Safe boost increase w/ race gas?
Since this thread is still going, I did turn it up to 24lbs and the air/fuel was very close to the same, maybe leaner by a couple of tenths. And it felt good as hell.
It is totally up to you. Obviously with higher octane you can run higher boost and a leaner a/f ratio. Personally, i run 114 leaded race gas all the time. It gets expensive but it is cheaper than having to buy parts for a full build since i am a boost junkie, haha. Good luck.
Originally Posted by WHTEVO
It is totally up to you. Obviously with higher octane you can run higher boost and a leaner a/f ratio. Personally, i run 114 leaded race gas all the time. It gets expensive but it is cheaper than having to buy parts for a full build since i am a boost junkie, haha. Good luck.
Originally Posted by Warrtalon
WHTEVO, haven't you had to buy parts to fix things anyway! =P
Originally Posted by Jeff_Jeske
About what % of fuel did you take out for 114 octane?
Originally Posted by Warrtalon
Gotcha. Assumed you would do the same thing for any of your cars (re: 114oct) based off your comments about being a boost junkie.
I run it around a 12.5 a/f ratio +- a little when on race gas. It will all depend on your mods on how much changing it will affect your a/f ratio to be "safe". I would not go off of my settings unless your car was setup exactly like mine. Make sense?
this may seem like a total n00b question, but last time i raced, i dumped in a half tank of 110 leaded w/ about 1/4 tank of 91, drove to the track, cranked the MBC about 6 full turns, and raced. Someone asked me if i had "reset" the ecu i.e. unplugged the neg. terminal on the battery. I hadn't, but didn't think that it really mattered. Does it make a difference?
Originally Posted by Warrtalon
You will be 100% fine at 24psi even on a 50/50 mix of 93/110. There's no secret to determining octane. It's just basic math. If you have half 93 and half 110, then your octane is the average of the two, which is 101.5 (basically). On that octane, you can run 24-25psi all day. You would be better off with unleaded race gas, if it's available, since you can't retune, but although you may run a little richer, you will overcome that by pushing an extra 2-3psi without fear of knock.
What do you mean what happens when you get knock? Do you mean how do you know if you're knocking, or are you actually asking what the side effects of knock are? I was kinda hoping you would know that or could find it from searching, but if your engine is knocking, the ECU will pull timing, which lessens power. Also, knock damages the engine...
What do you mean what happens when you get knock? Do you mean how do you know if you're knocking, or are you actually asking what the side effects of knock are? I was kinda hoping you would know that or could find it from searching, but if your engine is knocking, the ECU will pull timing, which lessens power. Also, knock damages the engine...
You dont need to reset the ECU to run more boost. Don't worry about it.
As for the % question. When I run 100 octane I pull 4% fuel to get to 12.0:1 AFR. I was wondering how much fuel you pull when you run 114 or C16.
As for the % question. When I run 100 octane I pull 4% fuel to get to 12.0:1 AFR. I was wondering how much fuel you pull when you run 114 or C16.
Originally Posted by WHTEVO
I run it around a 12.5 a/f ratio +- a little when on race gas. It will all depend on your mods on how much changing it will affect your a/f ratio to be "safe". I would not go off of my settings unless your car was setup exactly like mine. Make sense?