Pro FWD
Encyclopedia
Pro FWD is a class in drag racing
. The E.T. Bracket categories are no-electronics classes. Delay devices, throttle stops, air shifters, transbrakes, etc. or any device that transmits real-time, on-track data to the driver or any remote location are prohibited. All applicable NHRA rules apply based on elapsed time.
E.T. Bracket classes use a .5-second, full-countdown Tree.
engine into Citroën 2CV
). Redundant power adders, such as a dual stage nitrous system or twin turbos, will be counted as one power adder. All engine block and cylinder head
castings must be, or have been, available in a production car or truck from a recognized OEM
assembly line with a minimum production run of 5,000 units. Transverse orientation may be converted to longitudinal orientation.
permitted, including for supercharged and turbocharged engines. Nitrous bottle(s) in driver compartment must be equipped with a relief valve and vented outside of driver's compartment. Bottle(s) must be stamped with a DOT-1800-pound rating and permanently mounted (no hose clamps or tie wraps). Hoses from bottle(s) to solenoid must be high-pressure steel-braided or NHRA-accepted hoses.
must pass through the turbocharger inlet. Injection of any liquid, gas, or any other substance into the inlet or exhaust housing is prohibited. Turbocharger compressor wheel must be constructed of cast or billet aluminum. Exotic material wheels prohibited. Liquid intercooler
s limited to water and/or ice ONLY.
Four-cylinder, single-turbo application: limited to maximum 88mm turbo, where the maximum compressor housing inducer diameter is 89.5mm (3.523 inches), measured at the point where the leading edge of the compressor wheel meets the housing. Compressor wheel inducer diameter not to exceed this value, and contours of wheel must not be "stepped, notched, or clipped"; i.e., the contours must be continuous features from the inducer to the wheel exducer. All air entering the turbocharger must pass through the turbocharger inlet. Injection of any liquid, gas, or any other substance into the inlet or exhaust housing is prohibited.
Turbocharger compressor wheel must be constructed of cast or billet aluminum. Exotic material wheels prohibited.
Drag racing
Drag racing is a competition in which specially prepared automobiles or motorcycles compete two at a time to be the first to cross a set finish line, from a standing start, in a straight line, over a measured distance, most commonly a ¼-mile straight track....
. The E.T. Bracket categories are no-electronics classes. Delay devices, throttle stops, air shifters, transbrakes, etc. or any device that transmits real-time, on-track data to the driver or any remote location are prohibited. All applicable NHRA rules apply based on elapsed time.
E.T. Bracket classes use a .5-second, full-countdown Tree.
Engine
Restricted to one, 4-cylinder, overhead cam, production-based automotive engine. Maximum displacement 2.8 liter (170.75 cid). Engine swaps permitted; engine must be from same manufacturer as body (For example, Rover K-series engine into Austin Mini or Austin 1100 or Citroën SaxoCitroën Saxo
The Citroën Saxo is a supermini produced by the French manufacturer Citroën from 1996 to 2003. It was also sold in Japan as the Citroën Chanson. It shares many engine and body parts with the Peugeot 106 , the major difference being interiors and body panels...
engine into Citroën 2CV
Citroën 2CV
The Citroën 2CV |tax horsepower]]”) was an economy car produced by the French automaker Citroën between 1948 and 1990. It was technologically advanced and innovative, but with uncompromisingly utilitarian unconventional looks, and deceptively simple Bauhaus inspired bodywork, that belied the sheer...
). Redundant power adders, such as a dual stage nitrous system or twin turbos, will be counted as one power adder. All engine block and cylinder head
Cylinder head
In an internal combustion engine, the cylinder head sits above the cylinders on top of the cylinder block. It closes in the top of the cylinder, forming the combustion chamber. This joint is sealed by a head gasket...
castings must be, or have been, available in a production car or truck from a recognized OEM
OEM
OEM means the original manufacturer of a component for a product, which may be resold by another company.OEM may also refer to:-Computing:* OEM font, or OEM-US, the original character set of the IBM PC, circa 1981...
assembly line with a minimum production run of 5,000 units. Transverse orientation may be converted to longitudinal orientation.
Fuel
Only methanol, NHRA-accepted ethanol, or NHRA-accepted racing gasoline permitted. All other fuels prohibited.Nitrous Oxide
Commercially available nitrous oxideNitrous oxide
Nitrous oxide, commonly known as laughing gas or sweet air, is a chemical compound with the formula . It is an oxide of nitrogen. At room temperature, it is a colorless non-flammable gas, with a slightly sweet odor and taste. It is used in surgery and dentistry for its anesthetic and analgesic...
permitted, including for supercharged and turbocharged engines. Nitrous bottle(s) in driver compartment must be equipped with a relief valve and vented outside of driver's compartment. Bottle(s) must be stamped with a DOT-1800-pound rating and permanently mounted (no hose clamps or tie wraps). Hoses from bottle(s) to solenoid must be high-pressure steel-braided or NHRA-accepted hoses.
Forced Induction
All Applications: Restricted to a single turbocharger. All air entering the turbochargerTurbocharger
A turbocharger, or turbo , from the Greek "τύρβη" is a centrifugal compressor powered by a turbine that is driven by an engine's exhaust gases. Its benefit lies with the compressor increasing the mass of air entering the engine , thereby resulting in greater performance...
must pass through the turbocharger inlet. Injection of any liquid, gas, or any other substance into the inlet or exhaust housing is prohibited. Turbocharger compressor wheel must be constructed of cast or billet aluminum. Exotic material wheels prohibited. Liquid intercooler
Intercooler
An intercooler , or charge air cooler, is an air-to-air or air-to-liquid heat exchange device used on turbocharged and supercharged internal combustion engines to improve their volumetric efficiency by increasing intake air charge density through nearly isobaric cooling, which removes...
s limited to water and/or ice ONLY.
Four-cylinder, single-turbo application: limited to maximum 88mm turbo, where the maximum compressor housing inducer diameter is 89.5mm (3.523 inches), measured at the point where the leading edge of the compressor wheel meets the housing. Compressor wheel inducer diameter not to exceed this value, and contours of wheel must not be "stepped, notched, or clipped"; i.e., the contours must be continuous features from the inducer to the wheel exducer. All air entering the turbocharger must pass through the turbocharger inlet. Injection of any liquid, gas, or any other substance into the inlet or exhaust housing is prohibited.
Turbocharger compressor wheel must be constructed of cast or billet aluminum. Exotic material wheels prohibited.
External links
- Class Rules from NHRA online