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Compression and octane question #554854 12/15/09 10:08 PM 12/15/09 10:08 PM
Joined: May 2009 Posts: 836 Missouri G galen OP super stock
galen OP super stock G Joined: May 2009 Posts: 836 Missouri	Thinking of upping my compression from 10.23 to the range of 11.5 with my 440-1 heads. 91 octane is highest unleaded around here. A drum of C12 figures out at 11$ a gallon. Can I blend C12 and unleaded and run 11.5 comp. E85 is also not available close. Galen

Re: Compression and octane question [Re: galen] #554855 12/15/09 10:16 PM 12/15/09 10:16 PM
Joined: Mar 2009 Posts: 1,169 Virginia Beach, VA O Old School super stock
Old School super stock O Joined: Mar 2009 Posts: 1,169 Virginia Beach, VA	i mix 1/4 premium 3/4 110 race gas.i use this mix in my 500" motors with 13.2-13.5.never a problem. 68 cuda formula S 588" bb 5sp 70 CUDA CONVERT 500" 5SP (SUBLIME) 70 CUDA CONVERT 500" 5SP (PLUMCRAZY):TOO MUCH HORSEPOWER, IS ALMOST ENOUGH!

Re: Compression and octane question [Re: galen] #554856 12/15/09 10:30 PM 12/15/09 10:30 PM
Joined: Sep 2006 Posts: 3,749 Chowchilla,ca Chassisman master
Chassisman master Joined: Sep 2006 Posts: 3,749 Chowchilla,ca	Use this mix formula for a good idea of what ratio to make a certain octane... http://www.wallaceracing.com/octane-mix-calc.php

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