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

[lagos]

Piggy backs will never give you a good tune because they are always trying to fool the stock ecu into doing something different. For the same money you can buy a full stand alone like megasquirt and control every aspect of your car.

As for knock control, If you can fully tune the car (not just trick it into doing something), then you can tune it so that it runs without any knock.
But yes, some type of knock control is still a very good thing to have. This was an issue of concern with my diypnp that just features very basic knock control, so I picked up a used JS Safeguard for my setup. Its been a very handy unit, and Id say its actually better than the factory knock control system, especially since I can actually see when its detecting a problem.