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Dirt Bike Brands - Other
Octane made easy: Do-it-yourself race fuel
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[QUOTE="Ojref, post: 578720, member: 39007"] Octane rating is an averaging expression of the overall flame-front expansion rate from ignition considering the stoichlometric ratio and the compression ratio, among other things. Suffice it to say that if you are noticing detonation issues or you have built the engine for higher compression, you can benefit from higher octane fuel. An easy way to obtain a higher octane product fuel if you live in an area that doesn't sell highly rated fuel is to obtain (pure!) Tolulene (paint stores like Sherman Williams sell this in 1, 5, 10 or 55 gal) and mix with a volume of your source fuel using this formula: ((a *b) + (c * 114)) / (b+c)=f Toluene rated (114) A= Source fuel octane rating B=Quantity of source fuel (gallons) C=Quantity of tolulene (gallons) F=Product fuel (gallons) You could put this into a spreadsheet and play with the numbers to see what it would take to produce the amount of octane you desire. For example, If I had a tank of 10 gallons rated 93 octane, to produce 95 octane fuel I would have to mix in 1.1 gallons of Tolulene. Some would comment that Xylene is higher (rated 116) but Xylene is harsh on rubber parts. Please do not do this or you might be out some expensive carburetor parts. Tolulene is a component of modern fuel, and is much better to use than AV gas, which contains lead and other chemicals to change its vaporization constant at different altitudes / pressures, which can again cause problems for you. [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Octane made easy: Do-it-yourself race fuel
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