* Stock unless
* Must add 50 pounds if perches are moved.
1. Body: Please see drawings at end of rule book:
Any full size American car or truck, 102" wheelbase
minimum. Doors & fenders may be aluminum. Must have
steel floor pan under driver. Must run complete,
enclosed cockpit. Front firewall location may be
moved for engine clearance. Firewall may be replaced
aluminum or steel material only. Rear of car may be
open. Can cut for tire clearance and can remove
inside wheel wells. Push bars must be behind grill.
Any nose OK. NO flared fenders. No MD3 or MD3 style
noses. AR Dirt Bodies approved. Solid mounts OK.
Cars must remain stock appearing. May have max. 8"
rear spoiler ( 8" tall x 24" long side spoilers or
spill plates). May run 3 spill plates. See diagram
for measurements. Maximum spoiler height 50". May
run one 4" spoiler inside car. Hood and trunk straps
permitted. (May run hole in hood for breather). 48"
x 48" min. roof. Max. body width 72".
2. Chassis: Must have roll cage, and all safety
equipment. Cage must secure to uni-body. All cars
frame may be tied together under floor pan. Wheel
base stock (2" tolerance). 7.5" min chassis height
on Johnson Chassis. T&L type chassis must run 602
* Johnson Racing X.Y.G. Metric Chassis Allowed.
(This is the ONLY aftermarket chassis that is
allowed.) Please visit
* All tubular frames will be serial numbered. Any
tubular frame without the SECA or Crate Racing
serial numbers will be considered illegal. Any
Johnson frame or repaired clip found to be altered
could result in fines or suspensions.
* Stock metric frames have to option to be repaired
with SECA or Crate Racing USA tubular front and/or
rear clip. Front and Rear clips will also have SECA
or Crate Racing USA serial numbers.
* Stock metric frames have the option to run the
Left Upper A Frame: JCI-09-02-003R
Right Upper A Frame: JCI-09-02-003L
Left Lower A Frame: JCI-09-02-01RC-L-SP
Right Lower A Frame: JCI-09-02-01RC-R-SP
Rear Upper Trailing Arm: JCI-09-03-04B
Rear Lower Trailing Arm: JCI-09-03-03B
* No notching of frame for tie rod clearance.
Johnson Chassis that have been notched must have
cover the notched area on sides and bottom of frame
with .125 steel.
3. Suspension: Must be stock. Screw jacks OK on rear
only. Lowering blocks OK. Adjustable cups OK. May
cut top A-frames to adjust camber and caster (Top
a-arm only may be tube non adjustable). Stock
perches, must be in stock location. May enlarge hole
for shock clearance. Spindle savers ok. Steel, nylon
bushing, or monoballs OK.
Shocks- Steel body non-adjustable racing shocks OK.
NO Schrader valves. Hypervalve or external fill port
must be covered with JB weld. NO bump stop on
shocks. May relocate rear only. Front shocks must
remain in stock location. Front shock mounts may be
moved up (Vertically) to prevent bottoming out with
3" max. from stock position. Heim joints OK on
shocks only. May cut rear top control arm to adjust
for pinion angle ONLY. NO coil over type
adjustments. Heim joints allowed only where stated.
Shock Claim- Front- $150 each. Rear- $200 each
4. Rearend: May run 9" Ford. Floater legal. Disc
5. Brakes: Stock caliper for make and type of car
disc OK (No 4 piston calipers) any pedals; adjusters
6. Wheels: Any steel 8" maximum. Large wheel studs
OK. Bead locks OK, outward facing only.
7. Tires: Hoosier Tires Only!! EMOD, M500, H500.
Tires susceptible to Chemical Tire Protest.
8. Driveshaft: Any steel 1 1/2" or larger. Must be
painted white, with car number. Must have safety
9. Transmission: Must be stock with at least one
forward & rear working gear. Bert/Brinn type tranny
OK with reverse mount starter.
10. Flywheel: Stock flywheel (No less than 10 1/2",
must weigh 14 lbs). Clutch and pressure plate or
triple disc clutch with flex plate is OK (No smaller
than 5.5"). NO single disc.
11. Engine Location: #1 sparkplug in line or in
front of top ball joint. 0 Tolerance.
12. Fuel: Must pass track test. Fuel tank must be
mounted inside of trunk.
13. Weight: Weight MUST be posted on hood due to
different head rules. Dart Heads 3200 lbs. after
race. Crate engine cars running 604 2950 lbs after
race, 50 lbs of total weight added in front of
firewall for aluminum heads. (Tech man will check
for weight on firewall at scales) Crate engine cars
running 602 2700 lbs after race. Super Street cars
running Carolina Speedway rules- 3000 lbs-492 small
valve heads with stock tranny- 3100 lbs- 492 small
valve heads with Bert/Brinn style tranny. Cars
claiming Durrence Layne rules must weigh their
weight by DL rules. Weights will be adjusted for
competition as the season starts.
14. Engine Specs: Must match make of car, Chevrolet
for Chevrolet, Ford for Ford, etc. 365 Max Cid. Or
GM Crate Motor Part #88958604 (350 factory stock
circle track engine - 88958604).
Block: Cast iron OEM only (No Bowtie or SVO). May
plug, or install vent pipes, or screens. May Plug
deck and re-drill water holes. Maximum cylinder bore
Crank: Any steel stock appearing crank. No billet.
50 lb min weight. May balance (Drill hole, weld,
minor grinding). For balancing purposes the
counterweights may be turned. Must maintain 1.950
for steel /1.750 for cast. No knife edging. No
pendulum undercut. No polishing or lightening of
counterweights or throws. Will be weighed with cam
gear and pilot bushing.
Rods: Any steel rods. No aluminum or titanium rods.
Piston: Any flat top Eyebrows legal.
Oil Pan: Any wet sump oil pan.
Heads: Stock cast iron OEM, No Bowtie or angle plug
heads, may run double hump. Competition valve job
permitted; Any angle any depth. All angles must be
concentric with valve guide; May have .750 hand
blend from top of 45 degree (7/8 will be wrong).
Screw in studs and guide plates OK. Roller Rockers
are permitted. Also may run Dart #10024266 57cc. or
Dart Iron Eagle Sportsman Head #10110010F. 180*
Intake Ports, 49cc, 47 min. Only other modification
competition valve job (202 Intake / 160 Exhaust).
May also run World Product Head #011250-037. Any
head other than OEM GM MUST add 100 lbs.
Valve: Any stock diameter, steel valve permitted.
Valve may have under cut stem 2.02" (Intake) and
1.6" (Exhaust) valve sizes are allowed.
Valve Spring: Any steel. Single or double.
Retainers: Any steel or titanium valve spring
Cam: Hydraulic or Mechanical .500" lift max.
Hydraulic checked with zero lash and mechanical
check with .025" lash. Any Hydraulic or solid flat
tappet lifter. Stock diameter only. All cams MUST be
OEM firing order.
Lifter: Stock diameter. No roller lifter.
Intake: OEM Bowtie cast iron intake, or any
aluminum, as casted. No modifications.
Fuel Pump: Stock only.
Carburetor: 650 Holley (#4777) OK (No 4 corner idle
screws). May run a 2" Spacer with no more than (2)
.070" thick gaskets. May drill holes in butterflies.
Must pass track gauges.
Ignition: Stock, may have chip. Billet distributor
OK. Any wires. MSD box allowed or same as.
Header: Headers OK. Exhaust EVAC system OK.
Claimer rule on crate motor only 604 $5,200 and 602
$3,550. Track will keep $50. Engine will be received
with accessories as supplied from GM. Only highest
finishing crate engine may be claimed. Only driver
on the same lap can claim. If more than one person
claims, the driver finishing the farthest back gets
(Two Things Only) $300 with track retaining $100.
Bottom End protest - $600 with track retaining $100.
602/604 Motors will be treated as regular protests
and bolts are not required.
(Under Hood Visual Protest) $50 straight fee to look
for carb # (After Heats Only).
Shock Claim- Front- $150 each. Rear- $200 each
(Tire Chemical Protest) $125 per tire to protest.
$125 per tire acceptance fee. 3 grooved strips
removed from tire and sent for lab testing.