New Style Chip Box (Part Number ct8727) 5800 RPM Max Limit.
Size of engine: Max. compression 9 to 1
350 gm .060 max.
351 windsor ford .060 max.
360 chry. .060 max.
Harmonic balancer on GM 8 inch minimum.
Smaller engine allowed no stroker engines allowed!!!!!!!!!
Stock Balancer ONLY. No Modifications, No Lightening (Min Weight 10lb 8oz)
Heads:
GM OEM approved head numbers are: 14079267, 3986336, 3986339, 3986339X, 3986388, 3932441, 376445, 3928454, 3932454, 3876487, 3973487, 3973487X, 3973493, 3951598, 468642, 330862, 333882, 3998920, 3998991, 3998993, 3998997, 3970126. Maximum size valves on these heads are 1.94 inch intake and 1.50 inch exhaust. No performance heads (no double humps, no 292 castings, no LT1, no bowtie, no center bolt valve cover, or aftermarket allowed.) Porting or polishing, screw in studs with shoulders, or guide plates are not permitted.     305 heads on 305 only!!!!!! No bee Hive or high performance valve springs.
Camshaft:
Hydraulic camshaft only, must pull at least 15 inches of vacuum, no tolerance. 430 maximum lift at valve, stock 1.5 ratio rockers only, no tolerance. No roller cams ,no roller tip or roller rockers allowed.Stock Type Lifters, NO HP. Must have stock wire clip!


Crankshaft and rods:
Stock appearing, no light weight cranks. No H-beam rods. Press fit rods only, 5.7 rod on GM maximum. Aftermarket Eagle, Scat, stock type ok. 3.48 maximum stroke. No lightning of any kind to crankshaft.
Intake manifold:
Stock cast iron, no aluminum, no bowtie, ford d5 or newer chrysler no high rise. Intake must be unaltered.
Carb:
4412 Holley only 2bbl, no modifications. Except jets and choke removed. No modifications to choke tower. Carb. must have vacuum ports for testing vacuum. Carb subject to claim by any driver in a feature in lead lap with winner. Claim is 250 dollars outright or 125 dollars exchange. Failure to sell /points and finish for the night ,2 week susp. And 50 dollar fine paid to a charity before returning to race. No electric fuel pumps /stock man. Pump only. Spacer plate for carb. From intake to carb only /claim $25 outright /$15 exchange. Carb. spacer must remain same front to back max. 1 inch , no taperer spacers.
Exhaust:
Stock cast iron exhaust manifolds only (no 2 ½ in ram horn no lt1 no high performance) 2 inch od pipe must extend past driver.
Pistons:
Flat top 4 valve relief only. Hypereutectic 4 valve relief ok. No JE, Ross, or ect. No high performance.
Radiators:
Aluminum radiator ok, aluminum pulleys ok , Aluminum water pumps ok. 
OIL PANS:
Racing style oil pans allowed. Must have 1” inspection hole above the oil line on the driver’s side. Failure to do so will result in removal of pan for tech. inspection. No aluminum oil pans.
Transmission:
OPTION 1 :All forward and reverse gears must be operational, plus a neutral position. With engine running and car in still position, driver must be able to engage car in gear and move forward, then backward. Only OEM production transmissions allowed. No ‘in and out’ boxes or quick-change devices allowed. Functioning shift levers must be in OEM location. One steel or aluminum OEM style/size flywheel allowed, must be bolted directly to end of crankshaft.10.4 IN MIN. CLUTCH STOCK APPEARING PRESSURE PLATE MUST WEIGH MIN. OF 15 LBS. Pressure plate will be weighed by itself. STOCK SPRING TYPE DISC NO SOLID HUB.A MIN. OF 15 LB. Flywheel will be weighed by itself. Must be unaltered three or four speed in OEM production case. No five (or more) speeds allowed.  Must have working clutch inside explosion-proof steel bell housing with one hole for throw out bearing lever or hose, must be 270 degrees around top of clutch and flywheel area ,NO  MINI-CLUTCH ALLOWED.NO RACING CLUTCHES.   Components must rotate, consistent with engine rpm, while car is in any gear.  No Bert, Brinn, or Falcon type transmissions allowed.
OPTION 2:Stock automatic transmission with full size working torque convertor
No Power Glides,3 Spd Automatics only no TCI CNR, ETC. TYPE TORQUE CONVERTORS Mandatory must have approved scatter shield constructed of minimum 0.125 inch by three inch steel, 270 degrees around flex plate. Only external lines allowed are for transmission cooler.
Claim on torque convertors $75.00

REAR ENDS:
Stock for car, may be locked, Any gear ratio allowed. Rear trailing arms must be stock. No shortening or lengthening of trailing arms. Pinion angle must remain stock. Leaf spring cars must have plates welded to axle tubes to prevent pinion angle from moving. May use 9" ford or stock rear-end. Trailing arms must remain stock for frame being used and be in stock location on chassis Gm to Gm- Ford to Ford etc.
SUSPENSION:
All components must be stock OEM for make and model no moving brackets or shortening lengths. OEM bushings only. No steering quickners, weight jacks, or spring spacers.
Shocks: Stock mount/Stock Appearing racing shocks allowed. No heim end or adjustable. No take apart shocks/mono tube only.
Springs: Racing springs allowed.
Front:No spring spacers, springs same height.
Rear ; No spring spacers, springs same height side to side.
REAR SUSPENSION: No aluminum parts. No Schrader-valves or adjustable shocks. No gas reservoir shocks. Shocks must be all steel. Cannot move spring forward, back or side to side. Must be in stock location. Leaf springs can run lowering blocks but no adjustable lowering blocks. No spring sliders. No split leaf springs must have same number of leafs in front of axle and behind. No slapper type traction devices. No roller bearings. No heim ends. Must be stock type bushings
i.e. If it came with a rubber bushing with steel insert it must remain that way. Aftermarket stock replacement ok. No floating bird cages, coil eliminators or any other traction devices allowed!!! No weight jack bolts. Rear shocks must be in stock type location. (if they came in front of the rearend they must remain there)
Rear trailing arms no more than 2 7/8 inches from bottom of housing to center of bolt. Same both sides. Upper control arms no more than 2 ½
inches from housing to center of the bolt. Same both sides. No adjustment holes allowed on rearend or chassis, must be stock location on chassis. Torque arm cars
must use stock type arm, aftermarket replacement ok but must match oem measurements non-adjustable, must use stock type bushing, front mount may be
fabricated but cannot be adjustable.
Weight:
No added weight. 46 max.rear percentage, no tolerance.
IGNITION:
Must be stock!!! No DUI or MSD, ect.
FUEL TANK:
Must be fuel cell, mounted in trunk. 22 gallon max, at least 2 straps both directions.Must have steel outer can. New Style Fuel Cell or Flapper Valve Update Lid (Speedway Part Number 458-315)
TIRES:
Stock street tires, dot, no all terrain tires, max. 8 inch tread, will be checked with track gauge, P235/70r15 max., 255/60r15 max., 8 inch asphalt take offs allowed. 50 minimum compound.
WHEELS:
8 inch max, steel wheels, no bead locks, must have 1” lug nuts.

DRIVESHAFT:
Stock length, painted white, no aluminum.
BRAKES:
Must have 4 wheel working brakes. No shut off valves, bias valves, or aftermarket pedals permitted. Must use OEM type master cylinder. May remove power booster. Pedal must be in stock location.  4 wheel disc brakes ok. Pedals in Stock Location NO Extensions
FIRE EXTINGUISER:
Required, must be in drivers reach.
UNIFORM:
Must wear full racing suit and gloves
HELMET:
Snell rating of at least 2000
BELTS:
3 inch belts 2 years old max!!!!!!
SEAT:
Aluminum racing seat, mounted to cage, securely mounted, stock location. No setbacks!!!!!
MISCL:
This is a stock class, no high performance parts; if you think it is a grey area ask track or tech before doing it, will be tech'd by tracks interpretation of rules!!!!!

Midwest Modz
2018 updates;
New Style Chip Box Required (CT8727)     No Weight Added To Rear Axle, No Heavy weight axle tubes (max .250 wall)  

COMMUNICATIONS: All competitors must have a RACECEIVER 1600 in car radio to compete at the Raceway.
FRAMES - Factory production complete full American passenger frames only. Frame rails must extend to a point beyond the base of driver’s seat. Rear clip may be fabricated out of tubing. Front and rear pick-up loop required; otherwise bumpers or other pick-up point will be used.
BODIES – SEE IMCA NORTHERN SPORT MODS for rear sail panel rules. Exceptions: no spoilers, no spoiler sides, no nose wings. RULE CLARIFICATION: Bodies:MD3 nose not allowed, no nose wings, window opening must be a min. of at least 12 inches on all 4 corners. Body may extend 1″ past the tire on both sides. Max. deck height 39 inches,,
No Tolerance. Rear Sail Panels: MUST MEET IMCA NORTHERN SPORT MOD RULES.
No reverse hood rake
WHEEL BASE- 108 inches. Minimum, 112 inches maximum both sides.
ROLL CAGE - Must consist of continuous hoops not less than one and one-half inches outside diameter and must have a wall thickness of at least .095 inch. Must be frame mounted in at least six (6) places. Body mounted roll cages not acceptable. Must consist of configuration of front and rear hoops connected by tubing on sides or side hoops in a manner deemed acceptable by the inspector . Driver’s head must not protrude above cage with helmet on while strapped in driver’s seat. Roll cage must have a 3/16-inch inspection hole in non-critical area. Must have at least three (3) horizontal bars at driver’s door welded to front and rear of roll cage members.
WEIGHT - Minimum weight is 2500 pounds with driver after race , No tolerance. All lead weight must be mounted securely, with 2 weight clamps & 1/2 inch bolts. Lead must be painted white & have your car number on the lead. CARS RUNNING AFTERMARKET TRANSMISSIONS MUST WEIGH A MINIMUM WEIGHT OF 2550 AFTER RACE WITH DRIVER & MUST HAVE 50 POUNDS OF WEIGHT MOUNTED IN FRONT OF MIDPLATE.
WHEELS - Wheel width must not exceed eight (8) inches. No aluminum wheels. Bead locks allowed on right rear only. Any foam or plastic type mud cover mounted on right side wheels. Inner mud plug on L.R. only.
TIRES - American Racer G-60 only. Tires may be grooved & siped.
DIFFERENTIAL/REAR END - Any passenger car type or truck rear end may be used. No aluminum Full spools permitted. No quick-change devices allowed. Floater rear ends are allowed.
BRAKES - Disc or drum brakes may be used front and rear. No aluminum disc or brake calipers allowed. Brakes must be operational on all four (4) wheels and must lock up all four wheels during inspection.
FUEL SYSTEMS - Gasoline only. No oxygen bearing additives. No pressurized fuel systems. Fuel cells mandatory. Fuel max. capacity of 22 gallons. Must have new style screw on lip with flapper in top. Fuel cells must be encased in an approved metal container of no less than 20-gauge steel or 1/8 inch aluminum. Fuel cells must be mounted between frame rails as far forward as possible and using four, two (2) inch by 1/8 inch metal straps, two in each direction. Bumper must be equipped with a drag loop extending below bottom of the cell. No electric fuel pumps
BUMPERS - Bumpers must be used front and rear. Front bumper must be mounted on frame end and be of a semicircle configuration with the bottom loop parallel to the ground. Front bumper must be ten (10) inches high from bottom bar to top of top bar. Material must be one and one-quarter inch minimum, two-inch maximum O.D. steel pipe. Rear bumpers may be constructed of pipe, square tubing, but must not have sharp edges. Rear bumpers and nerf bars must not extend beyond width of rear tire. Bumpers must be able to support car when lifted by wrecker.
SEAT AND SEAT BELTS - Racing seat mandatory. All cars must be equipped with an approved quick release type seat belt and shoulder harness securely fastened to frame and roll cage. Seat belt material should be at least three (3) inches wide AND CANNOT BE OLDER THAN 2 YEARS. Seat and steering wheel may be located to suit driver’s taste, but must be kept on left side of car. No center steer.
ENGINE LOCATION - Rear of engine (bellhousing flange) must be at least 72 inches forward from the centerline of the rear axle. The center of the crankshaft must be within two and one-half (2 1/2) inches of centerline of the ball joints.
Engine -
stock motor Must be same make as car. MAXIMUM Size of engine block: 350 gm .060 max. 351 windsor ford .060 max. 360 chry. .060 max Harmonic balancer on G.M.min.8 in Smaller engine allowed no stroker engines allowed !!!!!!!!! OEM firing orders cannot be changed
No B Hive or high performance valve springs allowed
9 to 1 compression max.
Heads: 76 c.c. min.,stock , no performance heads (no double humps ,no292,041 castings ,, no lt1., no bowtie , no center bolt valve cover , or aftermarket allowed.) No porting or polishing, no screw in studs with shoulder, no guide plates, 194/160 valves max. no 202/160 allowed. 305 heads on 305 only!!!!!!Camshaft- Hydraulic camshafts only &must pull at least 15 inches of vacuum at 1000 rpm. no tolerance. Hyd. Cam 430 maximum lift at valve, stock 1.5 ratio rockers only no tolerance. No polylocks , No roller cams, no roller tip or roller rockers allowed.
Lifters stock type , no Rhoades ,anti pump up ,high revolution, etc .Stock Type Wire Clip.

Crankshaft and rods- Stock appearing, no light weight no h- beam rods. Press fit rods only, No floating rods,5.7 rod on G.M.max
Pistons-
flat top 4 valve relief only Hypereutectic 4 valve relief pistons ok. no je, ross or etc. No high performance parts allowed.
BALANCER- No Modifying of Harmonic Balancer.8.9 lbs. min.
TRACK HAS OPTION TO ENFORCE THESE RESTRICTIONS WITH A CUBIC INCH PUMP GAUGE OR BY VISIBLY CHECKING PARTS AND PART NUMBERS. DISQUALIFICATION AND LOSS OF POINTS IF FOUND ILLEGAL.
SHOCKS: One steel, nonadjustable, unaltered shock per wheel only .NO Take Apart Shocks. No external gas ports of any kind (No screws, No Schrader valves, No ports,none) All shock mounts, including screw jack type, must be welded. No external or internal bumpers or stops. No coil over, air, or remote reservoir shocks. No Schrader valves or bladder type valve allowed. Front half of any shock may be shielded. One or all shocks may be claimed per event for $75 each.
*FRONT SUSPENSION-FRONT SUSPENSION MUST MATCH FRAME AND BE IN STOCK LOCATION. PARTS MUST BE REPLACEABLE FROM STOCK OEM TYPE PARTS FROM SAME TYPE SUSPENSION EXCEPT UPPER A-FRAME AND A-FRAME MOUNT. TUBE TYPE UPPER A-FRAME MAY BE USED. FABRICATED A-FRAME MOUNT MAY BE USED BUT MUST BE IN STOCK LOCATION. LOWER AFTERMARKET A-FRAME CAN BE USED BUT MUST BE IN STOCK LOCATION. NO FABRICATED SPINDLES. ADJUSTABLE STRUT BARS CAN BE USED ON FRONT END ONLY. NO COIL OVER SHOCKS ALLOWED EITHER FRONT OR REAR. ONE SHOCK PER WHEEL.YOU MAY NOT RUN A DAMPENING SHOCK ABOVE THE REAREND. STEERING BOX MUST BE STOCK OEM TYPE AND BE IN STOCK LOCATION. NO RACK AND PINION STEERING. NO CENTER STEERING. ADJUSTABLE SWAY BARS ALLOWED.
*REAR SUSPENSION-TWO OPTIONS: AFTERMARKET THREE LINK DESIGN OR MULTI-LEAF SPRING DESIGN. ALL COMPONENTS MUST BE STEEL. ALL MOUNTS AND BRACKETS MUST BE WELDED OR BOLTED SOLID.YOU MAY NOT RUN A DAMPENING SHOCK ABOVE THE REAREND.
A). THREE LINK DESIGN REQUIREMENTS: MUST USE MINIMUM 16 INCH CENTER TO CENTER OF HEIMS LOWER TRAILING ARMS BOTH SIDES NEEDS TO BE THE SAME, (1/2 INCH TOLERANCE ) , NO SWING ARMS. SOLID PULLBARS ARE REQUIRED, NO SPRING BARS, RUBBER BUSHINGS OR ANY TYPE OF TORQUE DEVISE.PULLBAR MUST BE MOUNTED SOLID ( NO RUBBER OR ANY TYPE OF CUSHION IN THE MOUNTING BRACKET) MUST BE LOCATED AT TOP CENTER OF REAR END HOUSING AND REMAIN CENTERED ON HOUSING OVER DRIVE SHAFT(1INCH TOLERENCE LEFT TO RIGHT). MAY USE MINIMUM 23 INCH LONG PANHARD BAR LOCATED BEHIND REAR END HOUSING OR MINIMUM 19 INCH LONG J-BAR MOUNTED TO A STEEL PINION BRACKET. MEASUREMENTS ARE FROM CENTER OF HEIM JOINT TO CENTER OF HEIM JOINT. MAY MOUNT REAR SPRING DIRECTLY OVER AXLE HOUSING OR USE COIL COVER ELIMINATORS (SLIDERS). LOWER SPRING PERCH OR COIL COVER MOUNT MUST BE WELDED TO REAR END HOUSING. NO BIRDCAGES OR FLOATING MOUNTS ALLOWED. MUST USE STEEL UPPER WEIGHT JACK IF SPRING ARE MOUNTED OVER AXLE HOUSING. NO SHOCK TYPE ELIMINATORS.
REAR END - Any steel approved OEM passenger car or truck non-cambered rear end allowed, must be centered in chassis. All components must be steel, except lowering blocks, axle cap, and drive flange. Safety hubs (floater) allowed. No quick-change devices. Inspection hole in housing required. Mini-spools only. Ring gear, center section and yoke cannot be lightened. Solid steel axles and one piece drive flanges only.
CARBURETOR: 4412 HOLLEY
NO MODIFACTIONS . EXCEPT JETS AND REMOVED / NOT CHOKE TOWER. CARB. IS SUBJECT TO CLAIM BY ANY DRIVER IN A FEATURE IN LEAD LAP. CLAIM IS 250 DOLLARS OUTRIGHT OR 175 DOLLARS EXCHANGE . FAILURE TO SELL /POINTS AND FINISH FOR THE NIGHT, 2WEEKS SUSP. ,AND 50 DOLLAR FINE / NO ELECTRIC FUEL PUMPS / MANUEL ONLY. SPACER PLATE FOR CARB. FROM INTAKE TO CARB. ONLY/ CLAIM $25 OUTRIGHT /$15 EXCHANGE.Carb must have vacuum ports for testing vacuum. Carb. Spacers 1 Inch Max, NO Tapered Spacers.

OIL PANS - Extra capacity oil pans are permitted. No dry sumps allowed. Oil pump must mount in stock position. MUST HAVE 1 INCH INSPECTOIN HOLE ABOVE OIL LEVELFOR INSPECTION .Inspection Hole needs to be installed in a manner were tech official can see crankshaft & rods for proper inspection .If not pan will be removed for inspection
STARTER - Engine must have working starter and must be capable of starting car on demand.
TRANSMISSION:
OEM three-, four- and five-speed and automatic production-types are permitted. With engine running and racecar in stationary position, driver must be able to engage racecar in gear and then move forward and then backward at time of inspection.
* In and out” boxes are not allowed. Ball spline transmissions are not allowed. * May all be clutch-operated or an OEM automatic with a coupler. May use a hand or clutch pedal operated ball valve for neutral.
* AFTERMARKET TRANSMISSIONS are permitted with(50)pounds of weight mounted in front of the mid-plate. Overall racecar weight must be two thousand five hundred fifty pounds with Driver after the Race.....2550
* Approved aftermarket transmissions are Bert (Part #BERLMZ) Bert 2nd Generation are NOT allowed , Brinn (Part #70001), Falcon (Part #60100) and RaceGator (Part #140002/140002-C) and Mitchell Machine Bullet Tranny with internal clutch. * Clutch must be inside of bell housing for OEM production-type transmissions . * Starter must bolt to engine block or factory location. * One (1) forward gear and one (1) reverse gear must be in working order, plus a neutral position, and must be able to be shifted by driver. * Aluminum flywheel are NOT permitted. Must have full-sized steel bell housing. Flywheel must bolt to crankshaft. Clutch must bolt to flywheel, a minimum six and one-quarter (6.25) inch clutch. * Automatic and aftermarket transmissions must have a guard two-hundred seventy (270) degrees around flex plate or flywheel, and must be constructed of at least one-quarter (0.25) inch steel. Alternatively, automatic transmissions may utilize an SFI-certified aftermarket guard. Flex plates must be SFI certified. * Internal clutches are not allowed except for approved aftermarket transmissions.
DRIVE SHAFT: Minimum two-inch diameter, white, steel drive shaft. Steel slip-yokes only. 360-degree drive shaft loop required and must be constructed of at least .25-inch by two-inch steel, or one-inch tubing, mounted six inches back from front U-joint.
BATTERY - All batteries must be mounted in a safe manner .Top of battery must be covered
HELMETS & FIRE SUITS - Helmets are required and must be worn at all times car is on the track. All drivers must wear fire suits of a flame-******ant nature. Two-piece suits are allowed. Fire resistant gloves are mandatory. Fire resistant boots are highly recommended..
EXHAUST - Any collector type header allowed. Exhaust must be directed away from areas of possible fuel spillage. No zoomies .No 180 degree headers No step down or y type headers.
KILL SWITCH, FIRE EXTINGUISHER, WINDOW NET - A kill switch is required within easy reach of the driver. This switch must be clearly marked OFF and ON. Weights and/or loose objects are not allowed in the driver’s compartment. All cars must be equipped with quick release type window net on driver’s door. No rear view mirrors of any kind. No radio communication or sound equipment of any kind.
GAUGES/ELECTRONICS – Mandatory  MSD part #8727CT rev control box is permitted with unaltered wiring harness ( max rpm setting must be 6,200 ) .12-volt ignition system only. HEI distributor only. OEM firing order cannot be changed. Ignition rotor, cap, coil and module must remain OEM appearing. No ignition boxes, remote coil or accessories. All wiring must be visible for inspection. Only gauges allowed are analog oil pressure and water temperature and analog tachometer (memory recall allowed). No electronic traction control ALLOWED
Aftermarket eagle scat, ect. Stock type ok No lightening of any kind to crankshaft 3.48 stroke max. Intake manifold-, only intakes allowed ,gm 2101, ford 2121 or 2181 , chrysler2176 or 3776 / intake must be unaltered .
These rules are wrote & interpreted by the Race Track & the Tech Officials not the Drivers.If doesn't say you can't it doesn't mean you can.