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ChadS
07-11-2004 15:26:37
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Re: HIGH octane fuel deals?? in reply to in need HIGH OCTANE fuel , 07-11-2004 10:40:17
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I am in Indiana, costs about $2.50 a gallon through our supplier. that is mixed. Let me ask,, how much compression does your engine have?? 4 or 6 cyl,, cubic inch irrelitive for figuring out octane amounts. 200psi and under, 94 octane will handle it,, 201-225psi, 100, 250 to 275, 103-108 octane, 275 to 300 and up, 110 to 115 octane. Octane,, you can get too much actually ,and cause preigntion again. It does not give you a clean burn in the cyl,, and all the contaminates left over from not using the excess causes carbon to build up, and it builds, and builds, then it breaks loose, and floats around in the cyl they are hot, and will preignite the cyl. it is like a bunch of sparks left over from the combustion. Ethanol,, it is a very very clean burning fuel, and Buickndeere is right,, you have to rejet it richer, and yes, it does cool off the carb and intake very nicely,, seen it frost up on a 90 degree day during warm up on my H. and that is at 50/50 of my fuel mixture. it is not pure ethanol I use either, it has gasoline already in it,, but it is like a 85-90% ethanol content. then I cut it back with 94 ultra. the mix I use depends on compression, high compression I run it 50/50,, for 200 psi and less, is more like a 75%gas, and 25% ethanol. Funny thing,, and yes We have had our fuel checked,, at the 50/50 mix, just under .750, but ileagal in the nationals,, just because ethanol is considered alcohol. Of course, ethanol is in everyday pump gas, so that throws pump gas 87-94 octane, ethanol blended. so be careful,, if you can run it, run it, you wont be disaponted for a low rpm engine. ChadS
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