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    Thread: APR Stage 1 duly cycle logs - CCTA Motor

    1. Junior Member
      Join Date
      Jun 25th, 2011
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      2008 Audi A3
      12-03-2011 12:54 PM #1
      Hello,

      I just got the APR Stage 1 tune, and my first impressions are great. The car went from "oh thats pretty quick" to "okay, now I have to pay attention to what I'm doing" A HUGE difference in mid range torque.

      However...

      I'm not reaching requested boost levels, and my N75 Duty Cycle is pegged at 96% (minus a short dip at 3k RPM) I'm trying to figure out if I have a boost leak. BTW, I have Revision D DV Valve, everything else is stock

      Does anyone have some stage 1 logs with requested boost, actual boost, and N75 Duty cycle? It would be much appreciated.

      Link to my data logs (download then open with excel)
      Last edited by DavidA3; 12-03-2011 at 02:30 PM.

    2. Forum Sponsor Arin@APR's Avatar
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      12-04-2011 10:11 AM #2
      Looks like a leak. Request and actual should stay pretty close to being on top of each other. Duty cycle is usually much lower.
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    3. Junior Member
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      2008 Audi A3
      12-04-2011 10:10 PM #3
      Thanks for the info Arin. I'll post what I find to be the cause. I'm fairly certain the leak was there before the tune but there was enough headroom in the system to compensate. I was able to reach and maintain stock requested boost with 55-60% n75 duty cycle.

    4. Member John Y's Avatar
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      Old World: 2015 BMW X1. New World: 2015 GTI S, 93 Corrado SLC
      12-05-2011 03:59 PM #4
      So is that spread sheet consistent with a leak? You seem a little slow to build boost, and then actual bleeds off more rapidly requested, but for about 1400 rpm in the mid-range it seems to closely match requested, and you are maxing out at just over 17 psi - which I think is about right for an APR st. 1? Also, what is the deal with the N75 - should it be showing partial values even under full throttle?

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