Quote:
Originally Posted by RotaryRocketeer
1976 GMC (the truck in my profile photo.)
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I'm sorry I have the signature feature turned off as some people like to share their life story in there, ha ha
Quote:
Originally Posted by RotaryRocketeer
15" vacuum at idle with advance unplugged and capped
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I would suggest you hook up a big analog vacuum gauge (big 4" ones I found to be more stable and reliable than those pesky 2" ones where the needle never stops jumping around) to your intake manifold and hunt around for better vacuum that cam should pull more than 15". 19-21 would rock your world
you'll need to mess with the idle mixture screws a bit and the idle speed screw a bit and go back and forth and back and forth
don't mean to insult your intelligence or micromanage you at all, I type and share a lot of detail in case others are reading this thread and I don't want to assume or insult anybody because I sense you know a lot already
just take your time and always ONLY CHANGE ONE THING AT A TIME and test