Vacuum Question
Apr 1, 2008 | 01:57 PM
Thread Starter
Instructor
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From: The Ham AL
Vacuum Question
If you have a higher lift cam in the engine, would you expect a lower vacuum?
I understand that good vacuum on a stock engine is around 18-20 inches of Hg.
I have confirmed that my vacuum at idle is 11-12 inches of Hg.
I haven't had my car long and it sounds and feels like I could have a different cam.
What do ya'll think?
Apr 1, 2008 | 02:53 PM
Race Director
Joined: Sep 2000
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From: The Top of Utah
Quote:
Originally Posted by mcfack
If you have a higher lift cam in the engine, would you expect a lower vacuum?
NO. Lift and vacuum are totally unrelated. The same is NOT true of duration, and/or overlap, however.
RACE ON!!!
Apr 1, 2008 | 10:08 PM
Burning Brakes
Joined: Apr 2006
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From: Houston Texas
Quote:
Originally Posted by
CFI-EFI
NO. Lift and vacuum are totally unrelated. The same is NOT true of duration, and/or overlap, however.
RACE ON!!!
If your vacuum level was at spec for a stock LT1 before cam swap to LT4 Hot Cam, about how much would it drop from the stock cam?
Apr 2, 2008 | 08:19 PM
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From: The Ham AL