How about these as a starting point. They are a modified version on the TSS rules and do address the issue of the TA vs. TE turbo size. Thoughts and/or input?
Factory Stock Appearing – FSA
General
Heads-up 4-tenths pro tree start and pro ladder. (1 vs 16, 2 vs 15, 3 vs 14, 4 vs 13, 5 vs 12, etc....)
All cars racing in the Turbo Heads-Up racing classes must be owned and driven by a current member of the GSCA.
No peer technical inspections relating to safety equipment rules by class participants or peers, Beech Bend Raceway track safety technician personnel will make all rulings on track safety related items.
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 TSS class.
To compete in this class the car must be Factory Stock Appearing with the following exceptions and/or clarifications:
Definition of "Factory Stock Appearing"
A factory stock appearing part is a GM part originally delivered on a 1986 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. See Engine section for cylinder block requirements. * Note: GM exhaust headers may be welded on externally to repair defects. This includes the driver's side header area that is prone to cracking and may include welding on both driver and passenger side header between the primary port and mounting flange. Welded in EGT gauge probe bungs are allowed. See Engine and Engine Management section for cylinder block and ignition requirements.
Chassis
Seat belts, lights, horn, and windshield wipers must be operational.
All factory headlights must be in place during competition.
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 3,500 pounds.
Complete stock, painted TR/GN body required.
No fiberglass or carbon fiber body parts, bumpers or hood scoops.
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.
Factory stock appearing front suspension components and mounting locations required w/any type stock location shocks. Swaybars may be removed.
Factory stock rear suspension locations required with any type stock location shocks.
**All control arms must use the factory mounting location. No bolt-in or welded relocators allowed. (ie. Southside bars).**
No quarter panel modifications except rolled inner fender lip.
Minor modifications to stock rear wheel wells (no mini-tubs).
Outer frame rail notching is allowed. Inner frame rails remain stock. No inner frame rail reinforcement allowed.
No ladder bars or coil over equipped rear suspension.
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. Sponsor/vendor decal is acceptable on the rear window.
A maximum of 2 hood mounted gauges are allowed.
Engine
Buick V6 block < 240CID max.
**Block casting number 25526109 only. No Stage or A/M blocks!!**
Must use DIS type I or II ignition, NO distributor.
8-bolt Iron cylinder head castings required. No Stage 2 or aluminum heads.
Factory valve covers and oil pan required.
No dry sump-oiling system.
Factory stock intake manifold required. No external welding allowed * No modifications such as welding, cold weld epoxy, putty, etc. may be done on any portion of the intake manifold runners to increase manifold air flow are allowed.
Factory stock appearing cast aluminum intake plenum allowed.
Factory stock appearing throttle body required. * Throttle body may be bored to 62-mm so long as it retains the factory stock appearance.
Factory stock appearing driver's side exhaust headers. No ATR, Hooker, Terry Houston or Poston replacements allowed.
Factory crossover pipe required. No delta gates allowed.
Any single or dual exhaust system allowed. Must muffle and exit in stock location(s) (3.0" max size). * Exhaust must run through mufflers in competition.
Factory downpipe elbow and downpipe from the turbo is required. It must be routed down through the stock location. No flex pipe allowed.
Turbo
**One (1) factory stock appearing TA series, Garrett 3-bolt turbo required. Maximum 60.00-mm compressor wheel, Inlet bore maximum 60.50-mm measured. No ported shroud compressor housing. The TA series turbo compressor inlet housing must be a 3" inlet with a 2" outlet only.
No ball bearing turbos of any type.
Intercooler
Factory stock location air to air intercooler required, no modifications allowed.
No front mount intercoolers are allowed.
No liquid intercoolers, intercooler external spray cooling, or add-on cold boxes allowed.
Engine Management & Fuel System
Stock ECM or modified stock ECM only. NO aftermarket fuel system systems allowed, (DFI, FAST, Motec, etc). NO speed density sysytems.
Factory Stock Appearing (Type I) or (Type II) DIS cam position sensor required.
No individual coil per spark plug ignitions allowed.
No distributor ignitions allowed.
No delay boxes, throttle stops, or crossover boxes allowed.
Any intake air induction system allowed.
Factory MAF sensor is required. All intake air must pass through and be measured by the MAF sensor.
Any fuel pump(s) allowed. * Note: Fuel pump(s) must not be visible from outside of car.
Voltage increasing and fuel pump hot wiring devices are allowed.
All factory stock appearing fuel lines required.
Factory stock appearing fuel rail required.
Any type fuel pressure regulator allowed.
Up to 60-lb fuel injectors allowed, 6 maximum.
Factory stock appearing fuel tank required with no additional cells or sumps.
Gasoline fuel only, no additives, alcohol, or nitrous oxide injection allowed.
Engine Compartment
Air conditioning operational w/belt in stock location.
Power steering operational w/belt in stock location.
Stock alternator operational w/belt in stock location.
Stock water pump operational w/belt in stock location.
No engine compartment dress up is allowed with the exception of chromed or polished factory parts.
Battery, one (1) only and it must be the stock location.
Stock type electric engine cooling fan required.
Any stock or replacement radiator in stock location allowed.
Transmission
GM 200-4R transmission required.
Any size torque converter acceptable, with or without lock-up.
Any transmission oil cooler and pan allowed.
No transmission brake allowed.
Differential
Factory stock appearing differential housing required.
No differential spools.
Any gear ratio w/factory stock or reinforced differential cover allowed.
Tires & Wheels
Drag radials up to 275/60-15 are allowed. Tires may not be shaved.
Front tire footprint must be at least 5.0" wide.
Interior
Full stock interior required.
Stock transmission shifter required.
No external aftermarket gauges allowed. Internal gauges such as boost, oil pressure and water temp are allowed. Knock sensor and scan masters are allowed.
Jim C. - GSCA Race Director
