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  1. #1
    AUDI TURBO's Avatar
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    N75J VALVE ORDERED

    it be here tom ill let you all know what differnece it makes
    Modified primera :-)

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  3. #2
    AUDI TURBO's Avatar
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    IM HOPING THIS CURES MY SURGING PROBLEMS I HOPE
    Modified primera :-)

  4. #3
    Bong Water's Avatar
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    Is this the factory dump valve? Says you have a Forge why you getting rid of that?
    What Corolla does you parents have!?
    Skint because of my car, the forums made me do it

  5. #4
    Jared71482's Avatar
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    The N75 valve is different from the dump/diverter valve. The N75 controls when the wastegate on the turbo opens... regulating boost. The dump/diverter valve vents boost when the throttle is released, avoiding damage to the turbo and turbo lag.

  6. #5
    Bong Water's Avatar
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    Sorry yeah someone did explain it to me the other day, I keep getting the bloody things mixed up
    Skint because of my car, the forums made me do it

  7. #6
    951
    951's Avatar
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    What are the symptons when this valve is faulty ??
    A4 Avant 1.8T Sport (183 bhp).

  8. #7
    macca's Avatar
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    low boost pressure, sometimes little boost, followed by loads of boost. inconsistant boost under the same conditions.

    someimes sticking or worn actuators cause similar problems.
    1998 A4 1.8T Sport - For Saturdays
    2003 VW Golf MKIV R32 - For Sundays
    2000 Peugeot 406 HDi - For when it's raining
    1996 Kawasaki ZX7R - For when I'm late for work!

    Mods- Forge Dump Valve, The Engine Shop Power Plus based Engine (Low Comp. Forged pistons, Arrow H-Section Rods, Newman fast road cams, polished & ported head), 19" wheels, B&M Short Shifter, Greddy Turbo Timer, RS4 Grill, Weitec GTN coilovers, HKS modified air filter, Autobahn88 FMIC, ChippedUK custom map. Some Turbo mods ongoing.

  9. #8
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    does the 1.9TDI have this arrangement too? mine displays some of the things mentioned; mainly inconsistantsy and surges. maybe its time to dig out my vag come lead and give it a try!

    Quote Originally Posted by macca View Post
    low boost pressure, sometimes little boost, followed by loads of boost. inconsistant boost under the same conditions.

    someimes sticking or worn actuators cause similar problems.

  10. #9
    AUDI TURBO's Avatar
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    fitted and ive LOST power peaks at 10psi!!!!!!!!!!!!!!!!!!!!!!!!!!! makes no sense. help the pipes reamin the same dont they??? same place??
    Modified primera :-)

  11. #10
    AUDI TURBO's Avatar
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    and parents car is a tsport corolla!!!!!!!!
    Modified primera :-)

  12. #11
    AUDI TURBO's Avatar
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    3rd gear used to hit 12/13 psi now just hits 10psi??????? it doesnt feel remapped any more. i know the J valve fits differnt so the wire needs moving etc but the top pipe is still the pipe that goes to the acuator isnt it?? sam eas my old vlave was?
    Modified primera :-)

  13. #12
    Broken Byzan's Avatar
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    The long one is the one that goes to the TIP, otherwise the same IIRC

  14. #13
    "Stick a V8 in it!"

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    what kinda mileage has your car done and has the turbo ever been replaced?

    I've seen a lot of turbos require replacement around 120-160k miles (the one on my car was changed at 130k) and its usually issues with holding boost that is the problem.

    I'm just wondering if the problem is infact your turbo instead of software or electronic issues

  15. #14
    AUDI TURBO's Avatar
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    LONG ONE IS INTO MY AIR INTAKE PIPE??? CAR DONE 98K???
    Modified primera :-)

  16. #15
    Jimbo.King's Avatar
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    Quote Originally Posted by AUDI TURBO View Post
    LONG ONE IS INTO MY AIR INTAKE PIPE??? CAR DONE 98K???

    2007 A4 3.0tdi Quattro S-line, Lava Grey Pearl, 229+bhp, 6 speed manual, Cruise control, Auto wipers/lights, Parking sensors all round, RNS-E Sat Nav, Heated Volterra leather, Adaptive Bi-Xenon plus headlights, Bluetooth phone prep/voice control, DRL, i-Pod dock, Coming home lights, A4 B5 front spring seat mod, LED DRL/side light/numberplate lights, Window tints, Cupra R front splitter, Black front grill, 3.5" custom tail pipes, 8.5x19 Calibre Excalibre wheels running 225/40/19, ET30-R ET35-F.

  17. #16
    AUDI TURBO's Avatar
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    is that a pic of n75J it or orginal......... im assuming the pipes exactly the same just you obviously have to extend the turbo pipe and alter postion of the wire that goes to it.
    Modified primera :-)

  18. #17
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    Ahh, so do S4's have these too?

    I've replaced the MAF for a fresh one, just ordered my 710N's (as a matter of course really),......so is it worth me getting this N75 valve aswell?

  19. #18
    AUDI TURBO's Avatar
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    yes they do im sure. personally i dont recomend 710N if you getting remap etc the 710n worked fine on my stock a4 but after remap and extra work it couldnt cope plus the uprated ones look and sound great
    Modified primera :-)

  20. #19
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    Quote Originally Posted by AUDI TURBO View Post
    personally i dont recomend 710N if you getting remap etc the 710n worked fine on my stock a4 but after remap and extra work it couldnt cope plus the uprated ones look and sound great
    This S4 was mappd by AMD when new lol

    It's done 91K now, and presumably it's on the original (possibly tired) 710's.

  21. #20
    Jimbo.King's Avatar
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    Its a pic of N75J, you wont have to extend the turbo pipe, just extend the wiring.
    Quote Originally Posted by AUDI TURBO View Post
    is that a pic of n75J it or orginal......... im assuming the pipes exactly the same just you obviously have to extend the turbo pipe and alter postion of the wire that goes to it.

    2007 A4 3.0tdi Quattro S-line, Lava Grey Pearl, 229+bhp, 6 speed manual, Cruise control, Auto wipers/lights, Parking sensors all round, RNS-E Sat Nav, Heated Volterra leather, Adaptive Bi-Xenon plus headlights, Bluetooth phone prep/voice control, DRL, i-Pod dock, Coming home lights, A4 B5 front spring seat mod, LED DRL/side light/numberplate lights, Window tints, Cupra R front splitter, Black front grill, 3.5" custom tail pipes, 8.5x19 Calibre Excalibre wheels running 225/40/19, ET30-R ET35-F.

  22. #21
    mattfinn's Avatar
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    Quote Originally Posted by Dan Gliballs View Post
    This S4 was mappd by AMD when new lol

    It's done 91K now, and presumably it's on the original (possibly tired) 710's.
    One of the first jobs I did when gettin my S4 was new 710's, N75, Tbb etc, and it ran soooo much better! Proper sings at full chat, and sounds like a jet on take off, love it!
    8P S3 S-Tronic BE. Stage 2 from Awesome GTi.

    Gone - S4 bi-turbo - forever a place in my heart!


  23. #22
    AUDI TURBO's Avatar
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    well the way ifitted it i had to extend my turbo pipe orginal pipe woudnt reach as the tube off the n75j was facing towrds headlights if taht makes sense. anyway it doesnt matter it on and just update it now running fine i think car jsut had to learn new setting because now it is real fast. made big differnce seems more power through rev range........wont be doing that though at momentr with a flat tyre!!!!!!!11
    Modified primera :-)

  24. #23
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    Quote Originally Posted by mattfinn View Post
    One of the first jobs I did when gettin my S4 was new 710's, N75, Tbb etc, and it ran soooo much better! Proper sings at full chat, and sounds like a jet on take off, love it!
    A Tbb?

    Yeah, I hope these things will make things even perkier

    The new MAF made a much bigger difference than I was expecting.

    How much are these N75's? They're a standard replacement item right?

  25. #24
    AUDI TURBO's Avatar
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    I got mine for 43.00 inc del and vat from vwperformance
    Modified primera :-)

  26. #25
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    Is this mod (N75J) for the s4 as well as the 1.8T?

  27. #26
    AUDI TURBO's Avatar
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    yes vfor 1.8turbo thats what ive got
    Modified primera :-)

  28. #27
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    Are there s4 guys with this (n75j) fitted?
    I had a look round and it seems worth a try for 1.8T, but at a risk it triggers limp mode.
    But is it originally for for a 225hp TT ? if so is it a down grade for the s4?
    Can't decisde if I should give one a try or not?

  29. #28
    hiltoa's Avatar
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    The n75j is originally from the S2 - not an up (or down) grade as such, just a more agressive profile. Mine made a difference at first, but the ECU seems to have adjusted out the 'edge' it had.
    Nothing feels fast for long...

    2004 Audi Allroad 2.5 TDI L.E.
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    Tornado rot.

  30. #29
    smitch's Avatar
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    I stuck one on my 1.8T along with a K&N filter and it definitely sharpened things up a bit after it was chipped and i'm sure it made more of a whistling noise from the turbo as well.
    S4.

  31. #30
    smitch's Avatar
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    Thinking about it, it was the Bailey DV that made the whistling noise.....
    S4.

 

 

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