3SFTE A/F Ratio advice Options

[digs]

Hi, can I ask those who have had experience in this what kind of ratios they expect to see runnning their 5sfte or 3sftes?

I have a wideband, which fluctuates around 14.2 to 15.3 at idle, and 13.5 - 15.1/2 ish off boost runs. The AEM wideband gauge does continually fluctuate though, going through various ranges constantly.

I did do boost run to see, and was measuring 12-13s on WOT. Only 2 runs as not sorted det cans yet so not monitoring detonation. No more boost runs till I work on that.

This is using 295cc injectors, stock pressure. I do have 460cc injectors available too, as well as an afpr, and have emanage blue fitted.

What is the expected values and also, should my wideband be CONSTANTLY fluctuating ? As I will have issues with street tuning as it is never on one value for long ? Or do you guys look for a range?

Any experience would be gratefully received and listened to.

This post has been edited by digs: Jul 22, 2013 - 3:27 AM

[digs]

Ok, so I am understanding the issues now (I can listen to opinion but until I try it I won't really understand).

There is 2 ecus, closed loop and it's just sits at stoich, open loop and I can fuel plenty actually to cope with boost, but the transition from closed to open can happen in boost, so it can run lean in low boost. Seems to need a foot jammed right down to hit open, and the right fuelling.

So run in two modes. With a standalone, this wouldn't happen I assume and you can tune the full range.

Got the wideband hooked up to the emanage now, so will test tomorrow just when I will hit open loop as should see the throttle position % and af logged.

Loving investigating this though, only one way to learn

And putting a little cash away for a 3sgte transplant in the future....