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Old 03-30-2010, 01:02 PM
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How fast is fast enough?
 
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20 inches at idle probably means you have your idle set too high. 15" or so is plenty, most shoot for 16-18", I'm happy with 5"- as vacuum in itself means very little.

To get it properly tuned you can use a vacuum gauge and plug reading, but the best way by a long shot with with a A/F gauge.

For this engine box stock setting won't be far off at all.


As for the exhaust question, widen the LSA by 2 and add 5-10 degrees to the exhaust duration.

No manifold is a good manifold though- the best though still lousy would be the LT1 manifolds you'd be surprised the difference a good exhaust can make. night and day.
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