Pro FWD is a class in

drag racing Drag racing is a type of motor racing in which automobiles or motorcycles compete, usually two at a time, to be first to cross a set finish line. The race follows a short, straight course from a standing start over a measured distance, mos ...

. The E.T. Bracket categories are no-electronics classes.

Delay device Delay or DeLay may refer to: People * B. H. DeLay (1891–1923), American aviator and movie stunt pilot * Dorothy DeLay (1917–2002), American violin instructor * Florence Delay (born 1941), French academician and actor * Jan Delay, stage name ...

s, 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 The National Hot Rod Association (NHRA) is a governing body which sets rules in drag racing and hosts events all over the United States and Canada. With over 40,000 drivers in its rosters, the NHRA claims to be the largest motorsport sanction ...

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 An overhead camshaft (OHC) engine is a piston engine in which the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combusti ...

, 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 The Rover K-series engine is a series of internal combustion engines built by Powertrain Ltd, a sister company of MG Rover. The engine was a straight-four cylinder built in two forms, SOHC and DOHC, ranging from . Design history The K seri ...

into Austin Mini or

Austin 1100 Year 1100 ( MC) was a leap year starting on Sunday in the Julian calendar. It last year of the 11th century and the first year of the 12th century. In the proleptic Gregorian calendar, it was a non-leap century year starting on Monday (like 1 ...

Citroën Saxo The Citroën Saxo is a supermini produced by the French manufacturer Citroën from 1996 to 2003. It was sold in Japan as the Citroën Chanson, because Honda had registered the "Saxo" name. The Saxo was a development of the Citroën AX and Peu ...

engine into

Citroën 2CV The Citroën 2CV (, , lit. "two horses", meaning "two Tax horsepower#France, ''taxable'' horsepower") is an economy car produced by the French company Citroën from 1948 to 1990. Introduced at the 1948 Paris Paris Auto Show, Salon de l'Automobi ...

). Redundant power adders, such as a dual stage nitrous system or twin turbos, will be counted as one power adder. All

engine block In an internal combustion engine, the engine block is the structure that contains the cylinders and other components. The engine block in an early automotive engine consisted of just the cylinder block, to which a separate crankcase was attach ...

and

cylinder head In a piston engine, the cylinder head sits above the cylinders, forming the roof of the combustion chamber. In sidevalve engines the head is a simple plate of metal containing the spark plugs and possibly heat dissipation fins. In more modern ...

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.

Exhaust

Open exhaust permitted, except where prohibited by track rules.

Fuel

Only methanol, NHRA-accepted ethanol, or NHRA-accepted racing gasoline permitted. All other fuels prohibited.

Nitrous Oxide

Commercially available

nitrous oxide Nitrous oxide (dinitrogen oxide or dinitrogen monoxide), commonly known as laughing gas, nitrous, or factitious air, among others, is a chemical compound, an Nitrogen oxide, oxide of nitrogen with the Chemical formula, formula . At room te ...

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

turbocharger In an internal combustion engine, a turbocharger (also known as a turbo or a turbosupercharger) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake air, forcing more air into th ...

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 An intercooler is a heat exchanger used to cool a gas after compression. Often found in turbocharged engines, intercoolers are also used in air compressors, air conditioners, refrigeration and gas turbines. Internal combustion engines Mo ...

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

online {{Class of Auto racing Drag racing classes All pages needing cleanup