DJGeQue

I was told that as your psi increase you ecu should supply more fuel, that make sense to me. Currently my car stays static at ~14 AFR. Does that mean car is running correctly because as the ecu is keep the car stoichiometric. Or should the afr actually drop lower?

arghx

iTrader: (3)

which wideband is it and are you sure it's working right?

Spirit-RE

iTrader: (25)

14 is good for idle/cruise. You are correct that afr's go down as boost increases. Look into aaron cakes website.

Everyone has a slightly different opinion, but at around 10psi and up, afr's should be no more than 12's, depending on which turbo/intercooler/aux injection of course.

RotaryEvolution

iTrader: (30)

the stock maps actually run a bit lean until around 4-5psi ish. most stock FDs i test for example run into the 14's all the way up until about 5psi where it then drops like a rock down to the 11 range at 10 psi.

RotaryRocket88

iTrader: (7)

^ Yes, my datalogs have consistently shown AFRs in the 13s when the turbo initially starts to build boost, but it quickly drops to a safer mixture (12s then 11s) as pressure builds. It all happens so quickly that's it's hard to notice without a datalog.