i was consistently running 18 in Hg at ~750-800 rpm. i installed a greddy dual air intake and noticed that the pressure is now 16 in Hg. if the intake does not affect the pressure reading, then what would make this decrease? nick
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air temp and density outside can affect it
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Barometric pressure outside can easily make a ~2Hg difference from day to day.
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My vac fluctuates from 15-20 depending on temperature outside. It also drops when i turn on the A/C.
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Idle speed also changes vacuum readings. IN my experience FDs seem to change the speed at which they idle from week to week.
Jeff |
Originally Posted by turbojeff' date='Sep 25 2002, 06:26 AM
Idle speed also changes vacuum readings. IN my experience FDs seem to change the speed at which they idle from week to week.
Jeff mike |
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