TSS Class Rules

[Orlando_87GN]

Turbo Street Stock – TSS (official 10/01/2004)

General

• Qualifying ET is 12.20 or quicker.
• Heads-up 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 TSS 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. 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.

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 3,500 pounds.
• Complete stock, painted TR/GN body required.
• No fiberglass body parts, fiberglass 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. Trimming allowed for downpipe clearance.
• Factory stock appearing front suspension components and mounting locations required w/any type stock location shocks. Swaybars may be removed.
• Factory stock boxed rear upper and lower control arms or aftermarket rear suspension traction enhancing devices allowed. Stock location mount points required.
• 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.

Engine

• Buick V6 block < 240CID max.
• Block casting numbers 25526109 & 25500012 only.
• Iron cylinder head castings required. No Stage 2 or aluminum heads.
• Any valve covers and oil pan allowed.
• No dry sump-oiling system.
• 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.
• Factory stock appearing or aftermarket cast aluminum intake plenum allowed.
• Factory stock appearing throttle body required.
• Factory stock appearing driver's side exhaust header or current aftermarket replacement allowed. Right side exhaust header must be factory stock appearing, no ATR, Hooker, Terry Houston or Poston replacements allowed.
• Any crossover pipe allowed. No delta gates allowed.
• Any single or dual exhaust system allowed. Must muffle and exit in stock location(s) (3.0" max size).
• Any downpipe size is acceptable. 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.
  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 turbine housings that were available November 1 of the previous year. *** The factory stock appearing turbine exhaust to downpipe flange connection must be used.
  
• No welding is allowed on any exterior surface of the turbo compressor housing to allow for a larger compressor wheel.
• Turbo compressor inlet bell of any type required.
• Factory stock appearing wastegate actuator w/adjustable rod and boost control solenoid(s) required.
• Turbo heat shield/cover optional.

Intercooler

• Factory stock location air to air intercooler required, modifications allowed. * No part of a stock location intercooler (not the shroud) may extend down no more than 12.00” below the centerline of the crankshaft. No front mount intercoolers are allowed.
• No liquid intercoolers, intercooler external spray cooling, or add-on cold boxes allowed.
• Flex hose or solid MAF pipe between the MAF and turbo inlet bell allowed.

Engine Management & Fuel System

• Stock ECM or modified stock ECM required with one chip only.
• No thumb wheel chips allowed.
• Any intake air induction system allowed.
• Any MAF sensor is acceptable. All intake air must pass through 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. * A braided steel line from the frame cross member to the fuel rail is acceptable.
• Factory stock appearing fuel rail required.
• Any type fuel pressure regulator allowed.
• Any fuel injectors allowed, 6 maximum.
• Factory stock appearing fuel tank required w/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.
• Any engine compartment dress up allowed.
• Battery, one (1) only and it may be in any location.
• Stock type electric engine cooling fan required.
• Factory stock type copper core radiator in stock location required.

Transmission

• GM 200-4R transmission required.
• Any size torque converter acceptable, with or without lock-up.
• Any transmission oil cooler and pan allowed.
• 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

• Any matched set of four (4), 15" diameter chrome steel or aluminum wheels allowed.
• Rear drag slicks w/sidewall designation up to 28.0" x 10.5" x 15". No "W" tires allowed.
• Tire footprint when installed on a rim and mounted on the car can not exceed 10.3" at 10 psig checking pressure.
• Tires may not be shaved at the tread edge to meet the 10.3" maximum tread width rule.
• Front tire footprint must be at least 3.5" wide.

Interior

• Full stock interior required.
• Stock transmission shifter required.
• Any additional aftermarket gauges allowed.
• A maximum of 2 hood mounted gauges are allowed.