streetknight2

iTrader: (10)

NA motor on pump gas. what # should I be looking for?

TIA

massen1981

13-1 afr at wot

ZONES89RS

iTrader: (25)

12.7-13.0 at wot, 14.0-14.7 at cruise.

gsxkid

iTrader: (2)

i would go to the dyno and see what AFR the motor likes. every setup is different.

SS10Tech

With an NA setup i would add that colder plugs and pulling timing a few degrees may need to be done as well to prevent detonation or overheating of the spark plugs if running 91/93. Lean AFR's are more efficient but also a hotter burn because there are less excess fuel molecules to benefit whicking heat from the combustion chamber as a whole.

If you run 14:1 or higher AFR in a high CR setup a few extra steps must be taken into account.

ZONES89RS

iTrader: (25)

True, I only suggest those lean cruise numbers for stock compression.

tennerv8

iTrader: (7)

Mine is 11.5-12.5 afr at wot. I feel that I could lean it out some though. I may be leaving power on the table.