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Ethanol has received both positive and negative attention as a renewable fuel for spark ignition engines. Studies of ethanol have shown improved volumetric efficiency, knock tolerance, and favorable burn curves[1]. Nevertheless, little research has been published exploring the impact of ethanol blends on race engine performance coupled with the impact on well-to-wheels (WTW) greenhouse gases, emissions, and petroleum reduction. In this work, a circle track race vehicle powered by a GM Performance Parts 6.2L OHV CT-525 engine was tested using 100 octane race fuel and E85 over a matrix of configurations. Carburetion vs. fuel injection configurations were benchmarked with both fuels, with the addition of 100- and 300-cells-per-inch catalytic convertors. Testing involved both dynamometer testing and on-track testing utilizing a portable emissions measurement system.

This paper discusses the design and strategy for conversion of a vehicle to dedicated E85 (85% ethanol, 15% indolene clear) operation for participation in the 1998 Ethanol Vehicle Challenge by the University of California, Riverside. The primary focus of the design consists of: Development of a -7°C cold starting system utilizing a distillation process. Development of a close-coupled catalyst and secondary air injection system to decrease FTP cold start emissions. This paper begins with a theoretical description and design of a novel distillation system that can provide gasoline- enriched fuel for starting in cold weather. This is followed by a description of modifications to the engine, emission control system, and other vehicle components. Modifications included engine changes to increase thermal efficiency, to improve handling, and to reduce friction. Suspension modifications were made to improve handling.