Timing vrs octane rating.
04-21-2006, 11:34 PM
#1
Timing vrs octane rating. What is the max timing most people are shooting for on a 10.5-1 compression ratio engine running 100% high octane racing fuel (110)? NA engine that is. Seeing any benifits from it?
Please see my sign, I am thinking of making a tune for track only(racing fuel only) and am wondering if anyone thinks it will be worth the trouble.
Thanks for answering my stupid question.
Please see my sign, I am thinking of making a tune for track only(racing fuel only) and am wondering if anyone thinks it will be worth the trouble.
Thanks for answering my stupid question.
04-21-2006, 11:39 PM
#2
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The higher the octane the fuel, the LESS combustible it is.
Don't use race fuel unless you HAVE to, or it will make your car slower, and can gum up injectors, plugs, etc.
Race fuel is a must for very high compression, or lots of boost.
10.5:1 definitely doesn't need it. I'm 11.3:1 and run on 93 fine.
Don't use race fuel unless you HAVE to, or it will make your car slower, and can gum up injectors, plugs, etc.
Race fuel is a must for very high compression, or lots of boost.
10.5:1 definitely doesn't need it. I'm 11.3:1 and run on 93 fine.
04-23-2006, 04:47 PM
#3
True, very true. But for any iron headed engines guys out there that might be reading all this, you might want to knock another compresion point off that. Rule of thumb is aluminum headed engines can run 1 compression point higher on a give fuel then the same engine with iron heads. This is due to aluminum being able to transfer the heat out of the combustion chamber and into the water jacket faster then iron will.
