question for everyone
#21
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well yes I know I can run higher timming with 93 now, but the question is will it run better with 89 or 93 as the tune stands.
remember this is the same tune I ran the 12.51 with, nothing has changed except for the octane rating.
I'm running a 226 226 585 585 112 cam in the truck.
remember this is the same tune I ran the 12.51 with, nothing has changed except for the octane rating.
I'm running a 226 226 585 585 112 cam in the truck.
#22
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Apparently there is no gain from runing a higher octane from what you have said..... Given there are alot of variables....... If you want to run faster I would say bump up the timing a little bit and she what happens. I was just trying to apply what I learned in college, in theroy since your not experiencing any knock (I.E. at 89 then adding more timing @93 should yeild higher HP, given everything else is constant..... i
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Originally Posted by bluecajun5.3
well damn, when i get back home i'll have to try some 89 and 87 and do some logs since i run 93 all the time with 28* i think i could get away with it.
#26
Originally Posted by v8
well not every truck will act the same. So be very carefull on the gas you run. Do plenty of logging to check everything, my checks have been from morning to late evening temps from 73 degrees to 93 degrees.
#27
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With the same exact tune I am going to go ahead and say that the 89 octane will perofrm better if the conditions are right. As bluecajun stated, more octane burns slower. If you are having to detonation or knock with the 89 you are having a cleaner and faster burn than the 93octane. These are just my thoughts on the subject, I could be completely off.
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Originally Posted by BlackGMC
Are you running more compression than stock or do you have a radical cam?
224 on a 112..
cant run 89 with that cam
#30
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welp only could muster a 12.81@104.27 with the 89 octane gas. going back to 93 in the morning. Just to be safe with the tune.
Last edited by v8; 07-09-2006 at 09:01 PM.