gerryk

Checked my A/F ratio--running lean above 6500rpm--down to 12.1 @8500rpm. I have AEMV2 intake and Js racing header-exhaust--no cat. No other mods--Help!!!!

soozookabluS2k

was this on a actual dyno?

NFRS2kSi

12.1 ain't lean. it's pretty good.

soozookabluS2k

u can always use a vafc and tune ur airfuel if ur not happy.

xviper

12.1 is almost just right for a supercharged car. For a NA car, that's rich.

iam7head

sorry but is that signal from a narrow band?

pushinlsteg

nothing wrong with a 12.1:1 A/F for FI. 12.5 and above is when things get iffy, 13.00 yeah time to add some fuel, pull some timing etc.

now N/A...13.00 is acceptable.

gerryk

my bad. I meant rich--not lean. yes its off a dyno and I am NA---What could cause this? I was thinking I might be pushin a little bit more air thru the engine and the computer is over compensating and making it too rich.

Sideways

Why don''t you show us a picture of it. It would help the discussion. Here is mine. It's boosted so it should be a little richer than yours.

Harpoon

NA can hit 14.4 before "lean" is an issue.