Boost doesn't go over 5mpa is what boost gauge reads? why?
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This is a discussion on Boost doesn't go over 5mpa is what boost gauge reads? why? within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; So today I just installed the restrictor pill back onto the car cause previous owner must have removed it. Boost ...

  1. #1
    Registered User Crazygerman's Avatar
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    Boost doesn't go over 5mpa is what boost gauge reads? why?

    So today I just installed the restrictor pill back onto the car cause previous owner must have removed it. Boost does not go over .05MPa that is what boost gauge is marking. ??? Any input on this??? Is this normal boost level? 02 impreza wrx .....thanks a bunch!
    Last edited by Crazygerman; 01-04-2014 at 05:54 PM.

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    Registered User Crazygerman's Avatar
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    Any advice is well appreciated thank you!

    Crazygerman02WRXWagOn

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    What are those units again?

    Can't be megaPascals (MPa).

    20 PSI is roughly 140 kPa (kiloPascals).

    Sent from my KFAPWI using Tapatalk HD

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    Registered User Crazygerman's Avatar
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    Yes Sir the factory boost gauge on the steering has....0 to .05 , .1 , .15 going up and down 0 to.-.05, -.01 and it has MPa. I ii

    Crazygerman02WRXWagOn

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    Registered User Crazygerman's Avatar
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    I don't know what the MPa stands for.. I was thinking it measurement but I have no clue. And now with the restrictor pill it wont go over the .05 mark?

    Crazygerman02WRXWagOn

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    Registered User Crazygerman's Avatar
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    Crazygerman02WRXWagOn
    Attached Thumbnails Attached Thumbnails uploadfromtaptalk1388882249758.jpg  

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    Registered User wreckingball man's Avatar
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    If it's the factory boost gauge it should read in bars.

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    Registered User Crazygerman's Avatar
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    Yes today at dealership they said it is a factory gauge that came as an option. The pic shows exactly what I have. It only goes up to that positive .05 will not pass it in any gear.???

    Crazygerman02WRXWagOn

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    Quote Originally Posted by Crazygerman View Post
    Yes today at dealership they said it is a factory gauge that came as an option. The pic shows exactly what I have. It only goes up to that positive .05 will not pass it in any gear.???

    Crazygerman02WRXWagOn
    Ah, that pesky decimal point.

    0.15 MPa is 21.55 PSI. I don't know the spec on an '02, but 7 PSI (less than 0.5 bar) seems low.

  11. #10
    Moderator Donkey's Avatar
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    Where did you put the pill? Should be about .1 Mpa at peak boost​ tapering to around .5 Mpa on a stock vehicle.
    Resident Adviser @ WTF Tuning, LLC
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  12. #11
    Registered User Crazygerman's Avatar
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    Thanks you all for the advice and help!

    Crazygerman02WRXWagOn

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