Stock Turbo Gauge?
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This is a discussion on Stock Turbo Gauge? within the Interior Mods forums, part of the Tech & Modifying & General Repairs category; My dad surprised me by ordering the stock turbo gauge in my car when we ordered it. I like the ...

  1. #1
    Registered User kTuLu42012's Avatar
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    Stock Turbo Gauge?

    My dad surprised me by ordering the stock turbo gauge in my car when we ordered it. I like the way the guage looks and all, but I am confused on how to read it. I am pretty sure .1 bar is 14 psi, that im not worried baout, but when the car is off the boost says 0, and when the car is runnign at an idle it is somewhere around
    -.05....i dont know why it is negitive. It also seems to be tied in with the revs until it reaches zero, where it then moves up according to my boostage..i think
    Thanks..
    Attached Thumbnails Attached Thumbnails turbo gauge copy.jpg  
    -- Ryan
    04' WRX Wagon Auto

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  3. #2
    Registered User Mr. Fancypants's Avatar
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    that is normal reading at idle
    04 SVT Lightning

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    Registered User kTuLu42012's Avatar
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    Fancypants,
    What does it mean? does it mean im doing opposite of regular boosting? What does 0 mean? does it mean im not boosting at all still?
    Thanks for the reply.
    -- Ryan
    04' WRX Wagon Auto

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    My understanding, although limitied, is this, and please correct me if i am wrong. The turbo is going to act as a restrictor unless is flowing enough air to maintain ambient pressure or increase pressuer. This is the way it think of it, when your car is idleing it is not generating enough exaust gases to spool up the turbo much at all. If you can picture a big fan in the middle of a duct, unless the fan is actually moving the air you are going to encounter some resistace to air flow, ie. you are gona have to blow and/or suck down the duct extra hard to work the air around the turbine. This will be the same in the case of your car turbo, at idle and other not so ideal load %'s of the engine the turbine is not spining fast enough to actual move the air that it is needed on a NA, naturally aspired (ie. non turbo/supercharged), car, thus your intake pressure is going to be somewhat bellow ambient pressure. This is why are cars feel like slow dogs up until around 3K rpm, unless of course you have mods . I hope this helps and i hope its all correct.

  6. #5
    Registered User kTuLu42012's Avatar
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    from my udnerstanding all cars create vacume like this, thanks for the help guys and i think ive got it figured out.
    -- Ryan
    04' WRX Wagon Auto

  7. #6
    Registered User Bishop's Avatar
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    0 = atmospheric pressure
    Anything under 0 = negative pressure
    Anything over 0 = positive pressure (boost)

    the stock boost guage reads in mega pascals.

    .1 MPa = 1 Bar = 14.5 psi

  8. #7
    Registered User gr8-wrx's Avatar
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    You could swap out the gauge for one that reads in PSI.
    2003 Subaru Impreza WRX (Cobb Stage2)
    2001 Honda CR-V SE

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    Registered User cliff201's Avatar
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    maybe I'm hijacking this thread ..... but- I need to get a turbo gauge that reads in PSI. Where is a good place to find one? I'm only seeing them for about 200 bucks and that seems alittle steep.

  10. #9
    Registered User KanosWRX's Avatar
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    You "need" to get one that reads in PSI or you just want one J/K. From what I remember VDO made a guage that was cheap and I think it read in PSI, as Ebr0t, he has it I think.


    My Mods


    "The most important mod is the one behind the steering wheel" - Koyokid RIP

  11. #10
    Registered User gr8-wrx's Avatar
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    Check out Summit Racing They have a good selection of VDO and AutoMeter boost gauges that are well below $200.
    2003 Subaru Impreza WRX (Cobb Stage2)
    2001 Honda CR-V SE

  12. #11
    tan
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    Thinking Man's Engine tan's Avatar
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    The VDO Vision boost gauge is about $30

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    Registered User 04blkWRX's Avatar
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    Yeah, mechanical boost gauges aren't much $$$ but I went to an electronic recently and I'm never looking back

    Try www.egauges.com

  14. #13
    tan
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    Thinking Man's Engine tan's Avatar
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    electronic gauges respond faster since it uses less tubing. The length and bends causes pressure drops which delay the response of the gauge.

    It uses a small length of tubing to reach the MAP, and the rest is electrons, for the most part

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