stock vacuum?

Discussion in 'Engine & Performance Modifications' started by turbosocks, Mar 14, 2008.

  1. turbosocks

    turbosocks srt n00b

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    what is the stock idle vacuum supposed to be on these cars.. mine seems off to say the least.

    on my tiburon (which was obviously a custom turbo job) i was running about 23in/hg of vacuum.

    on other srt4s i have seen around 20in/hg of vacuum.

    at idle mine is around 15.

    but it boosts fine, just after it gets to about ~15psi or w/e stock is at, the needle bounces around and settles at like 11psi.

    any ideas.. id just assume figuring this out before i upgrade the WGA, BOV, hardpipes, etc.
     
  2. Dysphagia

    Dysphagia Full Access Member

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    vacuum depends a great deal on altitude, seeing that abq is approx 5800ft that is a perfectly normal reading.
     
  3. psi chick

    psi chick New Member

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    sounds like a boost leak
     
  4. kingnate

    kingnate Full Access Member

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    It also depends on the gauge.

    Stock gauge I read around 12 inHg switched over to an autometer ultra lite and I was at 20 and if I look at the reading off my scan gauge I am at 23, all at idle of course.
     
  5. turbosocks

    turbosocks srt n00b

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    ahh.. i never thought of the altitude thing.

    i was at like 600 feet before, and now i am like 5000 feet higher, so that could make sense..

    i also read different vacuum in detroit with my autometer and my megan racing guage by like 3-4in/hg.

    ill look into checking some of the piping connections/BOV tighteness, etc. and check if i have any noticable leaks.

    thanks guys.. and girls :thumb3: