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what rpm does your turbo spool up on a 1.8T 190bhp?

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by Beef, Nov 14, 2008.

  1. Beef
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    Beef Member

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    [Nov 14, 2008]
    Hi,

    I've just had both N75 valves replaced (whilst doing the cambelt) to see if it improves the power, but it doesn't seem to have helped much.

    Mine's flat until approx 2300rpm when you can feel the turbo kicking in. Is this normal?

    The car's a 1.8T quattro 2004 with the BEX 190 bhp engine. 75,000 on the clock.

    Many thanks in advance,


    Beef
    #1
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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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    [Nov 14, 2008]
    sounds about right to me. Its not a TDI... below about 3k i wouldnt expect it to do very much.
    #2
  4. evilscotsman
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    evilscotsman Space Cowboy

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    [Nov 14, 2008]
    mine starts to bite at 1800 rpm and pulls hard from 2k exactly, pulling even harder from 3500 onward.

    Maybe you have a small boost leak or a weak dv. There is only one N75 boost control valve, the other is a 710 diverter valve mate, totally different and do different jobs :)
    #3
  5. bubstar
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    bubstar Member

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    [Nov 14, 2008]
    X2 I'm with the Evil one :thumbsup:

    Even with my remap it's spooling by 1800rpm and pulling hard from 2k :racer:
    #4
  6. Beef
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    Beef Member

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    [Nov 17, 2008]
    Many thanks for the reply, you've given me some hope. Do you know where the boost valve and the diverter live on one of these engines?..I think I've had something completely different replaced (of which there were two).

    Thanks again,


    Beef
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  7. justintime1026
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    justintime1026 New Member

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    [Nov 17, 2008]
    i'm with the 1.8T quattro as well.
    turbo kick in at ard 2400 rpm, should be normal.
    although i havent done anything on my car yet.
    #6
  8. evilscotsman
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    evilscotsman Space Cowboy

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    [Nov 17, 2008]
    the n75 boost control valve is somewhere near the front of the engine and connects to the DV which is down below the drivers headlight area, only accessible easily from underneath.

    Check vagparts for a picture of both N75 and N710 (DV) so you know what they look like.

    :)
    #7
  9. Beef
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    Beef Member

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    [Nov 17, 2008]
    Thanks for that, Vagparts is a handy site. I've definately had the N75 replaced, it's just Audi call it a solenoid change-over valve. The DV I have not and will now try. I'm sure when I bought the car the turbo kicked in just before 2000rpm, where it is at the moment it's just too sluggish. Thanks again.
    #8
  10. bubstar
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    bubstar Member

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    [Nov 17, 2008]

    The DV is under the right intercooler on a 190 1.8T...............
    [​IMG]

    The N75 is fitted into the rubber turbo intake pipe at the top.

    Here's a pic of my alloy Oettinger intake, you can see the N75 in the middle
    [​IMG]

    BUB
    #9
  11. quattrojames
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    quattrojames Moderator Staff Member Moderator

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    [Nov 17, 2008]
    Bub your subframe is filthy! Show some pride man :tumble:
    #10
  12. bubstar
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    bubstar Member

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    [Nov 17, 2008]
    Sorry James, it was a 'before' photo! :blush:

    :laugh:
    #11
  13. quattrojames
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    quattrojames Moderator Staff Member Moderator

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  14. J7USS
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    J7USS Shuddup Foooool!!

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    [Nov 17, 2008]
    Shocking!!:whistle2:
    #13
  15. Beef
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    Beef Member

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    [Nov 18, 2008]
    Brilliant, very many thanks indeed.

    Beef
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