Quote:
Originally Posted by importman
Maybe I'm slow but I don't understand those numbers. But I've never used an app, just a vacuum gauge attached to an intake vacuum port. Vacuum is measured in inches of mercury. It should have a range of 0 to about 28 or 29. If the cat's clogged the vacuum will drop really low at wide open throttle.
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No, I'm sure I am the slow one. This is what I am seeing Going from 0 counter clockwise is vacuum. Going from 0 to clockwise is Boost or what I was calling +
The yellow and red marks on the gauge show the max that each range went. In this run it went to 16inches of push instead of pull.
Is it normal to see that much "boost" on acceleration?