Quote:
Originally Posted by eastbay
You did not mention a wideband, so assume you don't have one. Seems crazy in this day and age to read plugs and guess when widebands are so cheap and informative.
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+1 if you have a bung in either or both headers it's foolish not to have one of the AEM gauges on board if your tuning carbs sans dyno. sure, reading plugs is good in telling how it's running cylinder to cylinder, but plug can change from moment to moment under varying running conditions so they can fib some. I have bungs in both SSI's and go from bank to bank, left to right every four or five months to check in on that three......
I have nearly the same set up. 9.5-1, early 3.0L, the same 120/104 cams, 40mm webers with 36mm venturi. ive fooled around with a ton of jetting combinations. ended up with 160 mains that were consistently best through out the set up process. 60 idles after going up and down with varying AC efforts. ive gone from 170 to 185 in increments of five and am currently running 175air correction.
thing I found with the webcam grind we've chosen that it likes to run rich on the idle circuit no mater what you do. with F3 ETs it ran rich across the mains too on pump gas no matter what jets I implemented. I went to n F8 ET and it leaned me out across the entire range. it's still high 10,s low 11,s air fuel per my gauge at idle, spikes a bit lean for a second if I get on the mains too quickly, and is mid to high 12,s n freeway and high rpm.
im surprised with thw 10.5 CR a twin plug was not mandatory on pump gas.
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