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Old 05-27-2010, 04:53 PM
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mechanical or vacuum advance

I'm building a 383 chevy, 4 speed, 3:73 rear, 3 Rochester 2G carbs. I am using a Mallory Unilite distributor. I have a mechanical and a vacuum advance distributor. Which one would work the best.

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Old 05-27-2010, 05:00 PM
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The vacuum distributor has both. That's the one you want.
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Old 05-27-2010, 05:00 PM
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You want both vacuum and mechanical advance.
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Old 05-27-2010, 07:01 PM
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Noooooooooooooooo. Not this again! OP, please use the "search forum" feature and punch in "manifold vs ported vacuum". You'll love it. (hint, you'll want to run full manifold vacuum).
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Old 05-27-2010, 08:37 PM
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Quote:
Originally Posted by curtis73
The vacuum distributor has both. That's the one you want.
Ya I know that. I talked to a tech at mallory and he said the total advance was the same in both and I didn't need vacuum for a non highway cruiser. Just wandered what opinions are out there.
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Old 05-27-2010, 08:40 PM
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Quote:
Originally Posted by cool rockin daddy
Noooooooooooooooo. Not this again! OP, please use the "search forum" feature and punch in "manifold vs ported vacuum". You'll love it. (hint, you'll want to run full manifold vacuum).
geeesss, lighten up. I didn't ask anything about manifold or ported vacuum annway.
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Old 05-27-2010, 08:43 PM
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Better to have the vacuum advance and not need it or use it than to want it at a later date and not have it. Plugs stay cleaner and last longer with it, and gas mileage is better, so that is two pluses for it.
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Old 05-27-2010, 10:37 PM
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What are the specs on the engine? How's the vehicle used? Some details will help decipher the options.

I'm curious what a "non highway cruiser" actually is...
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