Audi TT The Audi TT line, in both the coupe and roadster combines Audi's All Wheel Drive performance with the feel of a European sports car.

My TT's sagging :(

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  #1  
Old 10-23-2007, 04:55 PM
quattrocket's Avatar
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Default My TT's sagging :(

Well more like lagging...I had posted the issues I was having in an older thread about how my car went from super fast to crazy slow. Issues were fixed (or so I thought) so now I'm wondering what new and exciting problem I'm having with my s*!%head of a car. So here's the deal now...the car was really fast after I had a custom tune done to it. It became ultra slow, due to a bad hose (one going to the N75 valve). Hose was replaced, along with 4 brand new tires and an oil change. I picked the car up after the shop had closed and expected light speed again...However, this wasn't the case.

I called the shop, and they're telling me I'm getting 22psi, tapering off to 16psi just like the program says it should. So my question is this:
If I'm making 22psi, why does my car feel like it did when it was stock? Anything I can check at home? The clutch is good and the oil is fresh, so I'm stumped. Help please!!

2003 Audi TT 225Q
VTDA intake, Forge DV, Custom Tune
 
  #2  
Old 10-23-2007, 04:59 PM
WishIWasRWD's Avatar
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Default RE: My TT's sagging :(

Don't take their word for it, get a boost gauge and make sure you're boosting normally.

How are they checking your boost?

If you don't have a boost gauge I don't see how they are throwing numbers out at you.
 
  #3  
Old 10-23-2007, 05:09 PM
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Default RE: My TT's sagging :(

Or your car could have been chiped before you bought it. And they just charged you saying they chipped it for you.
 
  #4  
Old 10-23-2007, 05:27 PM
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Default RE: My TT's sagging :(

What program peaks at 22 and settles at 16?(I know its a custom tune, the question isrhetorical.)Dont most drop 1-2psi after peak?
 
  #5  
Old 10-23-2007, 06:44 PM
quattrocket's Avatar
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Default RE: My TT's sagging :(

They hooked it up to a boost gauge temporarily at the shop, which is where they get the numbers from. The car DEFINITELY wasnt tuned beforehand, right now the car feels a little tiny bit faster than stock, but I know it was tuned right because when I first got it back the car was a rocketship. Now, not so much...

They also had given me the dyno charts for both before the tune, and after, so it was at one point, making good power.
 
  #6  
Old 10-23-2007, 06:54 PM
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Default RE: My TT's sagging :(

Boost sounds about right for a stock turbo. if it is slower than before, timing is the only other source for powerloss. Adaptation could be taking over and pulling timing. But thats just a guess.
 
  #7  
Old 10-23-2007, 07:00 PM
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Default RE: My TT's sagging :(

Try adjusting timing using Lemmiwinks. A throttle adaptation can't hurt either.
 
  #8  
Old 10-23-2007, 07:03 PM
cincyTT's Avatar
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Default RE: My TT's sagging :(

we know he doesnt have a boost gauge, whats the odds of him having a vag cable? 0-10% Better have a buddy with one. The ME7 isnt a end user ecu, i wish people would get that.
 
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