What AFR's do you run?
A forged bottom end can withstand 12.0/1, but we tend to shoot for 11.5/1. If it was on my own car, then I might lean it out a little, but I don't want to do that on a customer's engine, #7 always seems to run a little leaner anyway. Bob
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11.0:1 for me and anything I tune thats turbo or supercharged, especially on stock motors. Want more power, add more octane and turn up the boost, much safer than leaning it out. Leanes I will run a car is 11.5:1.
Another reason I tune 11.0:1 on 91 octane is when you start adding leaded gas with a lower specific gravity it will lean out. I know I go from 11.0:1 to about 11.3-4:1 using 100LL which I run quite often.
Another reason I tune 11.0:1 on 91 octane is when you start adding leaded gas with a lower specific gravity it will lean out. I know I go from 11.0:1 to about 11.3-4:1 using 100LL which I run quite often.
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On The Tree
Joined: Aug 2005
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thanks guys-I get a little black smoke as it is at 12.5 the car was probably a little richer but I went to a slightly smaller pulley before I put in the guage.This is still the mail order tune from lingen wich I've run for 3 years.So now I can use a higher concentration of methanol to water knowing that I am on the lean side of things.I had no idea FI cars liked to run so rich.Now for my next question--I added a 100 wet shot powerring setup.I'm going to look for KR on the scanner,watch fuel preassure,and the AFR's I will try to keep???About 11:1??BTW,I have Ross forged pistons otherwise stock bottom end.
Last edited by speedz06; Oct 22, 2005 at 03:12 PM. Reason: adding info