Hey Danno I have a question for you, I put in your 15psi chips and seem to run REALLY rich when on boost. My boost is at 15psi, I have a aftermarket guage, so what do I do? I would like to adjust it down some without increasing the boost, so where does that leave me? I know you offered me the 18psi chips, say if you get me a set, would it be able to get the right air/fuel then or would I still have to tune? Please let me know ASAP!! I know I have well over 20 rwhp missing because of the HIGH fuel going in. Thanks.

Mike

 

How do you know your running rich? black smoke under heavy driving or do you have an a/f ratio gauge?

 

a/f guages are useless anyway. even if you do have one. i have an autometer A/F guage, and the only time i can tell how the car is running is under full throttle, and even then, 2/3s of the LEDs are lit up (and thus the reason it is useless). Sense then i have installed the wideband and i get much better values as far as A/F is concerned. so i agree with hosrom, how do you know you are running to much fuel?

 

Unless if you installed an analog a/f ratio gauge, which shows you (in numbers) the ratio. This is a cheap alternative to the wide band, but not as accurate? LINK has one, should be good.

 

How do you know you're rich? In the upper-RPMs, the GURU chips will give you 10-15% more fuel than just about all other aftermarket chips. But you also get less in the low-end as well.

With the LED gauges, you only really know the exact air-fuel ratio when it changes from one LED to the next. That borderline transition will pinpoint the AFR at that moment. But when the mixture goes from 11.0:1 (too rich) to 13.0:1 (too lean), it still falls within the width of a single LED. So if it flickers between the 3rd and 4th to the last LED, you know you've got a 13.0:1 mixture and if it flickers between the 3rd and 2nd to last LED, you know you've got a 11.0:1 mixture. But if the 3rd to last LED is fully lit, you have no idea if you're rich or lean or somewhere in between.