Title is self explanatory. Reason I'm asking is because I'm running a B16 that's built for boost on a stock ECU, stock injectors with stock everything hooked to it WITHOUT the turbo. This is a temporary thing until I can get things situated with buying a standalone, finding a tuner and a dyno.

I had the fuel pressure set at 38 psi at idle, which made it run at a 14.7:1 AF ratio at idle. This would dip down to the mid 11's with full throttle. It seemed to run a bit rough, and was also only getting about 15 mpg. So I'm guessing that a stock motor runs a hell of a lot leaner than that.

So now I adjusted the fuel pressure down to 30-31 psi which lets it run between 16.8-17.1:1 AFR at idle. When giving it full throttle it only dips down to 14.5 or so. Seems to be fine to me. It's also running a hell of a lot better. The butt dyno says it's got more power.

So yeah, anyway.
What's the A/F ration on a naturally aspirated and stock B16 supposed to be?
What is it at full throttle?

 

dont mess with that ****

leave it till you can tune and you have a turbo on it

 

Ok, no help there.
The car runs fine. As far as the computer's concerned, the engine's a stock B16A2 running 10.4:1 and it's firing the stock injectors as if it would on a stock engine.
Only difference is that I'm running 9:1 pistons.