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Thread: funny boost

  1. #1
    Neutral

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    funny boost

    having trouble with my boost, if my s3 is driven fast (foot flat to the floor through the gears ) the boost spikes right up 2 bout 14 psi and holds bout 10 ish. but if driven normaly ie on the motorway, and then i go to accelerate the boost struggles to build up and barely reaches 8-9psi.also as the boost gauge is climbing it seams to be fluxtuating up and down, could this be the dv not holding the pressure??
    its not had a re-map,also got new n75(j), and checked for leaks!!

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  3. #2
    Sandip's Avatar
    6th Gear

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    What is the gauge been tapped into? Its sounds like you may have a leak somewhere
    3.2 V6 with Custom Code VVT Attack Software


  4. #3
    Chugger

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    hmmm, i heard that N75 J's dont work for everybody??

    boost or vaccum leak possibly

  5. #4
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    the boost gauge to pluged into the top of the dv, maybe i should try the standard n75, how can i test the dv??

  6. #5
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    Frank

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    My friend had boost flux problems with his j valve, he adjusted the screw on the valve which sorted it (after some trial and error).

    He was boosting about 22psi/holding 20psi tho on mapped software.

    R-Tech remap - Forge 007p - Forge carbonio - Janspeed catback - N75h - Coilovers - TT comp rims - Powerflex bushes - EBC stoppers

  7. #6
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    which screw is that??

  8. #7
    feville's Avatar
    Frank

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    On top of the valve there is a hole machined out to access a flat screw (T fitting on the bottom) this adjusts the valves internal spring tension. Pretty sure there are some threads out there on it, i haven't had any experiance myself but it could be worth a shot?

    R-Tech remap - Forge 007p - Forge carbonio - Janspeed catback - N75h - Coilovers - TT comp rims - Powerflex bushes - EBC stoppers

  9. #8
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    Alex

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    Also try changing where you plumbed your gauge into, don't think its 100% when using the dv vacuum pipe.
    T piece from the fuel regulator, I've never had a problem with it.
    1999 APY S3 Imola Yellow

    PS3: Broady_11

 

 

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