a/f ratio for boost

philgeb12 · 02-19-2007, 08:43 AM

what's a good target a/f ratio for boost with 8.8:1 comp and 15 lbs of boost? is 11.8 ok? I'm also using meth. injection

Slowhawk · 02-19-2007, 11:09 AM

Quote:

Originally Posted by philgeb12

what's a good target a/f ratio for boost with 8.8:1 comp and 15 lbs of boost? is 11.8 ok? I'm also using meth. injection

That will be fine but I would get it to 11-1 while you set the timing then lean it out.

philgeb12 · 02-19-2007, 11:25 AM

ok thanks

Tuner@Straightline · 02-23-2007, 12:04 PM

I usually shoot for 12.0:1 with boost and then 11.5:1 on Meth. I've had a few cars running 10-12lbs that really l liked 12.2:1, and some that really liked 11.8:1. With good heads and bottom end, you should be fine between there. To find out the best AFR for your set up, you're going to have to play around a little. I've had a few cars running 10-12lbs that really l liked 12.2:1, and some that really liked 11.8:1.