Most of us know their are limits to injectors and how much they flow, but what if you used different octane?
How much more could you gain with proper tune-ability going from 89 octane to 104 using same size injectors?
Lets say you have 28# injectors, what or how much does octane change it's supporting factors?
I was thinking about doing a build using all junkyard parts, and I already have a shelf of 28# that I might use depending the feedback.
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I also have another different thread asking about something different but sort of the same concept... Two separate cars though. :p
See it here:
http://www.tgpforums.com/index.php/topic,5487.new.html#new
I don't know the answer for you, but I was also wondering how my car would react to 104 octane, we got 1 pump in Utica that carries it and I was wanting to try it out with my 302s...
I had put a few gallons of 104 in my old 91 after my rebuild years ago, and leme say did it wake it up, and made the exhaust smell damn nice too. I assume the TGP could handle it fine, but I was a little weary of putting it in.
I run big ole injectors and 110 in the other Gen2 motor in the other "car" . I kind of have to though. Only downside is, each year I have to change o2 sensors. So pretty much $100.00 every spring is a gaurantee prior to running. DO'H!
This motor, I don't want to buy injectors unless I REALLY have too, and running 104 is not that hard to get and slightly cheaper than 110 by about a 1.50/gallon.
No special precautions have been taken in to account for the 110 LL octane, engine been running off it for 3 years minimum.
Without any specs on the car id say as long as your not already getting detonation, and again i dont know how much boost you are trying to run or any specs on your car but a good tune and 93 goes a long way if you are really good at tuning. The higher octane i suppose could let you run more timing or serve as a saftey for track use or hotter conditions. I wish i could help you out but i am by no means claiming to be a pro tuner :laugh:
I know that tuning and 93 or just plain tuning goes a long way, I just want to know the limitation to #28 while using 104 octane. Like does anyone know their max power limits (regarding them in a 3.1) ?
Quote from: TGed on August 05, 2009, 04:43:02 PM
Most of us know their are limits to injectors and how much they flow, but what if you used different octane?
How much more could you gain with proper tune-ability going from 89 octane to 104 using same size injectors?
The higher octane fuel will help/eliminate detonation but it does not allow your injectors to flow more fuel. With the higher octane you can increase timing and that will increase HP #s.
The 28lb injectors will hold around 325 WHP. If you add in the higher octane fuel and increase timing, HP #s will increase as well... :icon_twisted:
Quote from: flybynite on August 07, 2009, 09:52:38 AM
The higher octane fuel will help/eliminate detonation but it does not allow your injectors to flow more fuel. With the higher octane you can increase timing and that will increase HP #s.
The 28lb injectors will hold around 325 WHP. If you add in the higher octane fuel and increase timing, HP #s will increase as well... :icon_twisted:
Awesome info, thanks!
Quote from: meltboy11 on August 06, 2009, 12:59:02 PM
I don't know the answer for you, but I was also wondering how my car would react to 104 octane, we got 1 pump in Utica that carries it and I was wanting to try it out with my 302s...
If it's not needed, it's not going to help you any and probably hurt performance somewhat. With a stock or topgun chip, 93 is plenty.
For what it's worth, dbtk2 posted about running 87 octane in his car with no knock a few years ago.
wasn't dbtk2 living somewhere highish altitude though? Not that you couldn't get away with it, especially with the right tune, but it does make a difference...
Quote from: GutlessSupreme on August 07, 2009, 05:51:11 PM
wasn't dbtk2 living somewhere highish altitude though? Not that you couldn't get away with it, especially with the right tune, but it does make a difference...
He is a MI person.
Here in Colorado I can run 14 psi all day long because of the altitude. But my times at the track are always slower also.
I'm going to try running 28#, 110 octane, AND alcohol injection (big maybe on this one) . The injection kit all determines how hard it's going to be to put a junkyard kit together and for how much effort/$. I should have a positive turn out on this, being that I do have resources to score some decent parts and a low cost deal.
Going to see how far this junkyard gen2 will go on junkyard parts. I shall call it, THE Savaged Beast.
Sounds good, let us know how you put your Alky kit together with the junkyard parts. :icon_cool: I've had many ideas but never found the time to make anything.