Quote:
Originally Posted by ThreeQuarter
Al, thanks for the document--very informative and the kind of explanation I have been needing to find. However, given that the ported vacuum port on my carb does not pull any vacuum at idle and it's disconnected while I'm setting timing, I am not sure how that could be contributing to my issue. Feel free to spell it out if I'm missing something.
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Most engines prefer full manifold vacuum. I use ported vacuum once in a while if an engine doesn't seem to like a lot of timing at idle. I'd say give that 327 some more timing at idle.