2+2

I have read the search results and it really appears that the air/fuel ratio guages are not useful or accurate in indicating a lean or rich condition.

Is this the consensus on this board?

I was going to get one together with a boost gauge when I chip my car but am having second thoughts since it appears that many people find them to be useless....

What's your thought? Advice?

Thanks in advance.

Russ Murphy

Well, the "resolution" let's say, is limited for sure on a single lead O2 sensor hooked up to an air/fuel gauge. How are you going to utilize it? As a warning device as you raise the boost? It'll work quite well for that. As a tuning device for determining your air/fuel mixture? Not so well, but doable. Check out the air/fuel readout from my dyno run. Pretty close really, and I was utilizing a single lead O2 sensor to tune.

2+2

That's pretty sweet power! But you've done the whole 9 yards with your stand alone!

As for me, I want to chip my 951, add a catback...and that's it as far as power is concerned.
I was planning on using the LBE and boost guage to dial in about 15-16 PSI with new chips (don't know which ones yet) and just want to make sure that it doesn't go lean!!

From what I have read, many of the led light gauges appear to be difficult to read and do not provide any meaningful info. If that's the case, I would rather not spend the money and the hassle of installing it.

Any other experiences and thoughts?

tazman

Well I have not ben able to compare mine to a dyno reading yet. So I just have it there to let me know if something changes. I am not sure what would be difficult to read about it. If you get the technical data about the gauge then reference that to what lights should be lit you can see where you are at.

951Tom

They look cool next to a boost gauge.....

dand86951

For initial tuning I wouldn't expect them to be very accurate. For example when I got mine from Powerhouse and installed on a car with K27DR turbo and Stage II chips with manual boost controller, it showed a borderline lean condition. This was at 14psi or so. When I got it to a Dyno the wideband showed I was running a 10:1 to 10.5:1 A/F ratio. (horribly lean)

After several runs comparing it to the wideband I now know how many lights are required to get to a good A/F ratio. It also now gives me a peace of mind that something hasn't gone haywire under the hood.

Dan

adrial

[quote]Originally posted by dand86951:
<strong>For initial tuning I wouldn't expect them to be very accurate. For example when I got mine from Powerhouse and installed on a car with K27DR turbo and Stage II chips with manual boost controller, it showed a borderline lean condition. This was at 14psi or so. When I got it to a Dyno the wideband showed I was running a 10:1 to 10.5:1 A/F ratio. (horribly lean)

Dan</strong><hr></blockquote>


You mean rich??

2+2

so these things are useful only if you take your car to have it dynoed with a wide band?

dand86951

[quote]Originally posted by adrial:
<strong>


You mean rich??</strong><hr></blockquote>

ABSOLUTELY I MEANT RICH!! WHERE DID THE WORD "LEAN" COME FROM? JUST PROVES FINGERS CAN BE FASTER THAN THE BRAIN, ANYWAY, MY BRAIN!

Thanks for the editing,

Dan

Russ Murphy

posted prev. by 2+2:
[quote] so these things are useful only if you take your car to have it dynoed with a wide band? <hr></blockquote>

No, the point of my posting the wideband readout of my dyno run was to illustrate how close you could tune the car with a "regular" air/fuel meter.