Disturbed Bird

iTrader: (9)

what is the ideal AFR's for a n/a motor?

i thought it was 12.5 but looking at my dyno sheet from a couple of months ago it shows 13.0 and im making 450rwhp and 382rwtq. on just boltons and a cam with stock ls6 heads.

im about to get it retune as soon as i put the ported 90/90.

so back to my question.

what is the ideal AFR's for a n/a motor?

MPHmotorsports

iTrader: (18)

13.0 is typicially the sweet spot.
Of course it can vary, but most cars run the best at 13.0 or somewhere in that range.

Chris81

iTrader: (1)

It really depends on the motor combo, but generally in the 12.5-13.0 range.. sometimes a tad leaner.

MPHmotorsports

iTrader: (18)

BTW nice ****

Phil99vette

iTrader: (11)

I can usually find a couple hp from slightly richer @ peak tq and slightly leaner @ peak HP. Try to add some timing in both areas and watch the results.

12secSS

iTrader: (30)

I see the same results as Phil. Depending on the motor/setup, typically around 12.5 at peak TQ and between 13.0-13.2 at peak HP (some more radical setups will like a bit leaner).