Re: Holley 800 Baseline Tune? bbc
On a used carb I like to dig a little deeper, make sure none of the air bleeds have been drill or if they have at least know what they are, you never know who has drilled out power valve channels restrictors ( pvcr)or the air bleeds.
If you rebuild it make sure EVERY passage is clear and verify, after cleaning and compressed air, I'll use a can of carb cleaner and spray into every hole and verify it comes out the other end, for a newbe this is a good excise so you learn the passsages and maybe pick up a little how the carb functions. Of course use a straight edge to make sure things are flat, I have come across many base plates where the corners are warped from over tighten carb nuts, some I have been able to sand(on flat glass) or file flat( big flat bastard) if not to bad, some have been cracked and need replaced.
Normally the 50cc is in the rear and most generally a 30cc pump in the front is all that's needed, no need to squirt anymore fuel than needed.
Hope some of this helps.
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