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Thread: N75 valve

  1. #1
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    N75 valve

    im needing an N75 valve to sort out my boost problem, ive read threads about an N75 J valve, is this an upgraded one that would be worth getting instead of the standard? also an idea where i would source a valve as i would imagine audi would be V expensive?

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  3. #2
    3rd Gear

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    Do a search mate, been covered loads!
    As for the j valve, i think its a bit hit and miss, some say they are really good, others say they are a waste of time.
    I personally dont think they are that good as they just cause the boost to spike, i have also been told by a very good tuning company that the j valve is a waste of time

  4. #3
    Pete20vt's Avatar
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    I bypassed the N75 altogether on a my 1.8T Ibiza, seemed to really sharpen things up a little. Am no expert but the ins and outs are the same so maybe possible on other 1.8Ts.
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    s3dave's Avatar
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    Quote Originally Posted by wilcog33 View Post
    im needing an N75 valve to sort out my boost problem, ive read threads about an N75 J valve, is this an upgraded one that would be worth getting instead of the standard? also an idea where i would source a valve as i would imagine audi would be V expensive?
    ive been running the j valve a few weeks with no problems, seems to differ car to car though, around 60 from audi

  6. #5
    Chugger

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    I have a J valve sitting around if you would like one. I didnt notice much with it.

    The difference with the J is that due to its workings it reacts slower and as said causes a bigger spike, which will throw the car into limp mode if spike is too great. I would say stick with standard
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    Pete are you sure you bypassed the N75, do you not mean the N249 which controls the dumpvalve?
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  7. #6
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    My mate has kinda done this on his Ibiza Cupra due to his actuator which is buggered up. He's done something along the lines of missing a beat on his N75.
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