strokrbanshee1 Posted March 25, 2005 Report Share Posted March 25, 2005 I have 21 cc domes will 91 octane hurt my motor??? Quote Link to comment Share on other sites More sharing options...
dlnoss Posted March 25, 2005 Report Share Posted March 25, 2005 You should be fine unless your timing is advanced quite a bit. Quote Link to comment Share on other sites More sharing options...
strokrbanshee1 Posted March 25, 2005 Author Report Share Posted March 25, 2005 I have one of your heads on a passion built 4 mill bike would I feel any difference with race fuel?? Quote Link to comment Share on other sites More sharing options...
mud91 Posted April 18, 2005 Report Share Posted April 18, 2005 just got shee, when talking about race gas, what octane are we talking about. Quote Link to comment Share on other sites More sharing options...
dlnoss Posted April 18, 2005 Report Share Posted April 18, 2005 I have one of your heads on a passion built 4 mill bike would I feel any difference with race fuel?? It depends on your compression. Did Jim recommend pump gas? just got shee, when talking about race gas, what octane are we talking about. Usually 101 to 116 Quote Link to comment Share on other sites More sharing options...
NYCBanshee7 Posted April 18, 2005 Report Share Posted April 18, 2005 I'm at sea level. I would like to know the same thing about 21cc domes. Is it ok to run 93 octane? Quote Link to comment Share on other sites More sharing options...
dlnoss Posted April 18, 2005 Report Share Posted April 18, 2005 I'm at sea level. I would like to know the same thing about 21cc domes. Is it ok to run 93 octane? With the mods listed in your sig you should be fine Quote Link to comment Share on other sites More sharing options...
Bansheeman1121 Posted April 19, 2005 Report Share Posted April 19, 2005 Might as well, im runnin 20cc no advance timing at 1400 feet is 93/94 ok?? Quote Link to comment Share on other sites More sharing options...
NitroTate Posted April 19, 2005 Report Share Posted April 19, 2005 Ok, so I guess I'll jump in here too. I normally ride at 8500' in the mountains of Colorado. I have 17cc domes and +4 deg. Sometimes run 93 oct. pump and sometimes 111 oct. race gas. Am I ok? Quote Link to comment Share on other sites More sharing options...
dlnoss Posted April 19, 2005 Report Share Posted April 19, 2005 Might as well, im runnin 20cc no advance timing at 1400 feet is 93/94 ok?? You should be fine anywhere above 800'-1000' Ok, so I guess I'll jump in here too. I normally ride at 8500' in the mountains of Colorado. I have 17cc domes and +4 deg. Sometimes run 93 oct. pump and sometimes 111 oct. race gas. Am I ok? I would think 93 would be good at 8500'. Have you ever checked your compression at that elevation? Quote Link to comment Share on other sites More sharing options...
NitroTate Posted April 19, 2005 Report Share Posted April 19, 2005 You should be fine anywhere above 800'-1000'I would think 93 would be good at 8500'. Have you ever checked your compression at that elevation? 357204[/snapback] I haven't checked it at that elevation, I live in Denver and have checked it here (5280 ft) it's at 135psi. Quote Link to comment Share on other sites More sharing options...
dlnoss Posted April 19, 2005 Report Share Posted April 19, 2005 You are fine then. Quote Link to comment Share on other sites More sharing options...
Oilsmoke Posted April 19, 2005 Report Share Posted April 19, 2005 You are fine then. 357514[/snapback] Make me wonder if you are at 135 at 5280 what you'll be at 8250 I run about 170 at 5000 feet and runs great with 103 I never tried striaght 91. am running 4.5 degrees adv timing also. Quote Link to comment Share on other sites More sharing options...
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