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]

Thanks again for all the replies guy, really do appreciate them.


emanage runs off the map sensor (so the 3sgte one I have installed) though it does have its own I can buy to.

Your right, the airflow map changes the map signal the ecu sees, using that to add or subtract school.

However it can also add fuel through increasing the injector duty cycle, which could be a solution as well.

I am going to connect the wideband to the emanage, and log map pressure, af, throttle, injector duty cycle and revs, and see how they correlate at the moment, then work from there. I have some good ideas now on where I should be aiming, which is really good. Can make off boost checks first, then partial boost etc, trying to keep safe and backing off if underfuelling.

Will finish my electronic det mic so can record engine noise at the same time as logging data, as another dimension to the data.

Like suggested, will fit the fpr, as it is just sitting there at the moment, and can always set it to stock.

Will report back on how it all goes!