Looks like you guys left the A/F meter subject a while back, but here's my 2 cents: They're worthless. I have 1 hooked up to each bosch o2 sensor and they give totally different readings. The readings are as follows: no signal, an occasional "blip", almost full rich and totally full rich. They dont seem to have a smooth continual sweep of readings.
I basically "read the engine" instead, but I'm carbed so it's no as much of a science as an art. Idle is put the screws in till it sputters and back it off 1 turn. Powervalve is 8.5 and primaries=secondaries is basically a guessing game of sniffing the exhaust, watching the temp guage and feeling the loss or gain of power with jet changes: 68's summer, 72's fall, 74's dead of winter.
Hope this helped some.
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91 GT Carb conversion, holley 600 double pumper, edelbrock performer intake, FMS "C" drop springs, march 1000 underdrive pullies, crane 1.7 roller rockers, GT-40P headers, bassani x pipe, american thunder catback, FMS 4.56's, msd aL6, trunkmount battery, A/C eliminator kit, 3000 stall tci streetfighter, AOD with transgo kit, A+ servo, 300M hardened lockup shaft, kevlar bands and 28,000 gvw trans cooler, 3 core radiator, 300 lbs stripped with a full interior
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