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Originally Posted by Don
Byron......many thanks, 3 dealers in CT and the initial contact has been made with Tuner Tools.
Have you actually used the UEGO wideband system ? Any specific tuning advice ?
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Yes, I've had the opportunity to use a variety of wideband systems. I was heavily involved in the bay-area EFI tuning scene for about 10 years, and still do this once in a while for friends.
I'd be happy to offer specific tuning advice, but for what kind of induction?
In general, you're shooting for 14.7:1 ish AFR at idle/cruise (lean), and 12.5:1 AFR when applying/desiring power out of the engine. With a carburetor, achieving this will involve specific adjustments (jetting) and possibly more modifications to the carburetor...but in general, they should be close out of the box.
Since you're just starting, AFR stands for Air/Fuel ratio which is literally Air Mass divided by Fuel Mass. In other words, for every 12.5lbs of air entering your engine, you want 1lb of fuel to go with it at wide-open-throttle (WOT). In an ideal world, you'd like the ratio to taper back to a nice lean 14.7:1 at idle and very light throttle cruise...and be just about linear in relationship to your foot from idle/cruise to WOT. Richer on your way up, leaner on your way down. You can see why it's easier to use a meter that gleans this information from spent exhaust gasses than it is to measure what is entering the engine. Thank god for the cheap UEGO sensor...that's a relatively recent invention that has made life a whole lot easier.