dmfisher71 Posted April 6, 2012 Report Share Posted April 6, 2012 ok just wanting peoples opinion on what type/octane fuel to run here is my set up.... hot rods long rod crank, new wiseco 795 series pistons, +4 on timing, milled/shaved head (not rechambered), TDR carbon fiber reeds, FMF gold series fattys, power core 2 silencers...not sure of elevation i know above sea level (southern Indiana)...stock carbs currently with stock pilots (i think), and currently have 340 mains.... i have not ran the motor yet waiting on my cylinders to get bored.... i will also take any suggestions on the timing and jetting that i can get also....thanks guys Quote Link to comment Share on other sites More sharing options...
ClayAiken Posted April 6, 2012 Report Share Posted April 6, 2012 (edited) Fuck Nvm. You could prob get away with 93/91 Edited April 6, 2012 by Hyper Quote Link to comment Share on other sites More sharing options...
LawDog Posted April 6, 2012 Report Share Posted April 6, 2012 93 Quote Link to comment Share on other sites More sharing options...
EvilBanshee Posted April 6, 2012 Report Share Posted April 6, 2012 x3. easily ultra 94 would be fine Quote Link to comment Share on other sites More sharing options...
dmfisher71 Posted April 6, 2012 Author Report Share Posted April 6, 2012 what i was thinking of was mixing 91-93 octane with 110 race fuel at a 50/50 ratio bring it down to around 100 octane range.... plus i REALLY like the smell of race gas..lol Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted April 6, 2012 Report Share Posted April 6, 2012 what i was thinking of was mixing 91-93 octane with 110 race fuel at a 50/50 ratio bring it down to around 100 octane range.... plus i REALLY like the smell of race gas..lol KLOTZ!!! Quote Link to comment Share on other sites More sharing options...
slothman Posted April 7, 2012 Report Share Posted April 7, 2012 what i was thinking of was mixing 91-93 octane with 110 race fuel at a 50/50 ratio bring it down to around 100 octane range.... plus i REALLY like the smell of race gas..lol you can use 93 octane and 10% Xylene, which will bump it up a few points. It's cheaper than race gas. I used to use it in my supercharged mustang. Quote Link to comment Share on other sites More sharing options...
zach45 Posted April 7, 2012 Report Share Posted April 7, 2012 you can use 93 octane and 10% Xylene, which will bump it up a few points. It's cheaper than race gas. I used to use it in my supercharged mustang. Is that like nail polish remover? Quote Link to comment Share on other sites More sharing options...
Starwriter Posted April 7, 2012 Report Share Posted April 7, 2012 Mixing xylene or toluene with gas falls into the hillbilly homebrew catagory. Possible unpredictable results and damage to your motor. Check your compression to determine your octane needs. Then go with straight 93, 50/50 of 93 and race gas, or straight race gas. Quote Link to comment Share on other sites More sharing options...
thomas h. Posted April 7, 2012 Report Share Posted April 7, 2012 You can use 91/93 up to about 145-155 psi and +2timimng. Then ask your builder. Quote Link to comment Share on other sites More sharing options...
dmfisher71 Posted April 8, 2012 Author Report Share Posted April 8, 2012 You can use 91/93 up to about 145-155 psi and +2timimng. Then ask your builder. as of right now i have it set at +4 timing... i will check the compression when i get the top end back on... would be sooner but i ordered the wrong diameter pistons , i am the one building it... Quote Link to comment Share on other sites More sharing options...
bluebanshee98 Posted April 8, 2012 Report Share Posted April 8, 2012 (edited) 93 should be fine. thats what i run in my 4 mil dune port with +4 timing Edited April 8, 2012 by bluebanshee98 Quote Link to comment Share on other sites More sharing options...
thomas h. Posted April 9, 2012 Report Share Posted April 9, 2012 I said +2 because that's what I run. I will turn it up after break in and leak down and plug chop to insure that if I do get detonation that I know every thing else good. If I do get an air leak down the road and I'm running +4 I might be worried that I wouldn't shut it down befor hurting the engine. So take it slow when your the builder. Quote Link to comment Share on other sites More sharing options...
slothman Posted April 9, 2012 Report Share Posted April 9, 2012 Mixing xylene or toluene with gas falls into the hillbilly homebrew catagory. Possible unpredictable results and damage to your motor. Check your compression to determine your octane needs. Then go with straight 93, 50/50 of 93 and race gas, or straight race gas. People have been using Xylene for years and years. It has the same properties as regular conventional gasoline. I have NEVER heard of xylene causing damage to an engine. I have used it myself, without any problems for years. Same goes for many other drag racers. Quote Link to comment Share on other sites More sharing options...
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