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  1. #1
    If i knew,...I wouldn't ask sea-one's Avatar
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    Boost gauge-positive or negative pressure?

    Hey guys im pretty sure i did it wrong because BOOST means boost on the gauge right? anything + 0 ? and anything below -0 is vaccume ? well i put the gauge supply between # 2 & 3 runners on the intake and the gauge reads a negative when its running please



  2. #2
    Banned User
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    its more then likely correct, motor makes no boost till about 5000rpm and the gauge will read negative (vacuume) untill then.... had a chance to water test it yet and put that to test?

  3. #3
    If i knew,...I wouldn't ask sea-one's Avatar
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    No,not to the lake yet and i just finished a full rebuild last night and fired it up today for a final check on everything and i didnt really know what to think about that reading,,thanks sir

  4. #4
    Nothin' better than Doo'in it! BigDaddyRXP's Avatar
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    You should see around 5-6 pounds of vacuum at idle, then the boost will kick in around 6k rpm.

  5. #5
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by Mike H View Post
    its more then likely correct, motor makes no boost till about 5000rpm and the gauge will read negative (vacuume) untill then.... had a chance to water test it yet and put that to test?
    +1

    Perfectly normal.

  6. #6
    2006 Turbo RXP boBO's Avatar
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    Quote Originally Posted by bigdaddyRXP View Post
    You should see around 5-6 pounds of vacuum at idle, then the boost will kick in around 6k rpm.
    With Turbo i see 14~8 vacum @ idle that what my Eboost controller

  7. #7
    HighPSI's Avatar
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    Should be 10-12 inches at idle

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