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, most c ...

. 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 The National Hot Rod Association (NHRA) is a drag racing 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 motorsp ...

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 where 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 combustion cha ...

, 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 ser ...

into

Austin Mini The Mini is a small, two-door, four-seat car, developed as ADO15, and produced by the British Motor Corporation (BMC) and its successors, from 1959 through 2000. Minus a brief hiatus, original Minis were built for four decades and sold during ...

Austin 1100 Year 1100 (Roman numerals, MC) was a leap year starting on Sunday (link will display the full calendar) of the Julian calendar, the 1100th year of the Common Era (CE) and ''Anno Domini'' (AD) designations, the 100th year of the 2nd millennium, ...

Citroën Saxo The Citroën Saxo was a supermini produced by the French manufacturer Citroën from 1996 to 2004. It was sold in Japan as the Citroën Chanson, because Honda had registered the "Saxo" name. As a badge engineered variant of the Peugeot 106 (whic ...

engine into

Citroën 2CV The Citroën 2CV (french: link=no, deux chevaux(-vapeur), , lit. "two steam horse(power)s", meaning "two ''taxable'' horsepower") is an air-cooled front-engine, front-wheel-drive, economy family car, introduced at the 1948 Paris Mondial d ...

). 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 which contains the cylinders and other components. In an early automotive engine, the engine block consisted of just the cylinder block, to which a separate crankcase was atta ...

and

cylinder head In an internal combustion engine, the cylinder head (often abbreviated to simply "head") sits above the cylinders and forms the roof of the combustion chamber. In sidevalve engines, the head is a simple sheet of metal; whereas in more modern ov ...

castings must be, or have been, available in a production car or truck from a recognized

OEM An original equipment manufacturer (OEM) is generally perceived as a company that produces non-aftermarket parts and equipment that may be marketed by another manufacturer. It is a common industry term recognized and used by many professional or ...

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 nos, is a chemical compound, an oxide of nitrogen with the formula . At room temperature, it is a colourless non-flammable gas, and has a ...

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 (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to pro ...

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