IMCA Racesaver 305 Sprints are allowed to race with the
Champ Sprints at Tulsa Speedway. Absolutely no mixing of
GENERAL SAFETY REQUIREMENTS:
All cars subject to inspection at any time and must be
free of mechanical defects and be in safe racing
Full face racing helmets meeting Snell 2000 standards
required and must be worn at all times the car is moving.
Helmet must be with car during inspection.
A single racing fabricated seat is mandatory and must be
factory manufactured. Only approved seat installation and
seat structure that passes inspection will be approved for
this series. Seat backrest cannot be moved further back
than the roll cage rear main hoop.
Fire retardant uniform, fire resistant gloves, fire
resistant shoes, socks and head hood or helmet skirt, and
arm restraints are MANDATORY. Head and neck restraints
A 3” wide safety belt and shoulder harness with 2 (two)
belts over shoulders, and a quick release type are
required. Must have minimum of one submarine strap. All
belts must be securely fastened to frame or roll cage.
Belts must be replaced every 4 (four) years beginning with
belts dated 2007. Date tag or stamp is required.
Shock-resistant roll cage padding on all bars that drivers
head, legs and arms may contact with while strapped in
seat is recommended.
Two throttle return springs recommended as well as a toe
strap on the throttle pedal.
Front rock screen from top of hood to top front halo and
from roll bar to roll bar is required. Must be fastened
with hose clamps or bolts. No plastic ties allowed.
There must be a minimum clearance between drivers head
with helmet on and top of roll cage of 2". Loops may be
used and must be constructed of same tubing requirements
as roll cage. These must be added in a safe manner.
No rear view mirror allowed of any kind, inside or outside
There must be a right side head net or seat brace for head
All participating drivers must have a Receiver Radio. The
radio must be on at all times while your car is moving.
This is a form of communication for the track officials to
the driver. This radio is available for per event leasing,
or for purchase. It is the driver’s responsibility to have
this form of communication.
Scoring can be relevant to communication. You MUST HAVE
THIS RADIO TO RACE IN A CHAMP SPRINT EVENT. This radio is
also used in other series you may participate in, please
call to find out if yours is compatible.
SECTION I. CHASSIS:
Chassis pass any test prescribed by the safety inspectors.
The roll cage must be of a four-post design. No dirt champ
cars. No elliptical (oval shaped) tubing used on or as
part of the main frame structure.
Minimum wheel-base of 83 inches, maximum wheel-base of 90
inches. No pieces may be added to the frame so as to
resemble, imitate or be specifically designed to deflect,
trap or form a wind break of any nature, except those used
to cool/protect the motor and braking system. No roadster
type chassis allowed, only sprint appearing type bodies,
tails and hood will be allowed.
Titanium front axles nerf bars and/or rear bumpers will
not be permitted. Nerf bars and rear bumpers must be made
from magnetic steel and/or stainless steel. Left and Right
Nerf bars must attach to the chassis at three points. The
bumpers must be a minimum of one (1) inch in diameter and
have a minimum material thickness of .065 inches. The nerf
bars must not extend past the outside edge of the tires.
No aluminum frames or draglinks. Tie Rods and Left Front
Radius Rods may be aluminum, but highly recommended they
be 4130 steel with magnetic steel rod ends. Swaging of the
tubing will not be permitted. The drag links must be
tethered to the frame with a minimum of one (1) inch nylon
Carbon Fiber connecting rods having to do with suspension
or steering are not permitted.
All drive lines must be broken in the coupler or rear
slider, fully enclosed and contains no more than one
U-joint or C-V joint. No torque arm drive lines allowed. A
safety strap or hoop that is securely attached to the
chassis is required. Driveline components may not be
Headers: Must be a minimum of .045. Steel, Aluminum or
Titanium brake rotors only.
The maximum distance from the leading edge of the front
bumper to the leading edge of the front torsion tube is a
maximum of 8". The maximum distance from the leading edge
of the front bumper to the leading edge of the front axle
is 23 1/2 inches.
No hollow, tubular or drilled out bolts allowed.
The right side opening must be a minimum of 10 inches
vertical at any point and 21 inches horizontal.
The right side panel (armguard) will be permitted to
extend a maximum of 7 inches as measured from the outside
edge of the middle frame rail and must remain above the
middle frame rail.
SECTION II. WINGS:
Center Foil maximum size of 25 square feet with a maximum
width of 60 inches with a one degree plus or minus
Center Foil shall be fully sheathed in aluminum. Vent
holes are strictly prohibited.
No wicker bills or Gurney lips permitted on Center Foil,
unless center foil is totally flat then a two-inch
wickerbill is allowed.
No moving parts allowed on or in foil structure. No
hydraulic sliders or cockpit adjustments of any kind.
The 12-inch section located at the rear of the Center Foil
must not have the belly/curl arc out of
proportion with the rest of the Center Foil. The
belly/curl arc must span the entire length of the Center
Foil and appear to be a gradual arc with the deepest point
no further back than 48 inches from the leading edge. As
measured on a 12-inch straight edge, the belly at 6 inches
from the rear of the Foil may not be deeper than ½ inch.
There is zero tolerance on this ½ inch depth. It is
suggested that the wing blue print specify 15/32-inch
depth, so that if any deflection or movement of the wing
occurs, the depth will not exceed the ½ inch
specification. (This ½ inch measurement ensures that the
belly/curl arc is gradual.)
The belly/curl arc must start at the radius of the Center
Foil’s leading edge and shall not exceed a depth of 2½
inches. Center Foil thickness cannot exceed 9 inches.
Center Foil top surface from side to side must remain
flat. Center Foil must be one-piece construction. No split
or bi-wings will be permitted.
Wings must be fabricated of metal alloys only. No
fiberglass, carbon fiber or other similar material may be
used in the basic framework of the wings. Top wing must
not extend beyond outside of rear tires.
Two stationary foils or rudders will be allowed to run the
entire length of the underneath portion of the top wing.
Maximum height proportions are 1 inch at the front and 3
inches at the rear. Nowhere shall the foil exceed 3 inches
in height. The top wing can be cockpit/driver adjustable.
Wing T-Post will be built from 1” X .083” minimum ASTM4130
normalized steel or equivalent material.
Wing attachment designs will be subject to approval. The
only cast pieces approved will be HRP Part
#HRP8811-A75-HD. If new T-Post designs are developed they
must be submitted for approval. Some approved T-Post
designs are in the drawings section (See illustration
Center Foil maximum size of 6 square feet with a maximum
width of 36 inches with a one degree plus or minus
Center Foil shall be fully sheathed in aluminum. No vent
Wicker bills up to 1-inch are allowed on nose wing, flat
Maximum distance from the Center Foil front edge to the
front edge of the front axle may not exceed 20 inches.
The Center Foil front edge must remain at least 1 inch
behind the front edge of the front bumper.
Center Foil top surface from side to side must remain
Center Foil must be one piece. No split or bi-wings will
Wings must be fabricated of metal alloys only. No
fiberglass, carbon fiber or other similar material may be
used in the basic framework of the wings.
The Front Wing must not extend beyond outside of front
tires. The Front Wing may not be cockpit or driver
adjustable while the car is stationary or in motion.
No moving parts allowed on or in foil structure.
The 5” section located at the rear of the front foil must
not have a bell/curl arc that is out of proportion with
the rest of the front foil. As measured on a 5-inch
straight edge, the belly at 2 ½ inches from the rear of
the foil may not be deeper than 3/8 inch. There is zero
tolerance on this 3/8-inch depth. It is suggested that the
wing blue print specify 11/32-inch depth, so that if any
deflection or movement of the wing occurs, the depth will
not exceed the 3/8-inch specification (This 3/8 inch
measurement ensures that the belly/curl arc is gradual).
The belly/curl arc must span the entire length of the
front foil and appear to be a gradual arc with the deepest
point, no further back than 12 inches from the leading
edge. The belly/curl arc must start at the front foil’s
leading edge and shall not exceed a depth of 2 inches. Top
foil thickness cannot exceed 3.6 inches.
No rudders or fins on Front Wings.
Side Board Panels:
All side board panels must be within an eight-degree plus
or minus tolerance and be square to center foil.
Side panels may not be supported by braces whose section
is not horizontal. All braces or supports shall be
oriented thin edge to face the air stream. Only
rectangular, round or oval metal braces not exceeding 1
inch in width may be used.
No aero section side panel brace material allowed.
No brace or support shall resemble a wicker bill or a
Top Wing, sideboards maximum size, 72 inches long and 30
inches tall. Panels must be of one- piece construction.
Panels must be fabricated flat so as to have no turnouts
or flaps made of more than 2 inches of material on the
front or rear of panel and no more than 1 1/4 inches on
the top or bottom.
Panels must be mounted parallel and square to the center
foil with no more then 1 1/2” of turnout as measured from
the Center Foil. Only two (2) corners on the 2/3 of each
top wing side board will be permitted. Each corner shall
be set at a 90º angle with no tolerance. The leading edge
of the side board may not be behind the leading edge of
the Center Foil.
Front Wing side boards maximum size, 12 inches tall and 26
inches long with no more than one inch overhang from the
center foil front edge to the side board front edge.
Sideboards may have front, back, top and bottom turnouts
of no more than 1/2 inch.
SECTION III. TIRES
Right Rear must be IMCA or ASCS Hoosier Racing Tire,
105x16.0-15 Medium OR 105x18.0-15 HARD.
SECTION IV. BRAKES:
All participating cars must have minimum of one brake on
the front and one brake on the rear. No carbon fiber brake
components. Brakes must be in working order. Open to
inspection at any time. If your brakes are not working
before a race you will not race. Brakes must be hydraulic
SECTION V. FUEL:
Methanol fuel only. No additives OF ANY KIND allowed. Fuel
will be tested frequently and randomly. No oxidizers of
any kind. Fuel infractions are subject to
DISQUALIFICATION, FINES, and the possibility of complete
REMOVAL from any further competition. This includes the
OWNER AND DRIVER. THIS IS A NOT NEGOTIABLE OR TOLERABLE.
SECTION VI. WEIGHT RULES:
Weight rule is 1475 lbs., including the driver, at the
conclusion of the race. Any bolt-on weight must be painted
white and the car number must be on the weight. Loss of
any bolt-on weight during competition will disqualify the
individual from that event. The weight must be securely
attached and must remain in place during a race. It must
not be moved or removed during a red flag situation. We
reserve the right to disqualify any individual whose
weight mounting procedure does not meet our
specifications. (see illustration below)
SECTION VII. ENGINES:
OPTION 1: Champ Sprint Engine Rules:
368 Cubic inch maximum displacement. Steel blocks only.
Flat top pistons only, (no protrusions above piston face),
No internal reciprocating parts made of aluminum or
titanium or anything other than steel.
Water pumps to remain in the stock location and must be
belt driven. Wet sump oil systems only, no external oil
pumps or tanks of any kind. All competitors’ engines are
subject to inspection at any time.
No crank trigger ignition systems allowed. Any steel rod
or crankshaft may be used. No titanium engine part will be
allowed except valves and valve spring retainers. Camshaft
is optional. No overhead cams.
Gear drive ok. All oil pans must have a one inch
inspection plug. Pans without plug will be subject to pan
removal at any time.
OPTION 2: IMCA Racesaver 305 Engine Rules:
Must be 100% IMCA Racesaver legal to the 2020 IMCA
Rulebook. Absolutely no mixing of rules.
SECTION VIII. CYLINDER HEADS:
BRODIX SPECIFIED CYLINDER HEADS PART # CHEVEROLET SP-CH
FORD SP-FO MOPAR SP- MO
All spec heads will be supplied with CNC bowl blend and
intake matching from Brodix.
No grinding or blending of CNC work is allowed.
No grinding or polishing of any kind is allowed anywhere
on the castings.
No use of any substance that may change or alter the shape
or size of the ports or combustion chambers is allowed.
Valve seats and guides are to remain as manufactured and
in the cast position, valve must stay on the valve seat
and cannot touch aluminum.
Valve angles are to remain as manufactured. The original
seat center locations as provided by the manufacturer may
not be altered.
No tapering or reshaping or the valve guides is allowed.
No minimum combustion volume.
Serial #'s must remain on the head and must not be altered
No welding modifications are allowed to the original
castings. Brodix will provide repairs and
Valve stem may be no smaller than 11/32.
IMCA spec heads ok! Straight plug only!
The ONLY steel cylinder heads allowed for competition are
original production for Chevrolet only. No aftermarket
steel or aluminum cylinder heads are allowed other than
the specified head. Porting and Polishing of the steel
stock production head is legal. Ford and Mopar cylinder
heads must be the specified Brodix head. Shaft mounted
roller rockers are ok.
SECTION IX. CARBURETORS:
One 500 cfm holly 0-4412 5 point check legal carburetor.
Venturi Bore Primary 1.373-1.377
Booster O.D. .620 (+or-) .010
Booster I.D. .380 (+or-) .003
Booster Height or Length .434 (+or-) .010 Throttle Bore
Throttle shaft & Plate thickness Pri .1868-.2008
These dimensions will be checked with a go-no-go gauge.
Carburetors with injectors inside are illegal.
No air leak device of any kind.
OEM or stock type cast aluminum allowed. May be ported
only to match heads. No welding, grinding, cutting,
porting, polishing anywhere on intake EXCEPT for one inch
maximum inside intake runners to match heads. No plastic
SECTION X. MUFFLERS:
You must run mufflers. Schoenfeld 112535 or 14272735-78 is
required. No inserts. Loss of muffler will result in
SECTION XI. TRACTION CONTROL:
Traction Control devices of any kind is not allowed.
Electrical boxes or spark boxes and all wiring must be out
of cockpit area. Anyone found with Traction control
devices are subject to permanent removal from any
competition indefinitely. All violators will be noted to
all other sanction bodies.
SECTION XII IN-CAR ADJUSTMENTS:
In-car adjustments are not allowed under race conditions.
This includes but not limited to, Torsion Bar, Shocks,
Wings, Fuel, etc.
SECTION XIII. RULES AND PROTEST:
All protest will be handled by the race director. All
decisions are final. Any competitor wanting to protest
must bring the protest fee of $300.00 in cash within 15
minutes of checkered flag for the event protesting. At
this time the race director will determine if this protest
item can be evaluated at the race track or if outside
facilities are necessary. All competitors must comply or a
guilty plea will be applied.
Fines and penalties will be determined the track within 48
hrs. All moneys will be held until the
If the protest finds legal then the protesters money will
be awarded to the complying contestant minus 25.00 for
fees. If the part or parts are found to be illegal then
the protester will be awarded his/her protest fees back
minus 25.00 fees. The only people that can protest are the
registered owners of a competing car in that event. The
owner must bring the protest with fees in person. Drivers,
crew members, wives, children, etc. are not eligible
protesters unless they are owners of a car in that event.
WE STRONGLY SUGGEST IF YOU ARE IN A GRAY AREA THAT YOU
FIND OUT. QUESTIONS ARE VALUED AND APPRECIATED. DON'T