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Standard N75 v N75 'J'

Discussion in 'A4/S4 forum(B5 Chassis)' started by NineNails, Sep 8, 2010.

  1. NineNails
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    NineNails Proud sponsor of the snack food industry

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    [Sep 8, 2010]
    Is it worth swapping to the 'J' version N75 valve on a standard un-modified AJL engine? or is it only worthwile on remapped engines etc.
    Si.
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  3. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Sep 8, 2010]
    its not worth it at all imo.

    The valve has a differnt response curve which means it gains you a few psi, however because its not doing what the ECU expects it to do, you end up getting it dropping into limp mode etc.
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  4. NineNails
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    NineNails Proud sponsor of the snack food industry

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    [Sep 8, 2010]
    Thanks, yes I'd read this but noticed a few had done the change but wasn't sure if it was on a standard set up or not. I'll probably leave it alone now its working ok.
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  5. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Sep 8, 2010]
    it will "feel" faster due to the more agressive boost spike, but will taper off very quickly. Not ideal IMHO

    to also add, i didn't like it on mine so sold it on,lol
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