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Boost pressure

Discussion in 'A3/S3 Forum (8L Chassis)' started by Mpathe, Jan 4, 2010.

  1. Mpathe
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    Mpathe 1st gear

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    [Jan 4, 2010]
    i was just messing with vag com and was wondering if 30psi is about right for a remapped s3 thanks mike
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  3. Dani_B19
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    Dani_B19 Audi-sports own special child.

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    [Jan 4, 2010]
    Is it running standard ko4 turbo?
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  4. Mpathe
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    Mpathe 1st gear

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    [Jan 4, 2010]
    yes just apr remap and a filter
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  5. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Jan 4, 2010]
    Then no... it isn't... too high... but... I suspect you have taken the reading direct from VAGCOM in mbar, need to subtract ambient pressure (typically around 1bar or 1000mbar) from that reading....

    30psi is round about 2bar 2000 mbar so in actual fact you are running about 1bar or 15psi of boost... in which case thats a little low for a stage 1 map...

    Can you post a screen shot of the logging?

    <tuffty/>
    Last edited: Jan 4, 2010
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  6. S3 Nattie
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    S3 Nattie Quattro ist für sissies

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    [Jan 4, 2010]
    30psi is about 2.1 bar. A remapped s3 will not get anywhere near that.

    Should be boosting about 20 psi i think for a stage one.
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  7. Mpathe
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    Mpathe 1st gear

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    [Jan 4, 2010]
    ok so that explains it then, i took it from vag com and i was thinking it doesnt feel like 30psi. so do you think i have a boost leak some where im fairly new to vag com and i just read it off the screen as it came so dont know how to post a log. thanks
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  8. s3_kev
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    s3_kev Stage2'd!!!!!!

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    [Jan 4, 2010]
    whats is a typical boost pressure for stage2 mapped s3's??
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