Madison International Speedway    

2014 Truck Rules

Updated 1/31/14 (Download PDF)




The Guidelines 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 guidelines shall

govern the condition of events and participation therein. They are intended as a guide for the conduct of

events and are in no way a guarantee against injury or death to a participant, spectator, or official. The

Tech Director, or his authorized designate, shall be empowered to permit minor deviation from any of the

guidelines and or regulations herein, or impose any further restriction, which, in his or her opinion, does

not alter the purpose of the organization. Deviation of these guidelines and or regulations will be the

responsibility of MIS officials, whose decisions are final.


It is in the best interest of the Truck division to utilize one engine package. This will be a STOCK 602 Chevy crate engine. We again will use a tube frame chassis as our chassis of choice. Other Trucks are permitted to run but must call for approval.

ALL 602 Crate Engines must be purchased from GM Performance Parts Preferred Dealer Gandrud

Chevrolet by contacting Chris Slack at 920-371-1051. Engine must be shipped direct to Race Engine Dynamics (REDI) in Madison, WI, 608-276-5554, for uncrating and sealing. Dyno testing  is NOT REQUIRED on these new engines. Also at that time a recommended option is to change oil pans to allow for better ground clearance. The ONLY pan allowed is the 6.5” CP 106 LTRB. This pan can be purchased direct through or delivered to REDI and MUST ONLY be installed by REDI in order for proper re-sealing of the engine. A minor pick up tube modification is required, please contact REDI for more info.

The estimated cost of this process: uncrating, sealing, and oil pan change, with labor is $725 .

Minor repairs only are allowed, and must be done at REDI and must have the approval of the tech

director. At no time may any truck seals be removed by any team or owner.


Body measurements will be taken with frame on 4” blocks. Minimum  height on all body panels is 4” except for nose.

All bodies will be fiberglass or aluminum. All bodies must be from official approved supplier. All bodies

must be approved Midwest Super Truck styles and meet templates.

NO carbon fiber, Kevlar or light weight body panels are allowed. Must meet Five Star Bodies template

rules and heights. These bodies must fit the official templates for the Truck Tour. Minor body changes or

styles will result in a 25 to 50 pound weight penalty.. At tracks over 3/4 of a mile they may not be able to

run. No additions maybe added to the body or any of it components.

Approved bodies are:

1997 though Current Chevolet

1997 though Current Ford

1997 though Current Dodge

1997 though Current Toyota   

Beds must be covered with sheet metal, aluminum or fiberglass and must have a minimum  24” x 18” opening for inspection and filling of fuel.  No through body fillers allowed.

Fenders and quarter panels must be as supplied from body manufacture and must be cut to allow proper

wheel openings. Must be official approved. We will work towards a common body rule. You may change

noses to Five Star noses with other fenders, hoods and 1/4 panels. Must be official approved and neat



79 ½ “ max.  width

5” min. height

No other bars in front of nose

Nose must remain stock for type of truck. Five Star Bodies Preferred.


56” min. height at 10” back from top center of windshield.

Roof must meet templates.


Must be 0.125” lexan, and have three braces

Rear Window

Must be installed and must be lexan.

Side windows

None Allowed. Must have 16” min. window opening. Max 10” vent window allowed.


Must meet body manufacturer templates, Stock appearing body panels only.

Must seal to the wind shield

No hood scopes allowed

No holes in hood except for hood pins

20”x3” maximum opening at base of windshield for air intake.

Rub Rail

1” max. painted body color with capped and smooth ends, tight to body panels and securely mounted to frame. Must be neat appearing. Clear rub rails not allowed.


Must be steel and must be behind nose and tail panel.

Must have tow hooks on front and rear.

Tail gates

Must be complete as shipped from manufacturer and have NO HOLES. Most tail gates will also include

rear bumper cover and must remain as shipped.

Rear Spoiler

5” x 65” maximum, and is mandatory

No lips or wicker bills on spoilers

Must remain straight, no curved spoilers



Interior sheet metal from the top drive shaft tunnel must remain flat or rise on a plane to passenger

window opening with a maximum 4” window ledge.

No ‘boxed in’ or ‘tunneled’ driver compartments.

No plastic or composite material may be used inside the driver’s compartment.

The driver’s compartment must be fully enclosed around the driver.

Must have driveshaft protection plate of 1/8” steel wrapping around left side of the drive shaft area,

from floor to bottom of interior.

Frames and Suspension

Two types of frames will be allowed. One is a tube type chassis and the other is a stock frame chassis. THE TUBULAR FAB STYLE CHASSIS IS THE CHASSIS OF CHOICE AND RECOMMENDED.

Following are the minimum specification requirements for roll cage construction. MIS officials reserve the right to sonic test any or all structural chassis members at any time. Structural chassis member(s) found in violation of minimum requirements render that chassis ineligible for competition until minimum standards are met or exceeded. Drilling holes to lighten any part of the body, chassis, suspension or bolts is not permitted.

Only steel round; rectangular or square tube is approved for roll cage or chassis construction of any main

or supporting sub-structures. Wall thickness, size, and/or diameters are specified where necessary.

Frames may be Stock or Fabricated or any combination of both.

Main frame rails must be steel, minimum of 2”x3” rectangular tubing, with a minimum wall thickness of 0.125”. Main frame rails must have an “X” brace between them on the fab style frame.

Front and rear stubs must be mounted on chassis centerline.

Wheel base will be 108” minimum and 112” Maximum.

Tread width 66” maximum with referee at center of spindle, measured with frame height set no lower than 3” on left front and 3 1/2” on right front.

Call for instructions on STOCK CHASSIS frames.

Roll Cage

4 post roll cage required.

Main hoop and both A pillar bars must attach to the Main Frame Rails.

4 curved door bars are required on the driver’s side, equally spaced from the Main Frame Rail up to the

Driver’s Shoulder. Two vertical braces between each bar and to the Main Frame Rail are also required.

An 18”x24”x1/8” thick steel plate must be welded to the outside of the Driver’s Door Bars.

Passenger Side Door Bars: currently “X” bracing is legal but 4 curved bars may be required in the future

in order to conform to national rules. Main Hoop, both A pillar bars, Shoulder Bar, Dash Bar, Drivers

Door Bars, Passenger Door Bars, Roof Hoop, and Rear Down Tubes must be minimum 1 ¾” diameter

1018 mild steel tubing with a minimum wall thickness of 0.095”. 2 Rear Down Tubes must attach to the top of the Main Hoop and to the Rear Stub behind the axle. Front Engine Hoop must attach to the Main Cage near the intersection of the Dash Bar and A pillar bars, and to the Front Stub forward of the axle. Top of cage to bottom of frame minimum 47 ½”, and top of cage must be within 6” of roof panel. Foot bars are required 1 ½” X 0.95” wall. Side halo bars must be centered in frame rails. Roof hoop shall be minimum 39” wide and 32” long.


Conventionally mounted 5” spring suspension or coil over suspension allowed.

Shocks Maximum price $225

Shocks can be removed and/or disassembled for inspection at any time.

Only One (1) shock per wheel. The only part that can be changed is the shims for compression and

rebound. Shock components must match for that make and model.

Shocks must be conventionally mounted

Rear suspension must be solid mounts no rubber bushings. No lift bar, 5th coil, stabilizer bars or no rubber loaded suspension parts.


Spindles can be one, two, or three piece design. All spindle uprights must be steel.

OEM style or aftermarket calipers, 4 piston max., maximum retail price of $200 per caliper.

No Aluminum Upper or Lower Control Arms, (aluminum shaft is OK).

NO Bump Stops, rebound stops, or spring preloading devices on any part of suspension       


NO BUILT ENGINES allowed in tube chassis. Mid Am style chassis may run Mid Am style engine but must use a 4412 carb. ANY 604 (REBUILT or STOCK) will also run a 4412 2 bbl carb. A ZZ-4

Engine may be used but will also run a 4412 2 bbl carb. STOCK Chevy 602 engine is the engine of choice (see General above), with no modifications allowed. Will be sealed with Truck Tour Seals.

Call for details on Modifications for the 604 crate engine only. 604 Engines maybe run under the SEAL

Engine specs. with a 2bbl carb.

Crate motors will be inspected for correct parts. Be prepared to remove seal bolts if necessary.  REDI will have a complete list of seals and engine ID numbers and will be on file with Tech Inspector.

Crate motors may be impounded for dyno testing. Dyno and inspection costs are the responsibility of the team owner. If power ratings are found out of manufacturer’s specifications and tolerances you will be disqualified and your motor will be confiscated. Maximum horse

power is -=== on REDI’s dyno.

Engine Location

Engines must be located so that the furthest forward spark plug hole is no more than 2 1/2” behind the front axle centerline. Crankshaft centerline must be 11” minimum to ground, front and back.


Teams must run the Crane Cams part# 6000-6700, HI-6RC, and the correct matching coil Crane Cams

part# 730-0192, PS92N. Mounting on right side of dash required. RPM limit must be set at 6000 RPM.

Carburetor 602 Engines

Must use Holley 650 CFM HP P/N 80541

Carburetor size may be adjusted at any time to improve competition.

All Carburetors must pass all dimension tool specs.

Standard boosters only and must be tightly mounted.

Safety wiring of boosters recommended.

No vacuum leaks. No modifications allowed.

1” max. carburetor spacer plate allowed, (1 ¼ “ including gaskets).

Must use single or multi-bore, straight bore spacer, no tapered spacers.

No turtles or other induction performance enhancing devices.

Two (2) returns spring mandatory.

An over-center throttle stop is recommended.

All other engine combinations will use a 4412 2 bbl. carb.


Headers allowed on all engines maximum retail value $400.  Headers may not be coated and must remain as shipped from supplier.

No custom or homemade headers allowed.

No stainless steel.

Exhaust must exit behind driver either under truck or through the right side door. Exhaust end must be braced flush to door panel in a way to prevent it becoming a tire cutting hazard.

No Tri-Y or Merge Collector type exhaust allowed.

Mufflers are mandatory. Maximum of 2 mufflers allowed.

All Trucks must meet track noise requirements of 95 db, NO EXCEPTIONS.

Electrical System

Kill switch must be clearly labeled, within driver’s reach and easily accessible from either side.

Maximum 12-volt electrical system with one battery only.

Battery must be securely mounted outside the driver’s compartment .

All trucks must be capable of starting under their own power.


Any type of transmission may be used. Must be self starting and must have a reverse gear. No drop out

or lightened transmissions may be used. 7 ¼ minimum clutch only on all engine combinations. No carbon

fiber clutches allowed. All clutch components must be made of magnetic steel including flywheel. Must use a bell housing and must have an opening to check clutch and components. Must use a minimum  O.D. 2 ½” steel driveshaft. Driveshaft must have 2 safety hoops, one front and one rear. Clutchless transmissions may be used with a 50 pound weight penalty.


2700 lbs. for all 602 Fab Stub Chassis Combinations

2775 lbs. for  all other combinations with 4412 2bbl

58% maximum left side weight for all combinations


Rear Ends

Rear ends must be passenger, light truck (1/2 ton or less) or quick change. Quick change must

have minimum  ring gear diameter of 10”. Iron or steel carriers and housings on passenger and

light truck rear ends.

No aluminum or lightweight axle tubes. No titanium or other exotic metal allowed in rear end. All

shafts and gears must be magnetic steel.

Rear ends must be locked (recommend spool lock).

No traction control devices or traction compensating differentials.

Full floater rear end is mandatory. All floater parts must be steel with the exception of the drive flange.

No gun drilled axles.

No cambered rear tubes, snouts etc. as to cause rear camber. Max Camber is plus or minus 1 degree.


Radiator must be of stock configuration and as close to stock location as possible.

All trucks must have minimum 18-gauge fan protection covering upper 180 degrees of fan.

Minimum 2 quart overflow container required.

No radiator or fan shrouds protruding through hood.

No cooling system components inside of driver’s compartment.

Electric fans allowed.

NO ANTI-FREEZE!!! Fine may result at official’s discretion.

Fuel and Fuel Cell

No oxygen bearing fuel or performance enhancing additives may be used.

Violations will result in immediate disqualification from the event; forfeiture of owner and driver points, and monies/contingencies earned for the event.

A series fuel will be determined and it’s purchase at the track will be mandatory at all events.

Fuel cells with rubber bladders and  fuel cell plates or fuel cell tubs are mandatory. Fuel cell protector plate is1/8” min. thickness steel, and must be mounted on outside of frame rails. The plates must cover the sides and rear of the fuel cell and be official approved.

Fuel cell minimum height is10”.

Fuel cell must be banded both ways with two steel straps each way, 1” minimum straps.

Fuel cell tub must use minimum of 1/8” thick steel with one-inch lip. Front, bottom and rear will be one piece.

The top of the box will use current 18 or 20 gauge top with 1” by 1/8” steel straps with two in each direction.

All fuel cell cans must be magnetic steel. All fuel cells must have check balls in place.

Any over the axle style rear tail style chassis must use approved 1/8” magnetic steel fuel cell can.

Any chassis with incorrect fuel cell can will be asked to change or be disqualified.

Air Cleaner



Maximum air cleaner height of 4” and be open on all 360 degrees.

Air cleaner element may not be altered, sprayed or soaked with chemicals or any foreign substance

Wheels and Tires

10” maximum width steel wheel.

All wheels must be full racing design.

3” minimum backspacing (ie: 3”, 4” or 5” backspace is OK, 2” backspace not allowed)

No single center, flat back wheels.

No wheel bleeders or bead locks allowed. Solid steel lug nuts required.

5/8” solid steel studs must be installed with correct press fit. No welding of studs. Stud length must be at

least flush with outside edge of lug nut.

Wheel mounting surface must be a minimum 7” diameter, full face, steel hub or use a minimum 7”

diameter x 3/16” formed steel or 7”x 1/4” flat steel, full faced support plate or spacer.

No multiple spacers or plates. No spacer thickness more than 1/4”. Minimum diameter for any spacer is 7”. Spacers must be magnetic steel.

Tire Rule. >>>>>>>>>>>><<<<<<<<<<<<<<<<<

2014 Tire Rule Breakdown

First MIS points event: 4 new race tires, go into your MIS tire bank

Second MIS points event: 4 new race tires, also get recorded into your MIS tire bank, but do not need to run them that night.

ALL OTHER MIS points events: a maximum of 1 new race tire can be added to your MIS tire bank.

All tires in your MIS tire bank must be purchased from MIS.

There is no limit to practice tires.

You can “save or bank” your new tire purchases for racing at a future MIS points night, but beginning with the third MIS points event, no car will be allowed more than 2 new tires.

All tires used for qualifying, heats and features must be in your MIS tire bank.

A tire card must be turned into the tech building prior to qualifying, which declares the four tires that you will run in all events that night.

The tire bank follows the driver.

Teams arriving after MIS points week 3 must start their initial MIS tire bank consisting of 2 official approved used tires, and a maximum of 5 new tires. Remember, when you choose your 4 tires for that night it can only include 2 new tires.

Chemical treatment of tires (softening) is not permitted.


In all matters pertaining to safety, Truck Owners, Drivers and Crewmembers must review and educate

themselves in all safety standards. It is the responsibility of the Truck Owners, Drivers and Crewmembers

to install, wear and maintain all safety equipment as specified by manufacturer’s instructions. This

includes, but is not limited to, helmets, fires suits, racing suits, gloves, shoes, flame-resistant underwear,

flame-resistant head sock, head and neck restraint systems, driver’s racing seat and safety belts. Any

Safety infraction will deem the Truck ineligible for competition until the infraction has been repaired or

corrected and the Truck re-inspected. Drivers wearing dental plates or dentures are required to remove

them for any hot-track activity

Driver’s Seat

All driver seats must be multilayer aluminum, and  manufactured by a recognized manufacturer of seat and safety equipment. Seats must remain “as purchased and produced”, no holes or other modifications made for weight reduction. Homemade seats or sprint Truck type seats are not permitted.

Seat construction must be solid aluminum sheet material from the seat bottom to above the driver

shoulder area; must be fully padded, with padded pelvis, rib and shoulder supports on both the left and

right side. Exception – LaJoie seat where construction is such that rib supports are not required. A head

restraint system, manufactured by a recognized manufacturer of seat and safety equipment, is mandatory

and subject to officials approval. Bolt on systems are approved for competition.

Seats must be equipped with left and right leg extensions, fully padded, running from the edge of the seat

to the entrance of the foot box area.

Recommendation – a minimum 1/8” (.125-inch) thick steel plate be mounted on the front of backside of

the rear hoop of the mid-section in front of the left rear wheel. Plate should extend from the horizontal

shoulder bar downward the height and width of the driver seat.

Drivers Apparel, Seat Belts and H&N

All seat belt and shoulder harness systems must me SFI Specification 16.1, type 1. Y-type shoulder belts

are not approved for use. Seat belts and shoulder harness systems must have a production date within

three years of the event date. A minimum  five-point harness system is mandatory.

Competitors using the (recommended H&N Devices) HANS Device may use a standard three-inch (3”) or

the Schroth Racing two inch (2”) wide should strap. The Schroth Racing shoulder strap system has been

specifically designed for use with the HANS Device. Schroth part numbers are Profi III-6FH; Hyb


Mandatory, and must be located 150” towards rear from front edge of nosepiece.


The chart shown below will be applied for violations of weight, percentages and track width. Once a penalty has been applied, a subsequent violation will be counted as 2nd offense, etc., regardless of category. Also, on championship night, manipulation of this system to improve your position in the point standings will not be allowed.


                                                                                                          POINTS            FINE

 WEIGHT                   1 TO 5     lbs. Lite               1st Offense          Warning             0

                                                                            2nd Offense          10 Points            0

                                                                             3rd Offense          20 Points         $50


                                   6 TO 25    lbs. Lite            1st Offense          10 Points          $25

                                                                            2nd Offense          20 Points         $50

                                                                            3rd Offense           40 Points         $75


                                   OVER 25    lbs. Lite        1st Offense                 DQ               DQ



                                                                                                          POINTS            FINE

 LEFT %                      0.1 TO 0.2 % High          1st Offense            Warning             0

                                                                           2nd Offense           10 Points            0

                                                                           3rd Offense            20 Points          $50


                                   0.3 TO 0.5% High             1st Offense          10 Points           $25

                                                                            2nd Offense          20 Points          $50

                                                                            3rd Offense           40 Points          $75


                                   OVER 0.6% High             1st Offense         20 Points           $75

                                                                           2nd Offense            DQ                  DQ




                                                                                                           POINTS            FINE

 TRACK                    1/16” TO 1/8” Wide             1st Offense           Warning             0

                                                                            2nd Offense          10 Points            0

                                                                            3rd Offense           20 Points          $50


                                 3/16” TO 1/2″ Wide              1st Offense         10 Points           $25

                                                                             2nd Offense         20 Points          $50

                                                                             3rd Offense          40 Points          $75


                                   OVER 1/2″ Wide                1st Offense         20 Points          $75

                                                                             2nd Offense           DQ                  DQ