lms1977 Posted July 15, 2011 Report Posted July 15, 2011 I put in 19 cc domes and changed my porting ex is 188 now. kicking is 165psi 54 stroke 66 bore soulod be about 14.2 cr what do you think I need for octane? I was running +7 deg timing before and was going to leave it there and try it. can I run avgas straight or mix with pump or just get the race fuel and mix it? I feel I'm slightly over the limit for pump but don't want to just waste money on fuel. Quote
badassbanshee479 Posted July 15, 2011 Report Posted July 15, 2011 i would run at least 50/50 race fuel pump fuel..... never been a fan of the av gas... Quote
bansheesandrider Posted July 15, 2011 Report Posted July 15, 2011 (edited) i would run at least 50/50 race fuel pump fuel..... never been a fan of the av gas... X2 on this. Avgas is meant for engines that are relatively low RPM, not a high revving 2 stroke. You can try mixing it 50/50, on my setup, I can run 40% race and 60% 93 octane pump, try that and see if it knocks. If it does go to 50/50. Edited July 15, 2011 by bansheesandrider Quote
coryv4 Posted July 15, 2011 Report Posted July 15, 2011 I put in 19 cc domes and changed my porting ex is 188 now. kicking is 165psi 54 stroke 66 bore soulod be about 14.2 cr what do you think I need for octane? I was running +7 deg timing before and was going to leave it there and try it. can I run avgas straight or mix with pump or just get the race fuel and mix it? I feel I'm slightly over the limit for pump but don't want to just waste money on fuel. if i under stand right you have a 14.2:1 compression ratio if thats the case i would run 110 Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.