How To Read A Boost Gauge?
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This is a discussion on How To Read A Boost Gauge? within the Everyday Impreza Talk forums, part of the Community - Meet other Enthusiasts category; Hi I'm new to the whole turbo cars world...I bought a 05 wrx and it came with the subaru boost ...

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    Registered User oriol's Avatar
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    How To Read A Boost Gauge?

    Hi I'm new to the whole turbo cars world...I bought a 05 wrx and it came with the subaru boost gauge...It might seem stupid for some but I don't know how to read it... if i go really fast it goes up to .1 it never gets to .15 and some times when I'm accelerating it starts going up and then goes down a little then back up...please someone who explain to my how it works, which are the good and bad readings?


    Thanks

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    Registered User BigB007's Avatar
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    The subaru stock boost gauge reads in mpa and not in psi so you would need a converter like this one and at max boost it should be a little under .1mpa on your boost gauge which equals 14.5 psi and the stock boost on a wrx is 13.5psi.

    Hopefully this helps, good luck.
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    Administrator TheJ's Avatar
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    Quote Originally Posted by oriol View Post
    Hi I'm new to the whole turbo cars world...I bought a 05 wrx and it came with the subaru boost gauge...It might seem stupid for some but I don't know how to read it... if i go really fast it goes up to .1 it never gets to .15 and some times when I'm accelerating it starts going up and then goes down a little then back up...please someone who explain to my how it works, which are the good and bad readings?


    Thanks
    Quote Originally Posted by TheJ View Post
    Welcome to the Club!


    The stock boost gauges, on both of my WRX & STi, measure in MPa. "MPa" is Megapascals (The pascal unit is named after Blaise Pascal, the eminent French mathematician, physicist, and philosopher noted for his experiments with a barometer. The name pascal was adopted for the SI unit newton per square metre by the 14th CGPM in 1971.)

    The conversion of Mpa into psi is basically: .10 MPa = 14.5 psi (Actually it's more like 14.503770000000001 psi, but 14.5 is close enough.). Or you could always just go to one of the many conversion calculators on the web like this one. As far as what it is going on when the gauge is moving... That's a little more then I feel like typing at the moment but read here....
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    Question: How do you end up with negative boost?

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    Registered User 68sprintb's Avatar
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    it's means it's less than atmospheric pressure, so you'd subtract the reading in the negative scale
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    Registered User tom'sti's Avatar
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    Quote Originally Posted by ww_Crimson View Post
    Question: How do you end up with negative boost?
    Whoever appeals to the law against his fellow man is either a fool or a coward. Whoever cannot take care of himself without that law is both. For a wounded man shall say to his assailant,"If I live, I will kill you. If i die, you are forgiven. " such is the rule of Honor.

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    Registered User scrogers's Avatar
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    Quote Originally Posted by ww_Crimson View Post
    Question: How do you end up with negative boost?
    It's also called vacuum. This is also why sometimes they are referred to as vacuum or vacuum/boost gauges.
    Last edited by scrogers; 12-02-2007 at 09:56 PM. Reason: Can't Spell...

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    Administrator TheJ's Avatar
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    Quote Originally Posted by RayfieldsWRX View Post
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    Registered User wrx wagone's Avatar
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    Quote Originally Posted by ww_Crimson View Post
    Question: How do you end up with negative boost?
    ur b00st check valve must be teh b0rked.
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    Administrator RayfieldsWRX's Avatar
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    Quote Originally Posted by wrx wagone View Post
    ur b00st check valve must be teh b0rked.
    Check the boost fluid reservoir.
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    Quote Originally Posted by RayfieldsWRX View Post
    Check the boost fluid reservoir.
    yes make sure you have boost fluid
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    DUB
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    Quote Originally Posted by RayfieldsWRX View Post
    Check the boost fluid reservoir.
    Quote Originally Posted by rr1911 View Post
    yes make sure you have boost fluid
    Isn't the point of the boost gauge to monitor your boost fluid level?

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