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cliyde cliyde is offline
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Join Date: Apr 2006
Location: Hurricane Region, NC
Posts: 592
I'm seeing a small swing between 14.5- 15.5 hg of Vac at 850 RPM. Engine has 85K miles so possible worn valve guides could be contributing to that reading. I'm due for valve adjust and plug re-gap so I'll re-check soon.

From what I've read, it's not uncommon for performance tuned engines to read 14-16 hg vac at idle. I would like to think ours fit that category!
Originally Posted by jcc911 View Post
Shay, so where is your vac at idle? Thanks
- '88 911 (3.6 Transplant, Big Reds, Coilovers)
- '12 Audi B8 S4 (6MT)
- SOLD! '84 911 3.2 Turbo Targa
- SOLD! '85 928S 5sp with LSD
Old 08-19-2011, 03:39 AM
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