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FJR Motorcycle Forums
FJR Specific Discussion
85 Octane in The FJR
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<blockquote data-quote="RadioHowie" data-source="post: 1002540" data-attributes="member: 426"><p>Gary, just a guess here, but I'm speculating alcohol is used at the dragstrip since those cars are running MAJOR compression with superchargers...probably around 20:1 compression ratios, and that alcohol works MUCH better than gas at preventing pre-ignition due to the high compression ratios. It's all in preventing supercharger launching off the top of motors.</p><p></p><p>Plus, since they suck down about 13 gallons of fuel in a 1/4 mile run, I don't think the BTU-per-gallon efficiency is an issue.</p></blockquote><p></p>
[QUOTE="RadioHowie, post: 1002540, member: 426"] Gary, just a guess here, but I'm speculating alcohol is used at the dragstrip since those cars are running MAJOR compression with superchargers...probably around 20:1 compression ratios, and that alcohol works MUCH better than gas at preventing pre-ignition due to the high compression ratios. It's all in preventing supercharger launching off the top of motors. Plus, since they suck down about 13 gallons of fuel in a 1/4 mile run, I don't think the BTU-per-gallon efficiency is an issue. [/QUOTE]
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FJR Motorcycle Forums
FJR Specific Discussion
85 Octane in The FJR
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