Home-Made Race gas? Options

[mark95turbo]

I was looking around on DSMtuners.com and found a few articles on making home-made 116 octane race gas. It seems that if you mix 1 part toluene(industrial cleaner) to 9 parts 91 octane gasoline it will yield a 116 octane mix. I was wondering if anybody had tried this? I was thinking about testing it out for the 30th.


Heres one of the articles. There are a few more, but this one seems to be the best.
http://www.dsmtuners.com/forums/showthread.php?t=96893

[natedogg]

Your suspicions are correct, ICGerms. I run 100 octane in my Talon. This allows me to run much higher boost levels than I would be able to run on regular pump gas. I am currently running 26 psi on my BR500 with no knock whatsoever and 25 to 27 degrees of timing advance.

Higher octane fuels actually burn slower than lower octane. This allows higher compression (such as that dynamically provided by turbos or superchargers) because the fuel will burn slower and not detonate or pre-ignite before normal combustion even in very hot, high compression situations. In other words, it waits for the spark rather than ignite on a hot spot (such as a valve edge, casting imperfection, or ring landing) in the combustion chamber. There are other situations that cause pre-ignition and/or detonation as well such as overly hot intake air charges due to an ineffecient turbo or insufficient intercooling, but higher octane helps defeat all of these.