05-29-2004, 01:51 PM
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CC Member
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Join Date: Jan 2002
Location: Northern California,
CA
Cobra Make, Engine: -Sold- Contemporary 427S/C # CCX-3152 1966 427 Med Rise Side Oiler, 8v 3.54:1 Salisbury IRS, Koni's.. (Now I'm riding Harleys)
Posts: 2,567
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Tolulene is 114 octane Xylene is 117. Both are sold commercially for various reasons the most common is paint thinner.
Do the math though. 6 ounces of either makes little diference in a tank of fuel. Both are highly flamable, though not much more than gasoline. You should know both have a corrosive effect on rubber seals and gaskets and should be limited to less than 30% by volume to reduce the chance of hose and or fuel pump failure.
If you take 10% tolulene (say 1 gallon in a 10 gallon fuel load) and 9 gallons of 91 octane (the highest octane available in Calif) you get an overall octane of 93.3... 20% is 95.6 and 30% is 97.9.
6 ounces of anything which is 114 octane or 117 octane will only net you a few thenths, these are reffered to as "points" on the back of the cotane boost bottles. a bottle of octane boost may net you an increase of .4-.7 or 4 to 7 points, 91.4-91.7. Most commercial octane boosters are Tolulene or Xylene.
You might not make a good deal more power, but you will get everything you can out of the power available to you by way of timing, etc. The other thing is many (most) engines running 11:1 or more will tend to diesel on shutdown or ping or shutter under load without at least 93 octane.
Most Home Depot stores have both. They sell for 5-10 dollars a gollon depending on the size you buy. Either way it's better than $5-10 for a little bottle of octane booster.
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michael
A man that is young in years, may be old in hours, if he have lost no time. But that happeneth rarely. Generally, youth is like the first cogitations, not so wise as the second. For there is a youth in thoughts, as well as in ages... Sir Francis Bacon (1561-1626)
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