General

·        Qualifying ET is 11.99 or quicker. <- For the POINT SERIES ONLY!

·        Heads-up, 4-tenths Pro tree start and Pro ladder.

·        Winner and runner-up are subject to re-weigh and re-tech immediately after final round or at any other time.

·         Any entrant caught trying to deliberately break the rules will be disqualified from the TSM class.

 

Definition of "Factory Stock Appearing"

 

A factory stock appearing part is a GM part originally delivered on a 1981 to 1987 Buick Regal, GNX, Grand National, T-Type or Turbo Regal from Buick Motor Division and is externally stock in appearance. No external welding, cold weld epoxy, puttying, etc. may be done on any factory stock appearing part unless specifically stated.

 

Chassis

·        Seat belts, lights, horn, and windshield wipers must be operational.

·        Helmet required. Cars must pass track safety inspection.

·        Car should possess all applicable safety equipment for potential ET/speeds attained.

·        Minimum car weight w/driver must be at least 3,400 pounds with iron heads and 3,550 with alum. heads.

·        Complete stock, painted TR/GN body required.

·        Fiberglass body parts are limited to bumpers and hood.

·        Stock operating glass windows and windshield required no lexan.

·        Engine/firewall must be in stock location.

·        Stock wheelbase required (108.0" measured).

·        Factory stock appearing inner front wheel wells required. Trimming allowed for downpipe clearance.

·        Factory stock appearing front suspension components and mounting locations required w/any type stock location shocks.

·        Factory stock rear suspension locations required w/any type stock location shocks.

·        Any suspension stabilizer/reinforcement bars or traction enhancing devices are allowed.

·        Swaybars may be removed.

·        No ladder bars or coil over equipped rear suspensions.

·        No quarter panel modifications except rolled inner lip.

·        Minor modifications to stock rear wheel wells (no mini-tubs).

·        Outer frame rail notching allowed. Inner frame rails remain stock.

·        No wheelie bars or parachutes.

·        Brake system must be either Power Master or vacuum boost operated, no manual brakes allowed.

·        Brake system line locks allowed.

·        Drive shaft safety loop required.

·        Driver's name and club decal on side/quarter windows allowed. Two (2) Sponsor/vendor decals up to one-half square foot in size are acceptable.

 

Engine

·        Buick V6 production block casting (generally the 25526109 block, although, older non-Stage blocks allowed). <250CID maximum.

·        Any valve covers and oil pan allowed.

·        Buick V6 iron or aluminum cylinder heads.

·        Aluminum cylinder heads allowed with 150 pound added weight penalty.

·        No Stage 2 heads.

·        No dry sump-oiling systems allowed.

·        Factory stock intake manifold required. No external welding allowed except for EGR block-off plate and/or repairs.

·        *No modifications such as welding, cold weld epoxy, puttying, etc. may be done on any portion of the intake manifold runners to increase manifold air flow are allowed.

·        No aftermarket cast aluminum or sheet metal intake manifolds of any kind allowed.

·        Any cast aluminum intake plenum allowed.

·        Any size single modified stock or aftermarket throttle body allowed. Single throttle plate only.

·        Any type stock location exhaust headers are allowed. Welded in EGT gauge probe bungs are allowed.

·        Any single or dual exhaust system allowed. Must muffle and exit in stock location (3.5" max size, including downpipe - measured 4.0" from the flange). Downpipe must be routed down through the stock location, no flex pipe allowed.

 

Turbo

·        Single 3-bolt turbo only.

·        Maximum size compressor wheel is 70mm. Inlet bore should not exceed 71.5mm to allow for machining tolerances on a 70mm compressor wheel.

·        *No sleeves, welding or cold weld epoxy on any exterior surface of the turbo compressor housing to allow a larger than 70mm compressor wheel to be installed is allowed.

·        *Note: One of the following turbine exhaust housings is allowed: A Garrett P/N's 430832-4 and 430832-5, PT&E P/N's THB376, THB380, THB576 and THB580, Turbonetics P/N's 20240-63 and 30340-82 3 bolt turbine housings that were available November 1 of the previous year.  *** The factory stock appearing turbine exhaust to downpipe flange connection must be used.

·        Any air intake to turbo allowed.

·         Any wastegate configuration acceptable, external wastegate(s) must be plumbed back into the exhaust system, no external dumps allowed.

 

Intercooler

·        Any stock location or front mount air to air intercooler is allowed.  *No part of a stock location intercooler (not the shroud) may extend down no more than 11.5” below the centerline of the crankshaft. A front mount intercooler except for the piping may not extend down below the bottom of the stock located radiator support.

·         No liquid intercoolers, intercooler external spray cooling, or add-on cold boxes allowed.

 

Engine Management & Fuel System

·        Stock, modified stock ECM or aftermarket fuel management systems allowed (DFI, Fel-Pro, Motec, etc).

·        MAF optional.

·        Thumbwheel chips allowed.

·        No Delay boxes, Throttle stops or crossover boxes allowed.

·        Any air induction system allowed.

·        Any fuel pump(s) configuration/location allowed.

·        Voltage increasing and fuel pump hot wiring devices are allowed.

·        Any fuel lines allowed.

·        Factory stock appearing fuel rail only.

·        Any type fuel pressure regulator allowed.

·        Any fuel injectors allowed.

·        Factory stock fuel tank w/sump addition is allowed. Fuel cells allowed.

·        Gasoline fuel only, no additives, alcohol, or nitrous oxide injection allowed.

 

Engine Compartment

·        A/C and heating equipment may be removed.

·        Power steering operational w/belt in stock location.

·        Stock alternator operational w/belt in stock location. Relocation brackets allowed as long as alternator is still on driver's side, front of engine.

·        Stock water pump operational w/belt in stock location.

·        All engine accessories must be driven off the same belt.

·        Any engine compartment dress up allowed.

·        Battery may be in any location.

·        Any stock type/location electric engine cooling fan(s) allowed.

·         Any stock or replacement radiator in stock location allowed.

 

Transmission

·        Any GM automatic transmission allowed. (TH200-4R, TH400, etc.)

·        Any size torque converter allowed.

·        Any transmission oil cooler and pan allowed.

·        Transmission brake allowed.

 

Differential

·        Factory stock appearing GM differential housing, a Dana-60 style or the 9" Ford style differential housing required.

·        Limited slip differential or spool allowed.

·        Any gear ratio w/factory stock or reinforced differential cover allowed.

 

Tires & Wheels

·        Any matched set of four (4), 15” diameter chrome steel or aluminum wheels allowed.

·        Rear drag slicks w/sidewall designation up to and including 29.5” x 10.5” - 15”. No "W" tires allowed. Rear DOT street tires w/sidewall designation up to and including a 29.5” x 12.5” - 15” size tires are allowed. Rear tire footprint when installed on a rim and mounted on the car can not exceed a maximum of 10.6" in width at 10 psig checking pressure. Tires may not be shaved at the tread edge to meet the 10.6" maximum tread width rule.

·        Front tire footprint must be at least 3.5" wide.

 

Interior

·        Full stock appearing interior required.

·        Any transmission shifter allowed.

·        Race seats allowed only if seats are attached to rear crossbar of roll bar/cage and seats are painted or upholstered to match factory interior.

·        Any additional aftermarket gauges allowed. A maximum of two (2) external gauges allowed.