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Old 07-22-2007, 06:57 PM
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took a compression test earlier on a couple of cylinders... all came out to just above 150psi

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  #17 (permalink)  
Old 07-22-2007, 09:18 PM
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Originally Posted by RPM
What about the mechanical advance? Say you get about 18 at idle with the vac disconnected. Rev the engine up, vac still unhooked, what have ya got now. Just for an example. 20 degress initial, rev it up 20 more for a total of 40 with the mech, now hook up the vac and see if it goes to about 50-60 degrees total advance. Sounds like the mechanical weights in the dizzy may be stuck.
Without vacuum connected it changes by 15* advance from static to total timing. So where it likes to run best is at 30* static timing without vacuum, it pulls 45* total. With vacuum advance on it, it still should only pull 45* total at wide open throttle. The vacuum advance diaphram i have on it has the ability to add an additional 15* though.

Originally Posted by 454C10
was that carb used on a circle track?

most times they remove the power valve and jet up 8 or 10 jet sizes. Makes for a bad running street car.
Yeah it was used on a circle track stock car. The funny thing is, it appeared to have stock sized jets in it at the time that I rebuilt it. For some reason I thought I would need more fuel so I bumped them up by 2 sizes. It's definitely rich but not too terrible. I think bumping down 4 sizes from where it is now (or 2 down from stock spec) will get me about where it needs to be. Of course this is by amateur plug reading.

Oh and it does still have a power valve... I believe I renewed it with a fresh 6.5 at the time
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