Quote:
Originally Posted by SD455DJ
We like to see a tan-light brown coloration on the plugs...very light tan & white is too lean, dark brown too rich. I think the timing all in at 36 degrees around 3200 rpm is a good starting point, but every engine has different octane toleration (93 assumed you're running), so you'll have to experiment next spring...but that is fun to do. You may have to modify your distributor to allow a bit more total advance by changing your advance bushing and trying to maintain 8-10 degrees initial with your compression (10+ to 1), so you have easier starting.
Dennis
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Cool!
Just checked it again. Hitting 36 degrees at 34-3500 rpm. I've got 91 non ethanol treated with 104 booster..