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  1. #1
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    \"Dyno Butt\" test with VAG-COM on S3\'s

    Hmmm, not sure about how accurate this dyno test is using vag-com. But according to the tests measuring block 005 and 120. I am producing 333.8 (Nm) Net Torque, and 248 bhp at the wheel, with 221Lb-ft torque at the wheel.

    The Bhp figure doesn't sound right to me. I't was done using the weight of the car as 3355lb. (1525kg)

    I am running 21psi of boost, which thanks to my MBC is sustained for a lot longer than average.

    Does any1 else have vag-com and a chipped S3 they could do similar comparison.

    I've attached a plot of my actual boost vs requested boost for any1 that is interested also.

    Cheers

    Greg


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  3. #2
    Drill's Avatar
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    Re: \"Dyno Butt\" test with VAG-COM on S3\'s

    Hmm, your Torque sounds a bit low too dude [img]/ubbthreads/images/graemlins/confused.gif[/img] My A3 was dyno'd at 329 Nm after re-map. I would have thought the S3 gap would be more [img]/ubbthreads/images/graemlins/crazy.gif[/img]

    [img]/ubbthreads/images/graemlins/beerchug.gif[/img]

  4. #3
    RichA3Turbo's Avatar
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    Re: \"Dyno Butt\" test with VAG-COM on S3\'s

    Remember this is vag-com guesstimate!

    Rich

  5. #4
    robthehungrymonkey's Avatar
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    Re:

    Doesn't an S3 weigh 1375kg? Could be wrong.

  6. #5
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    Re:

    Im going to get some better logs, the road I was doing the tests on wasn't completely flat, and very twisty :-/


  7. #6
    AL_B's Avatar
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    Re: \"Dyno Butt\" test with VAG-COM on S3\'s

    [ QUOTE ]
    Robthehungrymonkey said:
    Doesn't an S3 weigh 1375kg? Could be wrong.

    [/ QUOTE ]

    The pre-facelift models quoted weight is 1375kg.
    The facelift models weigh a little bit more, about 1460kg.

    See this post...

    S3 Weight

    AL

  8. #7
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    Re:

    Yeah, so the weight I used was about right considering there were 2 of us in the car too.

  9. #8
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    Re: \"Dyno Butt\" test with VAG-COM on S3\'s

    S3's are right lard arses! My A3 weighs 1246kg. Will be removing the spare wheel, rear seats and sub .etc for the upcoming trackday... should be pretty bloody rapid with 300lb/ft [img]/ubbthreads/images/graemlins/grin.gif[/img]

    VAG-COM wont be to accurate anyway... Probably doesnt account for transmission losses .etc at the wheels.

    Rich

  10. #9
    AL_B's Avatar
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    Re: \"Dyno Butt\" test with VAG-COM on S3\'s

    [ QUOTE ]
    RichA3Turbo said:
    S3's are right lard arses!

    [/ QUOTE ]

    Yep, fat as fook! [img]/ubbthreads/images/graemlins/smile.gif[/img]


    AL

  11. #10
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    Re:

    The VAG-COM dyno is supposed to be pretty accurate, on some other forums, they compared vag-com results with actual dyno results and they were accurate within a couple of BHP.

  12. #11
    AndybS3's Avatar
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    Re:

    Wouldn't the coast down part of the butt dyno account for transmission losses?

    I think I've read somewhere that the ecu or Vag-Com can only read upto just over 1.5bar is this correct?

  13. #12
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    Re:

    The coast bit is supposed to do the "drag" part of the equations.

    Not sure about max boost readings on vag-com.

  14. #13
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    Re:

    1.5 bar is the maximum (or maybe 1.55)

    Dunc

  15. #14
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    Re:

    Ok, off and on it has taken me all day to get some figures from the data I logged last night, I'm still learning vag-com, but this is a dyno plot of the at the wheel power figures of my S3.

    I have no where near enough info logged, so will be redoing it this weekend and need to tweak the vag-com to log faster than it does currently.

    ANyway....I'll shut up....what do you think of this dyno? does it look right considering the data that I have collected?




 

 

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