LSX Shootout

LSX drag radial shootout rules
General Overview
This single POWER ADDER Shootout is a class developed for all LS-powered GM cars and trucks
All races are on a .400 Pro Tree, and in a heads up format
This will be an ALL RUN qualifying format
Vehicles are required to be stock appearing and stock bodied
All vehicles MUST pass NHRA/IHRA safety inspection for ET and speed
A Sportsman ladder will determine running order
Vehicles must be driven to staging and to scales (can be towed after scales)
Vehicles are required to run GM Performance Parts Sponsor decal and GM Performance Parts LSX Shootout license plate

Engine
LS-based small-block engines only
GM manufactured aluminum or iron block required
Displacement will be verified by using the P&G method
Exhaust must be directed away from vehicle, outlet must be rearward of front tire
Exhaust cannot pass through any body panel
Zoomies prohibited
Gasoline is the only fuel allowed
Cylinder heads limited to OEM or OEM-style aftermarket head
Billet cylinder heads prohibited
Racer must be capable verify legal part number head during inspection to be deemed legal
Any modifications allowed to legal heads
Dry-sump oiling systems permitted

Ballast
Must be NHRA/IHRA approved mounting, maximum 100 pounds per individual weight bar
No loose or unsecured ballast allowed (will be grounds for disqualification)

Carburetors/Induction
Any non-split carburetor permitted, 2-carb maximum
Any EFI permitted
Any intake manifold allowed, including sheetmetal/fabricated manifolds

Transmission
Any automatic or OEM-style manual transmissions permitted (*see weights)
Any torque converter allowed (lockup-type permitted)
Torque converters not permitted with manual transmissions
Clutch-activated automatic transmissions prohibited (re: Clutch Flite)
Suspension
Aftermarket K-members permitted
Fully-tubbed or mini-tubbed wheelwells and notched framerails permitted
Factory rear framerails required in OEM location
Wheelie bars permitted
Stock-type suspensions, ladder bars, and non-OEM four-links permitted
Coilovers permitted
Front-wheel-drive conversions prohibited

Interior
Must appear original
Floors must be upholstered, headliners required
Passenger seat and rear seat must be removed
OEM-appearing dash required

Body
Forward-facing hoodscoops prohibited (except OEM-type for non-nitrous applications)
Forward-facing hoodscoops permitted for nitrous applications
Cowl induction hoods permitted, 6-inch maximum
OEM composite body panels permitted
Lightweight or fiberglass body pieces limited to hood, rear deck, and bumpers
Overhangs must be OEM, wheelbase must be OEM +/- 1 inch
Doors must be OEM material
Rear spoilers permitted, maximum length 26 inches (may not be molded into the body)
Tinted windows not permitted forward of the B-pillar, per NHRA requirements

Electrical
Electronic driving aids prohibited
Throttle stops, delay boxes, and auto shifters prohibited
Two-step, transbrakes, and line-locks permitted
Functional headlights, taillights, and horn required
Any aftermarket ignition permitted

Tires/Wheels
Tires-Front: Front tires must have a minimum tread width of 4.5 inches
Tires-Rear: DOT Drag Radial Tires Only
The maximum allowed tire size is 325, as marked on the sidewall
ANY size wheel permitted
Bead locks permitted

Weights

Single centrifugal supercharger:
Any single centrifugal racing supercharger is permitted that fits the following criteria:
Inlet diameter external OD: 6-inch maximum
Impeller inducer diameter: 5.5-inch maximum
Impeller exducer diameter: 8.0-inch maximum
Discharge diameter: external diameter 4.00-inch maximum
Housing diameter (greatest external diameter of housing not to include discharge): 12.0-inch maximum
Injection of liquid, gas, or any other substance into the inlet or exhaust housing is strictly prohibited
Supercharger compressor wheel must be constructed of cast or billet aluminum
Exotic material wheels prohibited

Single turbocharger:
Accepted single turbochargers are permitted with the following requirements:
Turbocharger must be of conventional impeller, housing design, and type
Turbocharger limited to a maximum size of 4.173 inches (106.0 mm) inducer wheel diameter, at the point where the leading edge of the compressor wheel meets the inlet housing
Inlet housing permitted a maximum inlet diameter of 4.253 inches, where the leading edge of the compressor wheel meets the housing
Compressor wheel-to-housing clearance must maintain a maximum of 0.080-inch clearance (beginning from where the leading edge of the compressor wheel meets the inlet of the compressor housing, to the transition point where the trailing edge of the compressor wheel meets the volute)
All air entering the turbocharger must pass through the turbocharger inlet
Injection of liquid, gas, or any other substance into the inlet or exhaust housing strictly prohibited
Turbocharger compressor wheel must be constructed of cast- or billet-aluminum
Exotic material wheels prohibited
The tips of the impeller wheel may not be stepped, cut down, or notched to meet impeller tip-to-tip dimension (.500 inch will define the tip of the impeller wheel)

Twin Turbochargers
Accepted twin turbochargers are permitted with the following requirements:
Both turbochargers must be of conventional impeller, housing design, and type
Turbochargers limited to a maximum size of 2.992 inches (76 mm) inducer wheel diameter, at the point where the leading edge of the compressor wheel meets the inlet housing
Inlet housing permitted a maximum inlet diameter of 3.072 inches, where the leading edge of the compressor wheel meets the housing
Compressor wheel-to-housing clearance must maintain a maximum of 0.080-inch clearance (beginning from where the leading edge of the compressor wheel meets the inlet of the compressor housing, to the transition point where the trailing edge of the compressor wheel meets the volute)
All air entering the turbocharger must pass through the turbocharger inlet
Injection of liquid, gas, or any other substance into the inlet or exhaust housing strictly prohibited
Turbocharger compressor wheel must be constructed of cast- or billet-aluminum
Exotic material wheels prohibited
The tips of impeller wheel may not be stepped, cut down, or notched to meet impeller tip-to-tip dimension (.500 inch will define the tip of the impeller wheel)

LSX showdown index:
A-9.00
B-9.50
C-10.00
D-10.50
E-11.00
F-11.50
G-12.00
H-12.50
I-13.00
J-13.50
K-14.00
L-14.50
M-15.00