How much is too much vacuum? - Team Camaro Tech
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post #1 of 9 (permalink) Old May 13th, 01, 09:28 AM Thread Starter
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What is the right amount of vacuum and how do I figure out if I need to lower the amount of vac due to the weights in the distributer?

I'm not pinging or detonating, but I would like to perfect my vacuum to get the best possible acceleration. Plus it's allways good to learn something new.

give me the low-down.
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post #2 of 9 (permalink) Old May 13th, 01, 03:56 PM
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Vacuum is not adjustable, and has nothing to do with the weights in the distributor. Vacuum is a function of the engine design, intake manifold, and the camshaft profile. The weights and springs in the distributor determine the starting point and the rate of increase in centrifugal spark advance, which is totally independent of manifold vacuum.

You can learn more about how your engine works by buying a book like "How To Rebuild Your Small-Block Chevy" by David Vizard - published by HP Books.

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post #3 of 9 (permalink) Old May 13th, 01, 07:08 PM
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DAVID VIZARD is awsome ,buy all the books you can from him if you're serious about learning,but he's very detailed and sometimes the reading material can lose you,the good thing is you can always read it over and over again and learn new things you missed the first time.
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post #4 of 9 (permalink) Old May 14th, 01, 09:19 AM Thread Starter
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Thanks for the info guys!

I'll check it out
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post #5 of 9 (permalink) Old May 15th, 01, 08:32 AM
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David also answers his e-mail at his site
http://www.mortecmag.com

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post #6 of 9 (permalink) Old May 16th, 01, 09:00 AM Thread Starter
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One more quick question.
I'm getting a 20-21 vacume from my 327. Is this normal for a stock block, heads, and cam? It seems like alot to me.

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post #7 of 9 (permalink) Old May 16th, 01, 09:54 AM
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That means it is in excellent condition and running well.

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post #8 of 9 (permalink) Old May 23rd, 01, 03:46 PM
 
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that kind of vacuum sounds like pretty much a stock motor in good shape. should be torquey off the line
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post #9 of 9 (permalink) Old May 24th, 01, 02:02 AM
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I tried mortecmag.com and got an invalid address. Is this the same as mortec.com?
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