Tulsa Speedway 2020 Pure/ Factor Stock Rules
1. Any American made stock passenger car body or truck on
a stock unaltered full frame, or unibodies. No front wheel
drives. Stock appearing aftermarket plastic nose or tail
pieces are allowed. Rear of car must be sealed off, no
exposed fuel cell. No spoilers (even if factory equipped),
Bodies cannot be moved from the original body mount rubber
bushing no more than +/- 1” cannot be less than 5 ˝” from
ground. A front visor is allowed on the windshield area
MAX 7 inches. No side or rear window visors allowed.
Sunroofs and T-tops must be reinforced and enclosed. No
nerf bars. Maximum one inch wide by two inch tall steel or
lexan rub rails allowed - bolted flush to body. All glass,
plastic, upholstery, lights, mirrors, and trim must be
removed. Cars must be stock appearing. No cutting,
channeling, shortening, or modifying of body is allowed.
No excessive trimming of fenders or hoods allowed, must
maintain stock OEM appearance. All doors, fenders, and
window openings must remain stock appearing and OEM
dimensions and should be the same on both sides. Inner
fender wells on the rear must remain. No straight slab
sides. No enclosed interiors or decking allowed. Front
edge of rear deck cannot be more than 8” forward of center
of rearend and must have at least 2” continuous drop from
front to rear. Rear of dash can be no more than 35” from
the center of the distributor or 28” from back edge of the
center of stock hood. Front and rear firewalls must remain
in stock location and be full and complete. Cars must have
a complete stock steel roof mounted in OEM location and
OEM rake and angle for model. All openings should be
covered as to isolate the driver, subject to track
approval. Racecar body should be maintained in such a
manner as to keep a presentable appearance.
2. Steel or aluminum fabricated bodies are allowed.
Aluminum bodies must be a minimum of .040" thickness. Any
STEEL OR ALUMINUM fabricated (any body that is not
"stamped") body must add 50 lbs in front of engine. Steel
OEM "stamped" bodies are recommended. All bodies should
maintain stock body lines. The intent of this class is to
be a cost effective stock car class with stock bodies
1. Stock type rear bumper required, a fabricated front
bumper may be used with the following conditions: cars
with aftermarket nose pieces- the bumper may extend past
frame rails for support and reinforcement. Must be behind
nosepieces. Cars without nosepieces- the bumper may not
extend past front frame horns. NO SHARP EDGES. Must have
tow hooks on both front and rear. Race track is not
responsible for tow damage. Rear bumpers must be covered.
1. Minimum four-point cage, minimum size 1 ˝ “O. D. by
.095” wall thickness. Minimum three bars in driver’s side
door, and two bars on passenger side door (three bars if
passenger in car). Four-point quick release seat belt and
harness required for driver and passenger. Racing seats
required. Must have window net on driver side and
passenger side if occupied. Must have at least three bars
in front of driver in windshield area.
1. Must be stock for the make and model except no 400’s or
larger small or big blocks. Chevy must use 4 equal valve
relief pistons. OEM crankshaft only and NO lightening. No
aerowing, bullnose, knife edge, undercut or drilling of
second or third rod throws. OEM steel Connecting rods only
must remain stock OEM length, weight and shape. No
lightening of any parts. Aftermarket water pump, mini
starter, pulleys, harmonic balancer and oil pans okay.
Aftermarket power-steering pumps okay. Metric cars may run
a 350. NO stroking or destroking. Engine must be in stock
ocation. Solid motor and transmission mounts okay. Maximum
cranking compression 175lbs. (ignition off, engine turned
over 5 times). Oil pans must have at least 1”inspection
hole. All Fuel Pumps must fit in front of the crossmember.
2. Hydraulic cam and flat tappet lifters only. .450
maximum lift. Must maintain 14” of vacuum at 1200 rpm.
1.94 maximum intake valve diameter, 1.50 maximum exhaust
valve diameter on Chevrolet engines. No hollow valve
stems. Stock size and shape valve springs and retainers.
Stock length and diameter pushrods only.
3. Stamped steel 1.5 rockers on Chevy, 1.6 on Ford and
Chrysler, NO roller tips.
4. Open chambered heads only, must be unaltered, O.E.M. NO
porting, polishing, or gasket matching allowed. The only
GM head numbers allowed are 14079267, 3986336, 3986339,
3986339X, 3986388, 3932441, 376445, 3928454, 3932454,
3876487, 3973487, 3973487X, 3973493, 3951598, 468642,
330862, 333882, 3998920, 3998991, 3998993, 3998997, and
3970126. Screw in studs and guide plates ok. 305 engines
may use 305 heads (no vortec). May use stock
replacement(SR) cylinder heads: Engine Quest (EQ) GM Part
Number CH350I, (EQ) Chrysler Part Number CH318B, World
Products Ford Part Number 53030 – 1.250” (+/- .015”
tolerance) maximum O.D. valve springs. All SR cylinder
heads must remain as produced, seat angles and valve sizes
cannot be changed: Three angle valve job only(absolutely
no casting removal in valve pocket of EQ or World Products
head for any reason).
5. Cast Holley 4412 -2 barrel only. Must be unaltered.
Choke plate may be removed. 4412 must be cast into choke
horn of carb. Maximum spacer and adapter 1” combined
total. Fuel pump must be in stock location for make, NO
electric pumps or fuel injection even if factory equipped.
Holly 1850 vacum secondary. Quaderjet 750 no metering
block on secondary’s.
6. Stock OEM unaltered aluminum or cast iron intake only.
No aftermarket or stock high performance or high rise. No
bowties. No porting, polishing, cutting or gasket
7. You can run a listed after market aluminum intake
and/or larger hydraulic cam then listed above, MSD #8727CT
(digital) rev limiter set at 6,200 RPM. Rev-control units
must be unaltered and mounted under the hood on engine
firewall and accessible for inspection with rev limiter
facing upward. Approved aluminum intakes are: Unaltered,
Weiand GM#7547, #7547-1; Ford#7515, #8023 or #7516;
Chrysler#7545, #8022; Edelbrock GM#2701; Ford#7121,# 7181,
#7183; Chysler #2915. No marine type intakes allowed. No
aluminum high rise or vortex intakes. Not porting,
polishing or alterations of any kind to head and/or
intake. If it is a 4 barrel intake it must be a spread
bore intake. No Brusinski’s intakes or exhaust. This rule
is in place to allow other area cars to race with us, but
to not give them an advantage over the more traditional
pure stock motor rules. We will continually monitor race
results and adjust the Max rpm as needed. If we change the
rpm chip required then we will provide the chip. We have
also purchased a tool to check the rpm chips.
8. CRATE ENGINE: http://www.speedwaymotors.com/Chevrolet-Performance19258602-Sealed-350-602-
Small-Block-Crate-Engine,67819.html Crate engine MUST use
MSD #8727ct rev-control and 6,200 rpm chip. Rev-control
must be mounted under the hood on engine firewall and
accessible for inspection with rev limiter facing upward.
Crate engine must remained sealed. If seal is broken or
internal engine is tampered with in any way it will result
in immediate disqualification. Open motor 6500 RPM this
rule is subject to change.
1. Cast iron exhaust manifolds or headers. Round tube
headers only. All primary header tubes must enter directly
into one collector, at same point, at end of header. Must
go underchassis and have turn downs. Mufflers are NOT
mandatory for 2020 but encouraged.
1. Any stock type automatic or manual. Automatics must
have stock appearing working 10” torque converter cannot
be smaller with ring around it. No direct drives.
Transmission Cooler ok. Manual must have single disc 10.5”
clutch, flywheel and pressure plate must be steel minimum
16lb steel flywheel. No mini clutches. Steel drive shafts
only must be painted white and have a loop 6” minimum from
1. Pump or racing gas only. No additives or smells. Fuel
cell must be secured in trunk any part of fuel cell cannot
be forward of any part of rear end.
1. Front and rear suspension must be stock unaltered OEM
for that make and model of frame, ball joints, spindles
and all components. No air shocks. No alterations to any
part of the suspension or frame will be allowed. Any
spring in stock location no spring rubbers, no adjustable
weight jacks of any kind, must sit in unaltered stock
mounts. Maximum length of rear springs is 14" tall "free
height" and both sides must be equal. May run IMCA type
upper control arms. Sway bars must be stock for make and
model mounted in OEM mounts. No suspension stops of any
kind. Shocks must have stock type rubber ends, no screw on
ends of ANY KIND, must be mounted in stock location on
frame, control arm and rear-end. No bulb-type, threaded
body, coil-over, or remote reservoir shocks. No external
or internal bumpers or stops no Schrader valves on shocks.
No adustments on shocks of any kind. No spacers on shock
mounting. Steel shocks only.
1. Stock rear-end for make and model no modifying axle
bearings or length. All brackets and control arm, shock
mounts must be in stock location. Gears may be locked must
use stock unaltered ring gear carrier may weld or use bolt
in locking blocks. No full spools, Detroit lockers or
torque sensing devises. Full floater axle is ok, no gun
drilled axel. Center of upper control are bolt must be
2.25 to 2.75 inches from top housing. Center of rear lower
control arm bolt hole must be 2.25 to 4.5 inches from
bottom of housing.
STEERING / DRIVER SEAT
1. Steering boxes must remain in stock location.
Aftermarket steering wheel and quick release steering
coupling are recommended. Quick steer boxes allowed. NO
part of driver seat may be no further back than 25”
forward of center line of rear end housing. No knobs,
handles, switches, or levers other than the gas pedal and
brake pedal allowed behind the firewall that can adjust
carburetor, ignition timing, or
brakes...(Exception--->kill switch and starter button)
1. Any (1) radiator that fits in original location without
any body modifications is allowed. Water pump mounted fans
only, No electric fans. Aluminum radiators allowed.
1. One 12 volt battery only must be mounted securely in
rear of driver’s compartment or trunk area. One stock type
distributor, module and coil in stock location only.
Ignitions on/off switch must be clearly marked. No
traction control devices of any kind. No billet
distributor, no crank triggers. If battery is mounted in
drivers compartment must be covered in marina box.
1. May use any (1) one master cylinder. Aftermarket pedal
OK. Must have at least 3 working brakes. Right front may
be blocked. No bias adjustment is allowed. Disc brakes
allowed in rear No aluminum or composite rotors or
calipers. Must use steel stock type rotors on rear disc.
No lightening of components. Master Cylinder must be on
TIRES AND WHEELS
1. 10” maximum wide wheels allowed, 15” diameter steel
wheels only, wheel covers and mud plugs right side only.
Bead locks or screws allowed on the right side only. NO
bleed-off valves. Must run 1” steel lug nuts. Approved
asphalt pull-offs only, must durometer 60 or higher. No
soaking or softening allowed. Grooving is allowed for
1. Weight may be securely added in trunk or under the
hood, but not in plain view or within the driver’s
compartment must be painted white with car number. Car
must weigh minimum 3000 lbs. with driver after race. Must
be mounted with minimum of ˝ ‘ bolts.
1. Any car with "minor" rule infractions will be allowed
to race (1) event. Must be determined before the race.
Cars with infractions are subject to weight penalty The
rules and/or regulations set forth herein are designed to
provide for the orderly conduct of racing events and to
establish minimum acceptable requirements for such events.
These rules shall govern the condition of all events, and
by participating in these events, all participants are
deemed to have complied with these rules. NO EXPRESSED OR
IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM UBLICATIONS
OF OR COMPLIANCE WITH THESE RULES AND/OR REGULATIONS. They
are intended as a guide for the conduct of the sport and
are in no way a guarantee against injury or death to a
participant, spectator or official. The competition
director shall be empowered to permit reasonable and
appropriate deviation from any of the specifications
herein or impose any further restrictions that in his
opinion do not alter the minimum acceptable requirements.
NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT
FROM SUCH ALTERATION OF SPECIFICATIONS. Any interpretation
or deviation of these rules is left to the discretion of
the officials. Their decision is final.
Car Protest $150 protest fee. Cash only. Only driver can
make the protest, not crew. $50 of the protest fee goes to
The New Tulsa Speedway. Item being protested must be in
writing with cash five minutes following the completion of
the A Feature event. Driver making the protest must have
raced at The New Tulsa Speedway the previous four weeks.
Driver making protest must finish on lead lap night of the
protest. Only top three finishers are eligible to be
protested. Any driver that wins three races within one
racing season will go through an extensive technical
inspection, which could include but is not limited to
bumper to bumper inspection. (In layman's terms, if you
are cheating we will find it). Track reserves the right to
change or amend any rule at any time. No creative
interpretation of rules. If you have questions, call us
before you are disqualified. If it does NOT say it, that
doesn't mean you can do it. OEM does not mean HIGH
PERFORMANCE. If you cannot find the OEM part at your local
parts store, then chances are you cannot run it. Any car
that does not pass tech will be tech before that car races