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]

Thats guys. Running on 99 octane (UK RON)...not sure what your pump gas is normally, uk is 95 standard, so am only using our high octane equivalent. US use anti-knock rating I think, which is a bit lower value for the same effectiveness I think....maybe 94, when US pump gas is normally 87?? ?

UK fuel prices means this costs a bomb to fill up! - we pay over twice US price...

Maybe worth fitting the adjustable fuel pressure regulator then, and up it a bit before going whole hog and trying the 460s?

Really useful advice though, cheers guys!

This post has been edited by digs: Jul 22, 2013 - 3:26 PM