- Top Alcohol
dragsters are akin to 'junior' versions of the premier Top Fueldragster class. They are required to burn a lower-performance mixture of alcohol fuel(generally methanol) instead of more volatile nitromethane. Enginesizes cannot exceed 8.7 L (531 in3). Nitromethane-burning entries may also race in this category,this being the injected cars. superchargered cars are also allowed, the roots and the screw type superchargers are accepted. Ethanol is also occasionally used as a substitute for methanol as it is less corrosive and toxic. Top Alcohol was devised in the 1970s as a replacement for the Top Gas class which was similar but burnt Gasolineinstead of alcohol fuel. Initially dragsters would compete against Funny cars in a category known as Pro Comp before a separate class of Top Alcohol Funny Cars was created in the 1980s. It was within the IHRA's version of this class that the use of ethanol fuel was pioneered with great success by Mark Thomas, an Ohio farmer who became a five-time champion within that organization [http://www.ethanolperforms.com/index.html] . Despite this fact ethanol has failed to capture the imagination of racers, the majority of whom opt for methanol instead. Today both the Top Alcohol Dragster class and the Top Alcohol Funny Car class compete in NHRAdrag racing, however they are not seen as "professional" but are classed as "sportsman". The Top Alcohol classes also compete outside of North American, most notablely in Australia and Europe. Alcohol Funny Car is a professional class in the IHRA.
*E85 ethanol fuel in racing
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