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Standard map...

Discussion in 'A3/S3 Forum (8L Chassis)' started by ben4866, Dec 5, 2009.

  1. ben4866

    ben4866 Member

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    Can anyone confirm whether the boost on standard AGU should be so progressive, at 2k rpm I get 2psi... 3k around 4psi... 4k around 6psi ?

    The car feels really gutless but maybe thats how it should be in standard tune ?

    Ive tried a MBC and set it to 6psi and it totally trasforms the car, it gives it some torque low down hitting 6psi at 2k.

    I know I'm not talking about particularly large amounts of boost but just wondered if its how the standard cars are ?

    Any feedback greatly appreciated.
     
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  3. Westy

    Westy Well-Known Member

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    Standard boost should be around 12psi with a stage1 map usually taking it to the 20-21psi mark.
     
  4. Broken Byzan

    Broken Byzan Photographic Moderator
    Staff Member Moderator VCDS Map User quattro Audi A4

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    Westle, 12 PSI would be standard on a 180 model or an S3, .

    The AGU will be spiking MAX 8 PSI. You need to rememebr too that boost is load related. I bet if you stuck your car on a steep hill and tried again you would have full boost by 2500 rpm
     
  5. Westy

    Westy Well-Known Member

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    Ah yes sorry guys I missed that part! It's Sunday morning and I have a stinking cold, sitting here with toilet paper stuck up my nose!

    Like mark said though, boost is load related. You can try pulling away in 3rd gear for example (you'll need high revs) and it will put the engine under load and boost harder than pulling away in 1st. Or find a hill.:whistle2:
     
  6. ben4866

    ben4866 Member

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    Thanks for replies guys.
    I did test up a long hill, and as you say I would have expected full boost by roughly 2.5k but it just doesn't happen. I don't get to 6/7psi till about 4k.
    It really makes hills hard work.
    Any more ideas ?
    Thanks.
     
  7. badger5

    badger5 www.badger5.co.uk
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    maf
     
  8. Broken Byzan

    Broken Byzan Photographic Moderator
    Staff Member Moderator VCDS Map User quattro Audi A4

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    I see the man of many words is back amongst us. LMAO
     
  9. ianysm

    ianysm Active Member

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    Or N75?
     
  10. ben4866

    ben4866 Member

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    Brand new N75 fitted a few weeks ago.
    Ive logged MAf through VagCom and I'm getting around 80g/s max, I believe that's a little low and should be reading around 120g/s max on a standard AGU ?

    Thanks for replies.
     
  11. Welly

    Welly VX220 SC Driver :)

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    I'd second this, I had the EXACT same problem with my AGU (low boost) and Bill diagnosed it spot on.

    New MAF - New car!!
     
  12. ben4866

    ben4866 Member

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    Excellent.
    Cheers guys, will order a new MAF from the stealers.
    Hopefully economy will improve too with new one, can't get past 27mpg no matter how steady I drive.
     
  13. Welly

    Welly VX220 SC Driver :)

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    Also, if it's not the MAF - ban it straight on the Bay as brand new (since it will be pretty much) and make your hard earned spondoolies back!!
     

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