Vacuum at around idle

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05-30-06, 04:25 PM

slo

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Vacuum at around idle

Hi, I think I may have a vacuum leak on my project car.

So the question what is the expected vacuum at and around idle for a 13b turbo?

Thanks,,,

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05-30-06, 04:27 PM

mort2002

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i know that my 89 TII gets about 15 to 16

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06-08-06, 06:02 PM

marshp

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im sittin at around 12

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06-08-06, 06:04 PM

mort2002

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how many miles are on your motor.. also what guage are you getting your reading from?

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06-08-06, 06:24 PM

eriksseven

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I see around 16mm/hg (or whatever) at 1000RPM's and about 11mm/hg at a 700RPM idle. My motor is a street-ported, RA seal'd rebuild with about 17k miles. I've got an Autometer gauge.

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06-08-06, 07:04 PM

Boostmaniac

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Any amount of porting will reduce vacuum at ~750rpm idle. I think I remember reading that 16 mm/Hg is a good indication on a stock motor of healthy seals.