Pro Modified, also known as Pro Mod, is a class or division in the sport of drag racing which began in the IHRA sanctioning body. Drag racing is a form of auto racing in which any two vehicles (most often two cars or motorcycles) attempt to complete a fairly short, straight and level course in the shortest amount of time, starting from a dead stop. ... The International Hot Rod Association also known as IHRA is the 2nd largest drag racing organization after the NHRA External link http://www. ...

Overview

This division has specific rules about engines, components, bodies, etc. Pro Modifieds can either be raced on 1/4 mile or 1/8 mile tracks. Pro Modified has only been around for about 15 years, whereas other classes are much older. Despite this, it has become one of the most popular divisions of the sport. The Pro Modified division was a spin-off of the IHRA's Top Sportsman division but with fewer limitations, allowing for significantly higher performance. An engine is something that produces some effect from a given input. ... It has been suggested that Quarter mile be merged into this article or section. ...

Engines

The rules of engines in Pro Modified are simple and straight forward. The engine can either have up to 527 cubic inches and be supercharged and methanol fueled, or it can have a larger 740 cubic inch engine that utilizes nitrous oxide and gasoline. Turbocharged engines are not allowed. These engines put out an extremely large amount of horsepower, some at approximately 2500 H.P. The engines propel the cars down the track at speeds of over 200 mph. There are weight limits, according to the type of engine used, 2375 lb. for nitrous powered cars, and 2700 lb. for supercharged (or blown) cars. Most supercharged engines are based on Chrysler's 426 Hemi engine. For other meanings, see supercharger (disambiguation) A supercharger (sometimes called a blower), a positive displacement or centrifugal pump, is a gas compressor used to pump air into the cylinders of an internal combustion engine. ... Methanol, also known as methyl alcohol, wood alcohol or wood spirits, is a chemical compound with chemical formula CH3OH. It is the simplest alcohol, and is a light, volatile, colourless, flammable, poisonous liquid with a distinctive odor that is somewhat milder and sweeter than ethanol (ethyl alcohol). ... R-phrases S-phrases Supplementary data page Structure and properties n, εr, etc. ... Gasoline, also called petrol, is a petroleum-derived liquid mixture consisting mostly of hydrocarbons and enhanced with benzene or iso-octane to increase octane ratings, used as fuel in internal combustion engines. ... Turbocharger Cut-away A turbocharger is a device used in internal-combustion engines to increase the power output of the engine by increasing the mass of oxygen and fuel entering the engine. ... The Chrysler Corporation was an American automobile manufacturer that existed independently from 1925–1998. ... Early Hemi in a 1957 Chrysler 300C See also: Chrysler Hemi engine Hemi (from hemisphere) is a design of internal-combustion engines in which the cylinder heads combustion chamber is of hemispherical form. ...

See also

Pro Stock Pro Stock Drag Racing is a class of drag racing featuring Factory Hot-Rods. The class can be known as all motor, as there are very strict rules governing the modifications allowed to the engines, and the types of bodies used. ...