High Octane Fuel?

[houghkyle]

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. 

[houghkyle]

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. 

['87 shee]

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

[coryv4]

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

[mopar1rules]

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.

[jbooker82]

But is it possible to get a 7.5:1 ratio and 175 psi on a banshee motor?

[mopar1rules]

 

But is it possible to get a 7.5:1 ratio and 175 psi on a banshee motor?

Anything is possible lol