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How much Vacuum you run at idle?

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Old 02-18-05, 03:50 PM
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How much Vacuum you run at idle?
Just wondering how much vacuum you guys are running on idle?
Bigger turbo give you less vacuum at idle?
I dont think so but..Does exhuast leak affect vacuum?
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Old 02-18-05, 04:34 PM
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I have a big street port. So I pull about 10psi of vacuum at a 750 idle, and 17 at 1100rpm idle.

Porting affects idle vacuum.
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Old 02-18-05, 04:57 PM
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Mine ranges from 10-18 on my 750-1k idle. I have a street port.
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Old 02-18-05, 05:07 PM
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I have a 91 T2 ...stock engine with basic mods...

Vac at idle is about 17-18...sometimes it varies depending on outside temperature.
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Old 02-18-05, 05:09 PM
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I pull -0.5 to -0.6 bar (about -7 to -8psi) vaccuum at a 750 rpm idle. Reman engine with 125psi compression on both rotors.
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Old 02-18-05, 05:31 PM
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-19.9 InHg
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