Buicks4speed
New Member
- Joined
- Apr 23, 2004
Here are the final rules for the Power-Adder class to be run at the 2009 Bowling Green Event. More events to follow pending participation.....
CLASS DESCRIPTION
Xtreme Street is a heads up class designed for stock appearing, rear wheel drive America production vehicles produced 1960-2008. Entries are permitted Buick powered v-6 or v-8, small block or big blocks with superchargers, turbochargers, or nitrous.
All Run, NHRA Sportsman Ladder, Pro .400 tree, Heads-Up.
REQUIREMENTS AND SPECIFICATIONS
BODY
The body must retain its original appearance and profiles. Original OEM body shell type and dimension required. Aftermarket fiberglass replacement panels allowed for hood, hoodscoop, bumpers, and OEM appearing replacements that bolt on.
Aerodynamics - Taping of any parts of body, seams, or front end is prohibited.
Firewall/Fender wells - Firewall must be original and in stock location. Fender wells not required
Hood/Scoop - Cowls and factory type forward facing scoops only. May be liftoff. No visible altercations to outside body for fresh air. Forward facing Hood scoop allowed for n/a. Hood/scoop must cover entire engine and induction components.
Interior - Dash and carpeting are required. Interior wheelwells may be modified for tire clearance. Aftermarket bucket seats are allowed. A full stock dashboard with instruments (aftermarket instruments are allowed) and controls must be retained. The back seat may be deleted.
Lettering/Decals - Car lettering is limited to windows only.
Wheel tubs - In order to clear legal tires, mini-wheel tubs are acceptable.
Windshield/Windows –FRONT Windows must be operative but closed during racing. Front and rear windows may be lexan but must appear OEM. No lexan allowed that requires support or that does not conform to the original contour of OEM without support. No crazed, fogged, or weathered lexan that that creates a safety hazard and does not pass for the clear appearance of OEM glass.
Wings/Spoilers - Factory available front and rear spoiler or wing for specific year/make/model of body used will be allowed. A maximum of a 12” aftermarket rear wing is allowed with a maximum side height of 3.5”.
BRACKET RACING AIDS
Bracket racing aids such as optical sensors, delay boxes, stutter boxes, and throttle stops are not allowed.
CHASSIS/SUSPENSION
Chassis – No back-half chassis. Full factory type frame rails required. Front framerails must remain in the stock location and may not be altered for the purpose of providing tire clearance. Tubular crossmembers are permitted. Rear frame may be notched for tire clearance. Any strengthening members may be added to a stock frame.
Front Suspension - Aftermarket direct-replacement components are allowed as long as stock mounting points are maintained on components and frame. Coilover shocks are permitted in stock spring location.
Rear Suspension - Ladder bar, or modified stock suspension. Mounting points for stock type suspension may have multiple attach points for geometry change but must be in stock location.
COOLING SYSTEM
Radiator - must be mounted in stock location. No restriction on size.
DRIVETRAIN
Automatic Transmission - Any OEM type automatic transmission with torque converter is allowed. Transbrake is allowed. Aftermarket shifter allowed but any gear change must occur as a result of an internal function of the transmission or as direct action of the driver. Pneumatic, hydraulic, electric, etc. shifters prohibited.
Manual Transmission - No planetary Lenco’s, Liberty’s, Jerico type transmission. Gear change must occur by clutch interruption from driver.
Rearend - Any automotive type allowed, any ratio.
ENGINE
Must be Buick. Any make Buick engine in any allowed body style. There is no cubic inch limit. Any internal engine modifications are allowed.
EXHAUST
All exhaust must pass thru the muffler(s).
FUEL
Fuel - Only gasoline is allowed for the primary power source. Boosted applications allowed methanol or water/methanol to be added thru a small secondary system, not part of the primary fuel delivery system. Systems may not contain over one gallon of fluid.
IGNITION
Aftermarket ignitions, magnetos, multiple-step rev limiters, electronic-conversion kits, crank triggers, and external amplifier boxes are allowed.
Intake Manifold – Any commercially available single 4 barrel cast intake manifold except as outlined. Cast intake manifold may be internally modified. Naturally aspirated, Small Blocks, and v-6 engine can run fabricated sheet metal intake or cast. N/A Big Blocks and Small blocks allowed to run 2x4 setup.
Nitrous Oxide - Nitrous oxide is allowed but may not be used in conjunction with supercharger or turbocharger.
Electronics - Progressive systems and timers, which control nitrous/fuel delivery, are permitted. Electronic or automated boost controllers of any type are allowed on any forced induction vehicle.
Supercharger – No limitations for Small blocks and v-6’s. Big Block combinations limited to a max outlet tube diameter of 3.5”. Max I.D of supercharger 3.15”. No steps or sleeves allows to alter the stock I.D. of outlets. Any size roots or screw allowed. Roots or Screw may run 2x4’s carb setups.
Single Turbos- No limitations for Small blocks and v-6. Big Block combination turbo limited to max outlet tube diameter 3.5”. Outlet I.D. 3.15. No steps or sleeves allowed to alter the stock I.D. of outlets.
Twin Turbos- No limitations for small block and v-6 combinations. Big block combinations limited to turbo with outlets limited to 2.05” I.D.. No steps or sleeves allowed to alter stock internal I.D. outlet dimensions.
Turbo Placement - Turbo may be located anywhere inside the engine compartment, facing any
direction. Inlet must not be forward of any body panels or grills. No external body/grill holes added for turbo inlets.
Turbo inlet may remain open to outside air.
Aftercoolers/Intercoolers - Aftercoolers/Intercoolers are permitted. Air-to-air coolers or Air-to-water coolers are the only systems acceptable. Water and ice are the only two acceptable components allowed in reservoir. Air-to-air allowed CO2 bars coolers over intercooler.
ONBOARD DIAGNOSTICS/DATA RECORDERS
Onboard diagnostic computers and data recorders are allowed. Memory and playback tachometers are acceptable. Autometer Dual Channel Ultimate II tachometers are acceptable. Optical and/or rpm pickups after the flywheel only allowed for use of data acquisition.
STEERING - Any stock or aftermarket rack-and-pinion steering is allowed.
TIRES
Rear tires may either be DOT-approved and labeled or labeled for racing slicks. DOT tires must have labels facing the outside of the body and are limited to a 30x13.5 / 325 or 315 series radial. Any slick with the max sidewall designation of 30”x10.5” allowed. The tread of tires must not protrude outside of the exterior of bodyline at top of tires.
Base Weight
3,000 lbs - Naturally Aspirated Big Block.
3,200 lbs – Nitrous Big Blocks.
3,400 lbs – Supercharged v-8.
3,000 lbs – Turbo / Supercharged Small blocks combination.
2,600 lbs – Nitrous small block combinations
3,000 lbs - Turbocharged v-6
Air-to-water intercooler – Add 100lbs
Manual transmission – Add 200lb.
CLASS DESCRIPTION
Xtreme Street is a heads up class designed for stock appearing, rear wheel drive America production vehicles produced 1960-2008. Entries are permitted Buick powered v-6 or v-8, small block or big blocks with superchargers, turbochargers, or nitrous.
All Run, NHRA Sportsman Ladder, Pro .400 tree, Heads-Up.
REQUIREMENTS AND SPECIFICATIONS
BODY
The body must retain its original appearance and profiles. Original OEM body shell type and dimension required. Aftermarket fiberglass replacement panels allowed for hood, hoodscoop, bumpers, and OEM appearing replacements that bolt on.
Aerodynamics - Taping of any parts of body, seams, or front end is prohibited.
Firewall/Fender wells - Firewall must be original and in stock location. Fender wells not required
Hood/Scoop - Cowls and factory type forward facing scoops only. May be liftoff. No visible altercations to outside body for fresh air. Forward facing Hood scoop allowed for n/a. Hood/scoop must cover entire engine and induction components.
Interior - Dash and carpeting are required. Interior wheelwells may be modified for tire clearance. Aftermarket bucket seats are allowed. A full stock dashboard with instruments (aftermarket instruments are allowed) and controls must be retained. The back seat may be deleted.
Lettering/Decals - Car lettering is limited to windows only.
Wheel tubs - In order to clear legal tires, mini-wheel tubs are acceptable.
Windshield/Windows –FRONT Windows must be operative but closed during racing. Front and rear windows may be lexan but must appear OEM. No lexan allowed that requires support or that does not conform to the original contour of OEM without support. No crazed, fogged, or weathered lexan that that creates a safety hazard and does not pass for the clear appearance of OEM glass.
Wings/Spoilers - Factory available front and rear spoiler or wing for specific year/make/model of body used will be allowed. A maximum of a 12” aftermarket rear wing is allowed with a maximum side height of 3.5”.
BRACKET RACING AIDS
Bracket racing aids such as optical sensors, delay boxes, stutter boxes, and throttle stops are not allowed.
CHASSIS/SUSPENSION
Chassis – No back-half chassis. Full factory type frame rails required. Front framerails must remain in the stock location and may not be altered for the purpose of providing tire clearance. Tubular crossmembers are permitted. Rear frame may be notched for tire clearance. Any strengthening members may be added to a stock frame.
Front Suspension - Aftermarket direct-replacement components are allowed as long as stock mounting points are maintained on components and frame. Coilover shocks are permitted in stock spring location.
Rear Suspension - Ladder bar, or modified stock suspension. Mounting points for stock type suspension may have multiple attach points for geometry change but must be in stock location.
COOLING SYSTEM
Radiator - must be mounted in stock location. No restriction on size.
DRIVETRAIN
Automatic Transmission - Any OEM type automatic transmission with torque converter is allowed. Transbrake is allowed. Aftermarket shifter allowed but any gear change must occur as a result of an internal function of the transmission or as direct action of the driver. Pneumatic, hydraulic, electric, etc. shifters prohibited.
Manual Transmission - No planetary Lenco’s, Liberty’s, Jerico type transmission. Gear change must occur by clutch interruption from driver.
Rearend - Any automotive type allowed, any ratio.
ENGINE
Must be Buick. Any make Buick engine in any allowed body style. There is no cubic inch limit. Any internal engine modifications are allowed.
EXHAUST
All exhaust must pass thru the muffler(s).
FUEL
Fuel - Only gasoline is allowed for the primary power source. Boosted applications allowed methanol or water/methanol to be added thru a small secondary system, not part of the primary fuel delivery system. Systems may not contain over one gallon of fluid.
IGNITION
Aftermarket ignitions, magnetos, multiple-step rev limiters, electronic-conversion kits, crank triggers, and external amplifier boxes are allowed.
Intake Manifold – Any commercially available single 4 barrel cast intake manifold except as outlined. Cast intake manifold may be internally modified. Naturally aspirated, Small Blocks, and v-6 engine can run fabricated sheet metal intake or cast. N/A Big Blocks and Small blocks allowed to run 2x4 setup.
Nitrous Oxide - Nitrous oxide is allowed but may not be used in conjunction with supercharger or turbocharger.
Electronics - Progressive systems and timers, which control nitrous/fuel delivery, are permitted. Electronic or automated boost controllers of any type are allowed on any forced induction vehicle.
Supercharger – No limitations for Small blocks and v-6’s. Big Block combinations limited to a max outlet tube diameter of 3.5”. Max I.D of supercharger 3.15”. No steps or sleeves allows to alter the stock I.D. of outlets. Any size roots or screw allowed. Roots or Screw may run 2x4’s carb setups.
Single Turbos- No limitations for Small blocks and v-6. Big Block combination turbo limited to max outlet tube diameter 3.5”. Outlet I.D. 3.15. No steps or sleeves allowed to alter the stock I.D. of outlets.
Twin Turbos- No limitations for small block and v-6 combinations. Big block combinations limited to turbo with outlets limited to 2.05” I.D.. No steps or sleeves allowed to alter stock internal I.D. outlet dimensions.
Turbo Placement - Turbo may be located anywhere inside the engine compartment, facing any
direction. Inlet must not be forward of any body panels or grills. No external body/grill holes added for turbo inlets.
Turbo inlet may remain open to outside air.
Aftercoolers/Intercoolers - Aftercoolers/Intercoolers are permitted. Air-to-air coolers or Air-to-water coolers are the only systems acceptable. Water and ice are the only two acceptable components allowed in reservoir. Air-to-air allowed CO2 bars coolers over intercooler.
ONBOARD DIAGNOSTICS/DATA RECORDERS
Onboard diagnostic computers and data recorders are allowed. Memory and playback tachometers are acceptable. Autometer Dual Channel Ultimate II tachometers are acceptable. Optical and/or rpm pickups after the flywheel only allowed for use of data acquisition.
STEERING - Any stock or aftermarket rack-and-pinion steering is allowed.
TIRES
Rear tires may either be DOT-approved and labeled or labeled for racing slicks. DOT tires must have labels facing the outside of the body and are limited to a 30x13.5 / 325 or 315 series radial. Any slick with the max sidewall designation of 30”x10.5” allowed. The tread of tires must not protrude outside of the exterior of bodyline at top of tires.
Base Weight
3,000 lbs - Naturally Aspirated Big Block.
3,200 lbs – Nitrous Big Blocks.
3,400 lbs – Supercharged v-8.
3,000 lbs – Turbo / Supercharged Small blocks combination.
2,600 lbs – Nitrous small block combinations
3,000 lbs - Turbocharged v-6
Air-to-water intercooler – Add 100lbs
Manual transmission – Add 200lb.
