2015 Grand National Sportsman Rules
MODELS (car bodies)
1960 or newer GM, AMC, Chrysler, Ford or U.S. manufactured auto,
pickups or station wagons. No convertibles allowed.
1978 to 1988 GM metric frames only. Frames must be X-ed; side
rails must be plated where open. Front cross member may be
notched and plated for fuel pump clearance only. Weight jacks or
screw jacks allowed. Frame rails behind rear spring pockets may
be cut and fabricated. Must have a minimum 108" (+ or -
1/2")wheel base. Upper control arm mount only may be notched for
shock clearance. No other improvements allowed except to repair
rusted or damaged areas.
Four-point roll cage constructed of 1 3/4" x .095" wall steel
round tubing. One front and one rear cross brace, recommended
height at 20". The main hoop behind driver must be cross braced
. Two passenger side and four driver side door bars, with driver
side door bars slated and having two upright bars between each
driver door bar. Wing window bars on drivers side mandatory;
passenger side recommended. Foot protection bar (may be plated
for added safety). Two front support bars must start at cross
brace height at roll cage corners and extend forward to frame.
Four rear support bars must extend to frame, two starting at the
rear cross race at roll cage corners and two from the top
corners of the rear cage hoop.
See diagram. Halo bar must have one crossbar running either
in front to back or diagonal made of 1-3/4" X .095" wall steel
High back aluminum racing seat is mandatory. Seat must be bolted
in with six 3/8" Grade 5 or Grade 8. Four bolts in the seat
bottom and two in the seat back. A window net with buckle
release mounted on the top left corner is required. All roll
cages must provide a minimum of two inches of clearance measured
from the top of the roll cage to the top of the drivers helmet
when driver is seated and strapped in driving position. The
center of the steering wheel must be padded and all roll bars
that the driver could contact must be adequately padded.
passenger car, stock or after market template/straight-up
style steel, aluminum or plastics front fenders. Hood must
be steel, aluminum or fiberglass and the back of the hood
must be sealed down completely. Door panels and rear
quarters to be stock or sheet metal or aluminum. No door
handles, locks moldings, factory plastic or chrome accent
pieces left on the stock panels. Factory or after market
plastic nose and tail pieces are okay. Rear of car, fender
to fender above bumper to be completely enclosed. Nose of
car must look stock appearing and neat looking - no wedge
type or late model noses. NO wedge type bodies. No holes in
hood or hood scoops. Hood pins to be used in hood and trunk.
Stainless steel windshield screen must be no less than .063"
for mesh larger than 1/2" or no less than .035" for 1/2" or
smaller mesh (no larger than 1" mesh screen allowed) to
cover entire opening with three upright braces top to bottom
of 3/8" or larger solid rod. Spoiler allowed on rear of
trunk lid not to exceed 6" high or wider than the width of
car and no sideboards. Two and one-half inch (2 1/2")
nonfunctional hood scoop allowed. RACERS - YOUR CAR MUST
LOOK STOCK TO RACE.
must be neat and well painted. Car numbers must be painted a
contrasting color and numbered between 00 and 99. Numbers
must be painted on both sides and roof to face grandstand.
Numbers must be at least 16" high and 3" wide. Numbers of
legible size must also be placed on the front and rear of
the car to aid in line-up.
The car, at
its widest point including rub rails, may not exceed 78".
no air induction of any type allowed.
windows allowed for safety reasons.
be in place and secured at all times to race.
Model style roof.
made production V-8 engine blocks only. Must be production
cast iron block with standard external measurements in all
respects with the exception of the permissible .060 over
bore maximum. No aluminum, Bowtie, Rocket, SVO, 'X', or 'R'
blocks allowed. No removing of identification numbers. No
grinding or lightening.
stock production crankshafts with I.D. numbers intact or
O.E.M. replacement (minimum 48 pounds). No light weight
cranks. No knife edging. No offset grinding. No undercut
counter weights. No drilled centers on bearing journals.
connecting rods only. Must remain stock length for the block
being used (except 400 Chevy may use 5.7 rod). No titanium
or aluminum rods. H beam allowed.
top or reverse dome piston may be used as long as it has the
stock wrist pin height for the engine being used (except 400
Chevy). Valve relief may be cut into the piston. No portion
of the piston may protrude above the top of the block.
Hydraulic or flat tappet steel camshaft with a maximum of
.500 lift measured at the retainer. Stock diameter tappets
only. No mushroom or roller tappets allowed. No stud girdles
or rev kits. Standard timing chain only - no gear drive or
belt drives will be allowed. Roller rockers and roller
tipped rockers allowed. No shaft rockers.
heads must be stock steel production or World Products S.R.
#'s 4266B, 4267B, 4360 or 4361, or Sportsman II heads #'s
1115, 1125, 1215 or 1225. If using Sportsman II heads you
will be allowed no more than 11.00 to 1 compression ratio.
No Bowtie, fuel injection type, SVO, W2, GT 40 or after
market heads allowed.
(PDTR will allow the use of GM Vortec steel heads with
casting numbers 10239906 and 12558062. There will be no
sanding, polishing, relieving, grinding, porting,
chemical treating, abrasive blasting to any part of the head
with the exception of machining to the valve spring pocket
to relieve spring bind and the shortening of the valve guide
to allow for valve lift. The addition or removal of
material to the ports or combustion chambers or any
alteration to the original form will not be allowed. The
valves must remain 1.50 inch exhaust and 1.94 inch intake
and at the stock 23 degree angle. The only intake manifolds
that will be allowed to be used with the Vortec heads will
be unaltered Edelbrock part numbers 2716, 2913 and 7516 no
Only two valves and
one spark plug per cylinder. No titanium parts in the valve train
allowed. Intake and exhaust ports must be in the original “as cast”
configuration. Any evidence of any sanding, polishing, relieving,
grinding, porting, chemical treating, abrasive blasting, alteration
to the original form or the addition of material to the ports or
combustion chambers is strictly forbidden. No external sanding,
grinding or removal of I.D. numbers or symbols. Valves must be stock
production size and in stock location. Small block Chevy maximum
valve size is 2.02” intake and 1.60” exhaust, measured across the
face of the valve. Stock production valve spring diameter for heads
used only. Screw in studs and guide plates allowed. No chemical or
ceramic work allowed in internal areas of intake or heads.
Standard cylinder head reconditioning procedures are ok, including
head surfacing to correct warping, valve guide reconditioning, and
valve seat reconditioning. All repair work done on valve seats must
not extend more than 1/4" away from the valve seat.
must remain in stock location. No dry sumps or external oil
pumps allowed. After market oil pans and breathers are
allowed. Oil cooler, if used, to be in engine compartment
production cast iron intakes on engines over 365 cubic inch.
Following aluminum intakes numbers allowed on 365 cubic inch
or less - GM: Victor Jr 2975 or 2972 and 2101, Weiand 7546
or 7547. Ford: 2981 or 2760 and 2665 or 2750, Cleveland 7516
or 7517. AMC: 2930 or 2035. Chrysler: 2915 or 2176.
Edelbrock: 7101 and 7501. After market or stock intakes to
remain untouched. NO Marine type intakes.
iron exhaust manifolds or inexpensive headers okay. No 180
degree headers or step headers. Exhaust must exit under car,
behind driver and be angled down. Mufflers are mandatory and
car must pass noise level test (95 decibel at 50 feet)
Recommended mufflers are Dynomax Bullet 24216 or Flomaster
type ignition, no Multi-spark discharge or mags. Rev
limiters allowed, one chip system only.
One (two or
four barrel) carburetor only with maximum spacer height of 1
1/4". Two return springs mandatory. No throttle cables
allowed, must be mechanical linkage. Toe strap on gas pedal
iron or after market aluminum water pump.
radiator stock brass or aluminum in front of motor. Metal
Shroud to cover top 180 degrees of fan. No electric fans.
Absolutely no anti-freeze in radiator. Two-quart overflow
Mini-Starter allowed. No reverse mounted starter. Must be
able to start car.
be centered between frame rails. Engine Set-Back to be
measured as 33 1\2” from top steering box mounting bolt to
rear of engine and 15 1\2” from steering box mounting bolt
to #1 cylinder spark plug. Crankshaft centerline can be no
less than 7 1/2" from bottom of front cross member.
control devices allowed.
inspection window recommended in the oil pan (effective in
2009).The window should be located on the left side of the
oil pan between the number 5 and number 7 rod journals. If
there is no 1" window and an inspection of the engine is
necessary, you will be required to remove the oil pan or
the oil so access can be gained through the drain hole.
AND DRIVE TRAIN
proof bell housing only. Upper 270 degrees of bell housing
must remain in tact.
be stock or after market aluminum. No cut down stock
minimum diameter, steel or aluminum, single or multi disc
clutches allowed. No spoke type flex plates allowed. OEM or
OEM replacement flex plates only.
manufactured passenger car or light truck three or four
speed unaltered manual or automatic transmission. The
following after market transmissions allowed: Brin part#
BR170001, Falcon part # WIN60100, Bert part # BERLMZ,
Racegator part# 140002. If automatic, must use stock torque
to be steel, painted white, and have safety loop of minimum
1" X 1/8" thickness located within one foot of front
end for frame used or Ford 9" floater recommended. Any
combination okay so long as parts are steel. No aluminum
parts except drive plates and spools. No off set. Drive
flanges to be of equal distance on both sides of frame. No
independent rear end (Corvette, Jaquar). Rear trailing arms
must remain mounted in stock frame locations. One hole upper
and lower for each trailing arm mount location, multiple
hole trailing arm brackets allowed. No after market limited
slip or ratchet style rear ends. (Example: Gold Track, True
Track or Gleason, etc.)
wheel to be quick release style.
steering box and linkage only. Steering quickner allowed.
Steering shaft must have 2 U-joints or be collapsible style.
intermediate metric lower "A" arms only. Stock unaltered
intermediate metric spindles and rotors except for wheel
bolt pattern and hole for outer tie-rod end. No after-market
or dropped spindles. One steel unaltered shock per wheel at
any mounting position. No externally adjustable, coil
over, air or remote reservoir shocks. No Schroeder or gas
refill ports. No coil over eliminators. A Coleman hub may be
used on the front only.
A-frame, trailing arms, steering components and suspension
mountings must remain stock for frame, in factory frame
position. Outer tie-rods ends may be replaced by 0.625 or
larger steel heim joint with a solid (no seam) steel
adjuster sleeves and jan nut only. Rear trailing arms may be
aftermarket. Must be stock length and use bushings. No heims,
mono balls or adjustable. Length measured center to center ,
upper 11-1/8", lower 19-1/4", one solid piece. Must be same
measurement side to side.
dimension intermediate metric ball joints only.
type sway bar permitted.
control arm may be replaced with complete steel tubular drop
in replacement, one-piece control arm of stock length (8”),
plus or minus �” of stock length using stock ball joints.
No aluminum components allowed.
Bushing Replacement – Stock or plastic and grease-able
bushings allowed. NO OFFSET, BEARING TYPE or MONO BALL
Four wheel foot operated hydraulic brakes in working order. Dual
master cylinder allowed. Limiting or proportioning valves okay.
GM Metric frames must use unaltered GM Metric calipers only. No
aluminum, after market caliper replacements.
FUEL AND TANKS
only including E85.
fuel cell to be enclosed in 22 gauge sheet metal with 2
straps in both directions. Straps to be 1" X 1/8" steel.
Ground clearance of 10". Fuel cell protection bar on the
bottom (as low as fuel cell). Minimum of 1 1/2" X .065 wall
square tubing fuel cell hoop with two or more braces to
frame. (One on each side of the fuel cell.) Fuel cell to be
filled from top and have approved cap. No fuel lines in
fuel pump in stock location. No electric or belt drive
draw fuel cells. Outlet must be on top.
cell breather or vent must have a one-way check valve to
prevent spillage in case of a rollover.
bumpers may be reinforced, ends must be strapped to fenders.
Must have both bumpers to race. Radiator protection bar may
be no higher than the front of the hood or exceed 8” above
the frame rail and no wider than the frame rails and may not
extend beyond the front of the bumper. Trunk protection bar
no higher than rear of trunk lid. Protection bars to be 1
3/4" X .095 wall round tubing or smaller. Side protection
bars to be no larger than 1" X 0.095 wall square tubing
with the ends capped at 45-degree angle.
must have a loop, hook or other provision in the centerline
of the front and back, behind the bumper line for the
wrecker to hook on to.
steel wheels of 8" maximum width. Bead locks are allowed on
steel lug nut mandatory. Studs must pass through lug nut
"E-MOD RC-4" size 26.5/8.0 -15 or 27.5 /8-15 tires only. No
grooving, sipping or softening allowed.
Durometer or sniffer (100 parts per million maximum)
12 volt electrical system only. One 12-volt battery only, which
must be located behind driver area and securely fastened. On/off
and start switch to be clearly marked in driver area and easily
reached by driver and safety crew. It is recommended to have a
main battery kill switch located behind the driver.
Weights to be bolted securely, (bolts must pass through frame,
minimum 1/2" bolts) and painted white with car number and
division on each weight. Loss of weight during a race will
disqualify driver from race. No weights in driver’s compartment
Absolutely no mirrors allowed.
Listed under PDTR Track Rules.
IMCA STOCK CAR
CROSS-OVER RULE IMCA
Stock Cars must run their rules with the exception of using
Hoosier “E-MOD RC-4” tires. There is a 4-week limitation on this
rule. If the car runs more than 4 weeks, it must meet either
Grand National rules or run full IMCA Stock Car rules
- EASTERN WISCONSIN STREET STOCK CAR
Eastern Wisconsin Street Stocks may run in the Grand National
division and must meet Eastern Wisconsin Street Stock rules. (No
Drivers must be at least 16 years of age. 14 and 15 year olds
may race with prior approval from PDTR Office and PDTR
Transponder must be placed 24" or more, behind the center line
of the rear axel to the forward edge of the transponder, on the
right side frame
window bars (mandatory)
base (108" minimum)
Mandatory safety plating (1/2" steel minimum)
frame this point forward
frame tail section (2: x 3: x .095 wall steel tubing)
cell can (mandatory) (Material: 20 gauge steel)
area protection bar (mandatory)
shaded bars may be .065 1-1/2" K.065 min.
cages must have these front & rear support hoops/bars
.065 fuel cell guard
Approved racing window net (mandatory)
Recommended door/bar length 44"
door/bar uprights between each door/bar (mandatory)
door/bars evenly spaced on driver's side (mandatory)
**Note** All driver's side door/bar material minimum
1-2/4" x .095"
plating material (4" x 1/8") flat strip steel
cage main/hoop setback 82-1/2" measured from center of
lower ball/joint to back of main/hoop tubing
Mandatory x-brace (choose 1, no mixing of materials)
Driver's compartment safety bar (same material as
cell safety straps (min. 4), 1" x 1/8" strap steel
section replacement same dimensions as stock frame
plate 1/8" steel place, minimum width 20" at seat.
**NOTE** x-brace must tie in to original frame, not
highly recommended that the main hoop (vertical to
frame) be 39" from the top of the frame. Floor pan must
be mounted to the top of the X bracing.
Door-bars should be flush to door panel (with the body)
Door-bar height , minimum 20" high from top of frame.
pan, minimum 20" wide in driver's seat area.
main hoop/head rest bar (optional).
Cross-bar recommended height 20" (for shoulder harness)
Roof-hoop to fit roof side to side, minimum length 34"
Roll-cage width same as stock frame width.