houghkyle Posted April 24, 2013 Report Share Posted April 24, 2013 I live in Wichita KS and the highest octane fuel we can get is 91. What other options do I have? Is there a additive I can use to bump my octane up? My bike is bored 1 over, race ported, milled head to 21cc, K&N in box, CPI pipes, and +4 timing. Quote Link to comment Share on other sites More sharing options...
houghkyle Posted April 24, 2013 Author Report Share Posted April 24, 2013 No not wanting to run race fuel. I use to run 93 octane but everyone in Wichita stopped selling it. Just thought bumping up a little in octane couldn't hurt. Quote Link to comment Share on other sites More sharing options...
'87 shee Posted April 24, 2013 Report Share Posted April 24, 2013 I have pretty much the same set up. I run half 93 ethanol free nd half 110 nd i live in arkansas. Im prolly pushin a lil more compression than u tho. 174psi...hope it helps. Do a compression test nd go from there...ne thing above 160 psi run at least half nd half...ne thing under id run ethanol free 91 and lucas octane booster Quote Link to comment Share on other sites More sharing options...
coryv4 Posted April 24, 2013 Report Share Posted April 24, 2013 I have pretty much the same set up. I run half 93 ethanol free nd half 110 nd i live in arkansas. Im prolly pushin a lil more compression than u tho. 174psi...hope it helps. Do a compression test nd go from there...ne thing above 160 psi run at least half nd half...ne thing under id run ethanol free 91 and lucas octane booster alot more than just compression determines whether or not you can run pump gas. 7.5:1 compression ratio and 175psi could safely run 93 octane Quote Link to comment Share on other sites More sharing options...
mopar1rules Posted April 26, 2013 Report Share Posted April 26, 2013 alot more than just compression determines whether or not you can run pump gas. 7.5:1 compression ratio and 175psi could safely run 93 octane One of the best replays to a "what octane do I run" question. Timing also plays a role in what octane fuel needed. Its not based off of "cranking psi".......don't know why everyone keeps thinking that. Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted April 27, 2013 Report Share Posted April 27, 2013 But is it possible to get a 7.5:1 ratio and 175 psi on a banshee motor? Quote Link to comment Share on other sites More sharing options...
mopar1rules Posted April 30, 2013 Report Share Posted April 30, 2013 But is it possible to get a 7.5:1 ratio and 175 psi on a banshee motor? Anything is possible lol Quote Link to comment Share on other sites More sharing options...
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