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  1. #1
    JUS3IN's Avatar
    silver sleeper

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    how will my s3 run with the n75 unplugged?

    he all just a quick one today, as some of you may know we have our first little one arriving mid january and the s3 is going to be our only car for the time being as we have sold the missus jimny today to raise some cash...

    anyhow, i have been contemplating disconnecting the n75 while the girlfriend has the car. hopefully this will make it a bit better on fuel and less liable to throw the baby around if she stabs the throttle a little hard... mainly for fuel reasons though...lol im tight!

    will the car run perfectly and adjust the fuelling down to run on the 6psi of boost or will it be running really rich and be pointless? if so ive toyed with the idea of adding a switch into the n75 wiring to the dash and having switchable in car boost?
    1999 apy s3, n249 delete, sai and n112 delete. bbs lm reps, s2000 filter, relentless v3 manifold, relentless downpipe and sports cat, scorpion cat back system, badger 5 v3 tip, bam rocker cover, push in coilpacks, toyosports fmic, amd remapped to 280.3 bhp and 263.9 lb/ft.

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  3. #2
    2nd Gear

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    It will run fine, the car will still know how much air is flowing and fuel accordingly. . . Switch is a good idea, a few people on the forum (including prawn) have wired one in. I actually have the switch here for mine! Just haven't got round to doing it yet. . . .


  4. #3
    Gops's Avatar
    6th gear @7000rpm

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    Unless she's completely unable to drive right, she should be ok.. I had bill include one map on actuator I call "mrs mode" Which was still 293bhp! But she'll never get on boost tbh.
    Quote Originally Posted by <tuffty/> View Post
    its either mapped or broken...

  5. #4
    Vex182's Avatar
    Guess what I drive...

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    I know mine is not that far from standard but my mrs drives it just fine as it is, likes others have said, she does not get on boost really lol.
    Silver 2002 Audi S3 225 (BAM) since March 2011.

    Mods: Badger5 2.2 TIP, Jetex filter, PCV delete, 710 DV, Standard N249 in use, R-Tech Stage 1 TiV Remap, Audi TT Pedals, Red Dogbone, Polybushed tie arms. All silicone boost pipes, Michelin PS3s, Red V6 coil packs, MK4 flat blade conversion, retrofited cruise control.
    Currently: 254bhp - 276lb/ft (174bhp/ton) as of 11/02/2013 On V-Power

  6. #5
    JUS3IN's Avatar
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    great thats good to hear, so do i just splice either one of the wires and run a wire to the dash to an on off switch or do i need to do both wires on a double switch if you know what i mean?

    a long while ago a friend of mine bought an evo 4 with a broken waste gate that was really good on fuel, when he got it repaired he sold it because it was too juicy lol...

    im interested to know the average mpg on low boost because im guessing even before you boost the map will start loading the fuel in to avoid running lean right?

    my missus does drive it, and she does fine but occasionally under estimates the power when she jumps from the 70bhp jimny to the 280bhp s3 lol, that scenario and a rear facing baby seat lol...

    what power does an s3 make with it un plugged??? 150bhp?
    Last edited by JUS3IN; 29th December 2013 at 15:09.
    1999 apy s3, n249 delete, sai and n112 delete. bbs lm reps, s2000 filter, relentless v3 manifold, relentless downpipe and sports cat, scorpion cat back system, badger 5 v3 tip, bam rocker cover, push in coilpacks, toyosports fmic, amd remapped to 280.3 bhp and 263.9 lb/ft.

  7. #6
    Reverse Gear

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    Has this question been answered yet as I also would like too know.

  8. #7
    Prawn's Avatar
    My other car is a MINI!!!!

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    Answer is in the thread Anthony, it's literally just a case of cutting one of the N75 feed wires, and extending the two ends to a switch, and that's literally all there is to it!
    -------------------------------------------------------------------------------------------------

    Prawns TFSI Turbo'd 1.8T Track Car

    But I know nothing so ignore me.

  9. #8
    Reverse Gear

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    Cheers prawn

  10. #9
    <tuffty/>'s Avatar
    Badger 5 Edition

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    Be aware that it will throw a fault code for the N75 but shouldn't turn on the CEL

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  11. #10
    Reverse Gear

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    My CEL light is on anyways lol (full s/s exhaust)

  12. #11
    JUS3IN's Avatar
    silver sleeper

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    lol thread from the dead!-)
    1999 apy s3, n249 delete, sai and n112 delete. bbs lm reps, s2000 filter, relentless v3 manifold, relentless downpipe and sports cat, scorpion cat back system, badger 5 v3 tip, bam rocker cover, push in coilpacks, toyosports fmic, amd remapped to 280.3 bhp and 263.9 lb/ft.

 

 

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