35 Raceway Park
2014 Sport Mod Rules
Safety see 35 Raceway Park
Chassis, Frames and Bodies
UMP/AMRA/TSMA Modified frame and body rules
with the following exceptions:
-No coil over shocks
-No tubular front clips allowed.
-Air shocks not allowed.
-All coil springs must be at least four and one
half inches outside diameter. Steel
-Canister and/or adjustable shocks are not allowed.
1. Bumpers should be on both front and
rear. Front bumper should be mounted frame end to frame end with the
bottom loop parallel to the ground and 6.5″ apart from the top loop.
Should be made of minimum of
1 ¼” tubing and must be able to support car
if lifted by wrecker.
2. Rear bumper and body must not extend beyond
width of rear tires.
3. Nerf bars must not extend beyond width of rear
tires and must not contain any sharp edges. Open tubes must be capped.
4. Rear bumper may be constructed of tubing or flat
stock, and must protect fuel cell. Center of bumper, front and
rear, must be 18″ from ground. (2″ tolerance). No wider than 5″ past the
rear frame rails. Open tubes must be capped.
1. Must consist of continuous hoops not
less than 1.50 inch diameter and must have a wall thickness of at least
2. Must be frame-mounted in at least 6 places. Roll
bar padding required in driver compartment.
3. Must consist of a configuration of front to rear
hoops connected by tubing on the sides or side hoops.
Driver’s head should not protrude above the
cage with helmet
on and strapped in driver’s seat.
Roll cage must be securely supported and
4. Low carbon, mild steel tubing is recommended. No
brazing or soldering allowed.
5. Protection of feet is mandatory. Bar across back
of engines with vertical bars and rub rails, or similar protection.
6. No brace bars forward of cage may be higher than
stock put height.
7. A minimum of 3 driver side door bars must be
parallel with the ground as possible and located perpendicular
to the driver so as to provide maximum
protection for driver, but without causing undue difficulty in getting
in or out of the vehicle. The sidebars must be welded to the front and
rear of the roll cage members. No brazing or soldering allowed. Door
bars less than .095 thickness should have 4 bars at least 1-½ inches in
Driver doorplates required (5″ in front of
seat to rear of seat).
Brakes must be operated on all 4 wheels and
must lock up all 4 wheels during inspection. Brake pedal balance bar
only adjusting device allowed on car. No Rear Axle Brake Floater
Allowed, Caliper brackets must be solid mounted to the rear-end housing.
No pressure limiting or check valves allowed. All frt. brake rotors
subject to OEM minimum thickness. Rear rotors .810 minimum
Front must be vented.
Gasoline ONLY, no alcohol. Racing fuel is
2,500 pounds for all cars.
One 12 volt battery must be securely
mounted and shielded inside frame rails. (Marine type battery box
recommended). The (+) cable must be covered. All positive posts must be
1. OEM Manual Transmission. Must use stock
cases, bearing plates and tail shaft housings for make and model trans
being used. At least 1 forward gear and 1 reverse gear must work. No
mini clutches. Cast iron flywheel, no aluminum. 10 and ½ minimum.
2. OEM Automatic Transmission. All forward and
reverse gears must be operational at time of inspection. Must have
working torque converter. 10 inch minimum
Drive shaft hoop is required and must be
constructed of at least ¼” by 2″ steel and should be mounted
at least 6″ back from front of drive shaft.
Drive shaft must be painted white. 2″minimum diameter steel shaft.
1. Any passenger car type or truck rear end
may be used. Floater recommended 2″ inspection plug recommended
to view Spool and/or gear. Carrier may need
to be removed if we cannot see what needs to be inspected.
2. No quick-change devices allowed. No cambered
rear ends allowed.
3. No limited slip devices allowed. May run full
spool, mini spool, or welded rear only. All Components Must be
Steel. No lightened or light weight components allowed.
4. 72″ between back of block and centerline of rear
5. Minimum Pan hard bar length 19″ center to center
of bolt holes. (2010 23inch rear mounted pan hard bar)
6. One pull bar or lift arm only. (2010 solid pull
bar centered over driveshaft)
7. No coil overs no where
8. Non gun-drilled axles.
9. All steel rear end. Except for drive caps on
floaters and aluminum spacers for leaf springs.
No lightweight spools or ring and pinions.
Tires and Wheels
1. 8 inch wheels.
2. No aluminum wheels, hubs, calipers or A-frames
or any other suspension parts allowed.
Plastic wheels are not allowed. Calipers
cannot be lightened and must be OEM. Rotors cannot be lightened or
3. Any 8 inch racing tire.
1. Engine Block-OEM
Cast Iron only. Maximum cubic inch limit of 390.
have a stock appearing rear crank flange. Balancing OK,
No lightening, knife edging or reducing of
the crankshaft circumference.. Must be cast iron crank, no steel.
3. Harmonic Balancer-Must
be of OEM design with rubber mounted dampener ring (SFI rating
4. Connecting Rods-Must
be of OEM design (IE If stock rod was “I-beam than Aftermarket must be
“I-beam). Rod length is up to engine builder (does not have to be OEM
length). Rods may use bolt and nut or cap screws to secure the caps.
5. Pistons- Cast or Forged, Flat top or Dished. No
domed or gas ported pistons allowed.
camshaft only. No roller camshafts allowed. Must pull 15 inches of
vacuum at 1000 RPM’s. Must have access to vacuum port in manifold. No
7. Cylinder Heads and
Valve Train-Must be unaltered approved OEM.
All heads must have been used in a
production vehicle. No limited production or special purpose over the
counter only heads allowed.
No porting, polishing or unapproved valve
bowl work or other alterations of any kind to heads or intake. 202’s
No screw in studs. No pin studs. Must use
stock diameter valve springs. Stock steel stamped rocker arms.
No beehive springs. No stud gridal. No
VORTEC heads. Poly locks ok. No canted value (Cleveland style) heads!
use aftermarket headers. Exhaust system must be mounted in such a way as
to direct spent
gases away from cockpit of vehicle and away
from areas of possible fuel spillage. Exhaust header outlets no higher
than midline of the body sides. Officials may require turn downs on the
collectors. Dual exhaust only
no “Y” pipes or 180 headers. No oxygen
Intake-Any cast iron or aluminum intake. No
porting or enlarging inside of intake or gasket matching. No Bowtie,
VORTEC, SVO or W2, marine or other special
production intake manifolds. No intake manifold to cylinder head spacers
10. Fuel Pump-OEM
style diaphragm pumps only.
FINALLY..... REMEMBER, THIS IS A DIVISION INTENDED FOR IN