SENECA SUPER
TRUCK (Pro Trucks)
2008 RULES
COMPETING
MODELS
1996-2008 truck
models with a minimum wheelbase of 112” Wheelbase.
TRUCK
BODIES
Aftermarket
Stock appearing bodies allowed.
Aftermarket body
must meet speedway template specifications.
All trucks must
be painted and lettered professionally.
Hood must fit to
windshield.
Rocker panels
may be fabricated but must maintain 4” ground clearance.
No “panning”
underside of truck.
Front and rear
windshields must be lexan. No side or quarter windows.
Speedway
approved window net must be installed in the driver’s side window opening.
Body
height minimum 4 inches, roof height minimum 56 inches with driver measured 10”
behind windshield.
Rear
spoiler 5” high with maximum 60” width. Spoiler must be self-supporting.
Wrecker hookup
required on front and rear of truck.
FRAME
Tubing front sub
frame allowed. Stock OEM front sub frame allowed.
Frame rails
minimum 2”x 3” x .083 wall thickness between wheels.
Frames must be
perimeter style. Front and Rear sub-frames must be centered to roll cage.
Chassis rails
must maintain 4” ground clearance with driver.
A steel interior
must separate the driver from the engine compartment and fuel tank. A metal
dash must be in installed in the driver’s compartment.
Floorboard may
be raised ten inches to the drive shaft tunnel to the top of the door bar and
seal off to allow clearance for headers. No boxed interiors.
ROLL
CAGE
A complete
speedway approved roll cage.
Roll cage must
be constructed of roll bar tubing with a minimum outside diameter of one and
three-quarter 1 ¾” inches x .083 wall thickness.
Trucks must have
a center windshield protector bar 1 ½”x.065 tubing
Roll cage must
be centered on the main frame rails. Perimeter style.
Main roll cage
uprights must be on top of the frame rails.
Full cage is
required with four uprights and four top bars.
Minimum of four
bars in driver’s and passenger’s door required.
Driver’s door
bars must be covered with metal for safety.
All roll bars
within drivers reach must be padded.
FRONT
SUSPENSION
Coil-over
suspension allowed.
Screw Jacks
allowed on front and rear
Fabricated
spindles allowed.
Lower A-frames
may be Fabricated or aftermarket.
Front lower
control arms may be strut rod.
Upper A-frames
may be fabricated.
Front sway bar
may be OEM or Aftermarket design.
No titanium
suspension parts allowed.
STEERING
Rack and Pinion
steering allowed.
OEM type
steering and steering box allowed.
Steering
components may be aftermarket.
Any type of
steering or power steering allowed.
REAR
SUSPENSION
Three link, leaf
spring or truck arm suspension allowed.
A metal
fabricated pan-hard bar is allowed.
Damper shock
permitted on rear suspension.
Rubber bushing,
metal bushing, teflon
bushings or heim joints allowed.
Three link lower
trailing arms may be metal tubing.
Truck arms must
be magnetic steel.
Rear sway bar
not permitted.
No Titanium rear
suspension parts allowed.
REAR
END
Rear end may be
car, truck, floater, or standard 9”quick change.
No cambered rear
ends. +/- .4 Grace. No aluminum tubes. No aluminum
yokes.
Detroit
Locker or spool only. No torque limiting devices allowed.
Only steel third
members (9 inch chunks) allowed.
No titanium rear
end parts allowed
SPRINGS
and SHOCKS
Tie rod or
spherical end shocks allowed.
Shock claim
rule, $150 per shock (must claim all four) by speedway or any driver that
completed the super truck race. Complete shock minus hardware.
Coil springs
minimum diameter 2 ½”.
One spring and
shock per wheel.
BRAKES
Multi piston metal
brake calipers permitted. Maximum 4 pistons per wheel allowed.
Steel disc
brakes may be used on front and rear. All 4 wheels must work.
No titanium
brake parts allowed.
WHEELBASE
and TREADWIDTH
112”
minimum.
Trucks must not
exceed the maximum allowable tread width of 65 ½” inches.
CRATE
ENGINES
The Following
Crate Engines must be used as supplied from factory manufacturer
with a speedway seal on engine. These engines are subject to tear down
procedures and legalities is determined by tech
committee. These engines may require different size carbs
to equal horsepower between different model #.
GM
#88958602 Dodge #5007949 Ford# TBD
GM #88958603
These engines are designed to cut the cost of racing.
Anyone found tampering with these engines will be fined up to $1000 for each
offense and loss of championship points.
ENGINE
Only standard
production engines allowed. Chevrolet 350 cubic inch maximum, Ford 351 cubic
inch, Chrysler 360 cubic inch plus overbore.
No polishing or
coating inside of block.
Overbore of .045
permitted.
Aftermarket
solid steel connecting rods permitted. No polishing or machine work will be
permitted.
Flat top 3 ring
pistons permitted. Piston must not extend above top of block.
Crankshaft with
stock stroke must be retained. Crankshaft minimum weigh 50# pounds. Machining for balancing only. Crankshaft must not be
Knife-edged.
Wet
sump oil system only. No external oil pumps allowed.
Enlarged oil pan
allowed.
Aftermarket
valve covers allowed.
Aftermarket
pulleys allowed.
HEADS
Speedway
approved cast iron steel heads required. Chevrolet bowtie, Ford SVO, Mopar
NO
modifications, no porting or polishing. No grinding of any kind. 3 angle valve
job ok as per Speedway rule. One cut below valve seat, to bottom of valve
guide. Do not radius or blend bottom of cut below valve seat.
Chevrolet
62cc minimum; Ford (clev) 62cc minimum; Ford (win)
58cc Chrysler 62cc minimum.
OEM valve size
for cylinder head required. Steel valves required.
CAM SHAFT
Hydraulic
or flat tappet cam and OEM diameter lifters. No roller cams
allowed.
Any steel type
timing chain allowed.
Any type valve
springs and retainers allowed. Stud girdles are permitted.
Screw in studs
and guide plates permitted with any ratio roller rocker arms allowed.
INTAKE
and SPACER
GM performer
2101, Ford performer 2750, 2176, M9424-C358 Cleveland performer #2665 and
Chrysler casting P#4532852, P5249572AB. No Magnesium intakes.
No porting,
polishing, or grinding will be permitted. Do not touch it.
Only a one-piece
solid aluminum spacer, ¾” thickness may be installed between intake manifold
and carburetor.
Holley 4bbl carbs allowed a solid aluminum spacer, 1” thickness four hole or open.
Holley #7448
spacer must have 2 holes with 1 ½” openings.
Holes must be
centered and cut perpendicular with the base of the carburetor. No tapers or
bevels.
Only 2 gaskets,
1 per side, maximum thickness .065 will be permitted.
No adjustable
spacer will be permitted. No other modifications will be permitted.
8. All spacer
plates must meet speedway specifications.
CARBURETOR
The following carburetors will be eligible
for competition.
Holley
2300 2bbl carb. model
#7448 “350” with a venturi size of 1 3/16”.
Holley
2300 2bbl carb. model
#4412 mounted on a 7448 throttle plate w/ ring. “450”
Holley HP80507-1
390 cfm four barrel model HP designed for crate
engines
See below for rework guidelines:
No polishing,
grinding or drilling holes will be permitted in the body of the carburetor.
Boosters may not
be altered in any manner including size, shape or height.
Venturi area must not
be altered in any manner. Casting ring must not be removed.
Base plate must
not be altered in shape or size.
Stock
butterflies must not be thinned or tapered. Idle holes may be drilled in
butterflies. Screw ends may be cut even with shafts, but screw heads must
remain standard.
Throttle shafts
must remain standard and must not be cut or thinned in any manner.
Any attempt to
pull outside air other than through the venturi is
not permitted.
All carburetors
must meet speedway specifications
DMS “built” engine must use: Holley #7448 2bbl “350”
GM #88958602 Crate engine may use: Holley HP80507-1 390 four barrel carburetor
GM #88958603 ZZ4 Crate engine may use: Holley HP80507-1 390 four barrel
carburetor.
Dodge #5007949 Crate engine may use: Holley HP80507-1
390 four barrel carburetor
Ford# TBD
AIR
CLEANER
Round air
cleaner element minimum of 12 inches; maximum of 17 inches in diameter
permitted. Front facial may only be half the diameter.
Top and bottom
of air cleaner must be the same size.
Element must be
minimum of 1 ½ “and a maximum of 4 inches in height.
Dry type paper
element only.
No tubes,
funnels or anything which may control the flow of air are permitted.
Base of air
cleaner cannot extend higher than carburetor choke horn.
Base of air
cleaner on 4 barrel carb no more than 1 ½”above
mounting ring of carb.
8.
No cold air boxes or cowl induction allowed.
TRANSMISSION
and FLYWHEEL ASSEMBLY
Automatic, 3 or
4 speed transmissions permitted. May be interchanged.
All gears must
be in working order. Muncie can take out first and second gear for safety.
2-speed
transmissions, or “speed” transmission allowed. See weight.
No centrifugal
clutch transmissions allowed.
All trucks must
run a steel flywheel in original location.
A metal
Multi-disc clutch allowed. Minimum disc diameter 5 ½”.
Hydraulic clutch
control permitted.
Blowproof bellhousing required. Must have speedway approved scatter
shield or steel bell housing. No reverse mount starter bellhousings.
Bottom of bell
housing may be cut for clutch service, inspection and ground clearance.
Drive shaft may
be steel or aluminum. Drive shaft must be painted white or silver with safety
loops attached to the bottom of truck.
EXHAUST
Headers will be
permitted. H-pipes allowed.
Four pipe
collectors required with no merge pipes.
Header wrap or
coating allowed.
OEM stock cast
iron manifolds permitted.
All exhaust must
exit behind the driver.
ENGINE
LOCATION
Engines may be
interchanged from one body manufacturer to another.
Chevrolet engine
must be centered in chassis (+/- ½”) and center of #1 spark plug may be setback
2” maximum with the upper ball joint as ran in race.
Minimum
crankshaft height is 12”, measured from the center of crank pulley to the
ground.
Ford and Dodge
engines check with speedway director for location and which spark plug.
COOLING
SYSTEM
Aluminum
radiators permitted. Internal or External oil cooler allowed.
All trucks must
have catch can mounted under hood or trunk.
Antifreeze is
not permitted. ($200 fine)
Electric fans
are permitted.
ELECTRICAL
SYSTEM
Electronic or
point type ignition allowed.
Only 1 stock
appearing coil permitted. Aftermarket distributor allowed on all engines.
Only one 12-volt
battery permitted. Stock firing order required.
Only one MSD
ignition box permitted. No magnetos. No adjustable timing controls.
MSD claim rule,
$300 by speedway or any driver that completed the truck series race.
Ignition box
must be visible and out of the reach of the driver.
Starter must
mount in original location.
No open ended
wiring in driver’s compartment.
Tachometer must
be able to unhook. No digital readout gauges.
Any type
traction devices are not allowed. No computerized systems are allowed.
All ignition
systems must be acceptable to speedway officials.
FUEL
and FUEL SYSTEM
Speedway fuel is
the only fuel allowed. No mixtures of any kind.
All Fuel must
pass Speedway Fuel specifications.
Fuel cells are
mandatory and mounting of them must be speedway approved for safety.
Fuel cells must
be securely strapped down with no less than 1/8” steel straps.
The maximum
capacity allowed is 22 gallons.
Fuel cells must
have 8” minimum ground clearance.
Fuel cell must
be mounted in approved steel can.
Fuel may be
added for weight check.
WHEELS
and TIRES
10” Maximum
width. 15” Steel wheels only.
Air bleeders
will not be permitted.
Tires used for
qualifying and race must be approved by the speedway.
Any truck tires
from any source other than speedway supplier will be disqualified, a $500 fine
imposed.
No chemical tire
treatment allowed. Durometer and sniffer enforced.
WEIGHT
***Trucks equipped with DMS “built” engine with “350” carb***
2800 pounds total
weight with driver.
1200 pounds minimum
right side weight with driver.
***Trucks
equipped with DMS “built” engine with “450” carb***
2950 pounds total
weight with driver.
1270 pounds minimum
right side weight with driver.
*********************************************************
Crate engines
will be given a fifty pound weight break. MB 2006
Two speed, or
“speed transmissions” must add fifty pounds to total weight.
All trucks will
be weighed with driver in a driving position.
Weight of trucks
may be increased or decreased to assure an equal race program.
All lead weight
must be added to chassis securely.
No tungsten
allowed.
AMMENDMENTS
These rules are
subject to amendments for competition when ample notice has been given by the
speedway.
Speedway
officials may use professional judgment for any rule or infractions for a
competitive race program. Any truck that does not conform to any of the
above rules may be required too add weight and/or
restrictor plate determined by the tech committee.
Speedway
reserves the right to approve any engine parts, chassis or body parts that were
approved for use in the LMSTS that began in 1996.
Rev
5/01/08
****Any
rules you do not understand please contact speedway officials for
clarification.