RULES: TRP Rule Change / ADD 100lbs must be added for car
over 88mm and the MAX of 94mm Turbos.
FORMAT: This is a 1/8 mile heads-up class run on a .400 pro
tree with a pro ladder. Courtesy staging and auto-start is
in effect. THIS IS A SINGLE POWER ADDER CLASS ONLY!
SAFETY: All NHRA/IHRA and Local Track Safety rules apply for
driver and car, including the use of an oil retention device
or engine diaper.
BALLAST: Any material used for the purpose of adding to a
car's total weight must be permanently attached to the car's
structure and must not extend in front of or behind the rear
of the car's body. No liquid or loose ballast permitted
(i.e., water, sandbags, rock, shot bags, metal weights,
etc.)Removable weight must be securely mounted to the frame
or frame structure by a minimum of two 1/2 inch diameter
steel bolts per 100 pounds, or one 3/8 steel bolt per 5
pounds; all other weight bars, pucks etc.
BODY: The car must retain its original appearance, profiles,
and dimensions. Factory roof and quarter panels must be
used. Aftermarket fiberglass and/or carbon fiber replacement
panels are limited to hood, front fenders, doors, deck-lids,
and bumpers only. Carbon fiber T-Top replacement panels
permitted. All front ends must be of factory dimensions and
cannot be lengthened and must meet all NHRA/IHRA height.
(See ground clearance note below). Any beam tripping devices
forward of the bumper are prohibited. (Track tech official
will have final say) Aftermarket wings and spoilers are
permitted. Complete stock appearing front and rear bumpers
are required. A hood must be used: scoop or hood must cover
the entire induction system. Forward facing hood scoops/
turbo or supercharger inlets are permitted.
ELECTRONICS: Mag type ignition prohibited.
GROUND CLEARANCE: Minimum 3 inches from front of car to 12
inches behind centerline of front axle, 2 inches for
remainder of car, except the oil pan, oil retention device,
INTERIOR: Fiberglass / carbon dash permitted. The
transmission tunnel maybe removable. Aftermarket steering
column is permitted. WINDSHIELD/WINDOWS: OEM glass or Lexan
windows are permitted.
CHASSIS: Front frame rails must be retained. Tube chassis
cars not permitted. Tubing forward of the strut tower or
forward of the a-arm mounting point permitted. Back-halved
cars are permitted. Front core support may be modified or
removed. Aftermarket bolt-on replacement front K-members/sub
frames are allowed. Shock tower must be in factory location.
Factory wheelbase must be maintained. (+ or 1 inch)
ENGINE: Billet SB/BB blocks permitted/non-stock bore space
SB entries permitted with 100 lb. weight penalty. Add 50
lbs. for Hemi or 481X entry over non-conventional head
combo. BB block boosted limited to stock bore spacing.
TURBOCHARGERS: Twin turbochargers limited to 88 mm maximum.
(Garrett GTX55-88, Exile ETR-88, or = Forced Induction,
Comp, Bullseye - mid frame or current PTE Gen II Pro Mod 88.
Turbocharger size will be verified by measuring the housing
bore at the leading edge of the impeller wheel and must
maintain the contour of the compressor housing. (Stepped or
Clipped compressor wheel prohibited) Inducer dimensions will
not exceed 3.462 inches/88 mm and Exducer dimensions will
not exceed 5.237 inches/133 mm on Pro Mod turbos. The
maximum diameter of the housing bore at the leading edge of
the wheel may not exceed 2 mm more than the maximum
allowable turbocharger size permitted. Inserts or reducers
to achieve inlet or outlet dimensions prohibited. Any type
of air to air or water to air intercooler permitted.
SUPERCHARGERS: Cog or gear driven superchargers are
permitted, must meet all factory inlet, outlet, and internal
housing dimensions. Inserts or reducers to achieve inlet or
outlet dimensions prohibited. Any type intercooler is
permitted. Roots superchargers permitted. Centrifugal
superchargers are permitted. Screw superchargers are not
NITROUS OXIDE: Small block and Big Blocks are permitted to
run any type of multi-stage nitrous system.
TRANSMISSION: Any factory style automatic transmission
allowed. Electric shifters or air shifters are permitted.
INDUCTION: Small Block and Big Block combinations may run
any type induction.
OILING SYSTEM: Dry sump oiling systems are permitted on all
EXHAUST: Mufflers or inserts are required on all cars except
for turbo cars. Exhaust may exit underneath car or out the
front fenders/valance but must not affect timing or staging
FUEL: Gasoline or M1 only is permitted. M5 prohibited
STREET EQUIPMENT: Functional headlights and tail lights
SUSPENSION: Stock style / ladder bar / 4-link rear
suspension cars permitted. Aftermarket direct replacement
components such as: front control arms, rear control arms,
front coil over shocks, and rear coil over shocks are
permitted. Front suspension with strut conversion permitted
on entries with rear stock type suspension ONLY. Aftermarket
rack and pinion steering allowed. Rear leaf springs,
springs, shocks, and coil-overs may be moved to accommodate
tire clearance, and do not need to be mounted in stock
location. Bolt-on or welded sub-frame connectors, rear sway
bars, are permitted on all cars. Wheelie bars are prohibited
on all cars.
TIRES: MT 275 Pro Radial (-100 lbs.) (Pro Bracket in 28 or
29 x 10 prohibited) MT 325/50 - 315/60 (Pro315 prohibited) -
295/65 or 295/55 DOT Radial tire only
SB NOS 2300
BB NOS 4.84 /4.900- 2600 (max 10.3 deck height)
BB NOS 5.00 - 2800 (includes 10.4 to 11.0 deck height
stock bore space entries)
BB NOS 5.2/5.3 2950
SB SINGLE Turbo/Centrifugal or Roots Blower (14-71 max)-
SB TWIN Turbo - 2950 (Pro Mod 88 max)
BB SINGLE Turbo/Blower - 3050 (118 mm/F3-139/Roots 14-71
max w/conventional head)
BB SINGLE Turbo/Blower - 3150 (118 mm/F3-139/Roots 14-71
max w/non-conventional head)
BB TWIN Turbo/Blower - 3250 (Pro Mod 88/F2 max
BB TWIN Turbo/Blower - 3300 (Pro Mod 88/F2 max
If one combination appears to have an advantage rules may be
changed at the race directors discretion at ANYTIME in
order to keep a level playing field for all competitors.