I'm thinking of installing an Air / Fuel gage in my Sprint to ease my tuning headaches. But I'm clueless as to all the options I'm seeing out there and the vast differences in price. I'm thinking of getting the gage from Summit (SUM-G2986) for $27.95, two of thier O2 sensors (SUM-G2989) for $29.95 a piece, and the weld in bungs from them for $4.99 a piece.

I have complete duel exhaust with no crossover so I was going to put a sensor in each header collecter and wire the gage on a switch to change between sensors.

Do any of you guys have any expierience here that could help me out or is my plan not to retarded?

If you are really trying to get an accurate measurement you should go with a wideband o2 sensor. They run around $350 for the LM-1. It's probably the best bang for the buck. I just picked one up to help me with my tuning.

Narrowband o2 won't get you very far unfortunately.

I have dual exhaust with no cross over and I plan on trying it on one side to start. I may add another bung to the other side if I feel it's necessary and just plug it in over there. We'll see.

I had an experience with a narrowband 02 kit, They are a complete waste of time and money.

Do as Ben said, 2 years ago they were $600, now down to $350..I use Exhaust Gas Temperature probes because I couldn't justify the wide band cost a few years ago since I spend a lot of time at the track and can use my ET and mph for tuning. But I have found that using the EGT has made me quicker and faster.

A wideband 02 is likely to find it's way into my header collectors this season.

Thanks for your input guys even thought I really wanted to hear that the cheap way out was gonna be O.K. I guess I'll save a bit more.

Originally posted by 71Sprint:
Thanks for your input guys even thought I really wanted to hear that the cheap way out was gonna be O.K. I guess I'll save a bit more. Yeah, I'm a cheap ba$tard too. But the more I researched the more I came to the same conclusion. Wideband is the only way to go. graemlins/thumbsup.gif

I've got the LM-1, and let me tell you, the narrowband is a waste of time and money. Widebands are the ONLY way to go, IMO.

LM-1 wideband. No question. I used one on my dad's 77 crew cab 3/4 ton work truck. Then engine was tuned to "yeah, that seems pretty good." Best mileage we could muster was 8mpg and performance was good. I used the LM-1 on it and retuned it. Got down to using 89 octane instead of the 92 he had been running, now pulls much better when it is 8000lb and over and, -and- the mileage went from 8 to 12mpg. Its a chunk of change to be sure, but man was it worth it. I can't wait to use it on the 383 in my Nova and the new 383 going in my brother's Camaro. BTW it also helped a lot even with the stock '72 402 in my other Nova.

are any of you guys with the LM-1 using the cigarette lighter to power and ground the thing or does it have to be hard wired into the car ?

thanks
Mike

Cigarette lighter.

thanks Matt