I have never had a holley before, and ended up with a 750 Ultra double pumper. Actually, I've been EFI for so long I figured I wanted to go full old school in the tuning too, so just read plugs to dial it in. Learnt alot, and still have a couple things to play with before checking with the wideband.
Ended up with 68 primary 80 secondary mains, 8.5 power valve pri, 6.5 pv sec, 37 squirter pri, 28 squirter sec, pink pump cam, and a 50cc primary accel pump.
This is to show how much you can change to dial a carb in, or maybe how much you have to. I'm no means an expert, but it IS trail and error with every engine. I get 21mpg with 412ci at 1800rpm and 75mph. So I think I'm close to optimum for my setup. I'm still going to try to drop to 66 in the front with a green cam to see what happens. I am getting to the point of wanting to check with a wideband though!
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1969 Camaro SS, Maggied LS2, T56, Fab 9, G-Link, Speed Tech sub, Fikse FM10s....sold
1963 Nova SS, 383sbc, 700r4, 3.73 8.2, CPP 4wdiscs, Cragars, mostly driven by the GF.
1973 Camaro RS, 454 BBC, T400, 3.73 8.5, newly acquired full resto, next PT project.
1995 Camaro Z28, 440ci SB2.2, T56, 9", PB 9.70 @ 142mph - 2011 Hot Rod Drag Week 2nd place BB/NA
2009 TBSS 2WD 3SS, cam, exhaust, 450rwhp DD.
Last edited by Tweaked Zed; 01-18-2012 at 09:15 PM.
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