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jeffspower · 11-08-2007, 08:55 PM

You can do a "cheapo" A/F tuner trick (like I do

). Weld in an o2 bung. Install cheapo parts store single wire o2 sensor. Attach a wire & run it into the cab. Attach a DVOM to it, and set it to the MV scale. 0 MV is way lean, 1000 MV is way rich. Shoot for 200-400 MV in "leisure" cruising, and 600-800 MV WOT. You will learn quickly if your carb is all- around too rich or if the power valve is coming in too soon. I'd bet your Edelbrock is way rich & all- around out of wack. Buy a jet/ calibration kit & have fun

11-08-2007, 08:55 PM	#8
jeffspower Well, Whoop-dee-do! Join Date: Mar 2003 Location: Easton, Mo. pop.- me & scarcely a few others Posts: 2,302	Re: Normal MPG from 400 SBC You can do a "cheapo" A/F tuner trick (like I do ). Weld in an o2 bung. Install cheapo parts store single wire o2 sensor. Attach a wire & run it into the cab. Attach a DVOM to it, and set it to the MV scale. 0 MV is way lean, 1000 MV is way rich. Shoot for 200-400 MV in "leisure" cruising, and 600-800 MV WOT. You will learn quickly if your carb is all- around too rich or if the power valve is coming in too soon. I'd bet your Edelbrock is way rich & all- around out of wack. Buy a jet/ calibration kit & have fun __________________ '68 GMC shortbox 4x4 350/SM465/T221- bought it in '83 SOLD '72 K20 500 Cad/TH400/NP205 SOLD '92 Chevy 2500 6.5 mech TD 4L80E crusty daily driver '72 Monte Carlo... sweet low mile toy '11 Dodge Challenger IE 392 6spd... midlife car