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DYNO Help

Discussion in 'TT/TT-S/TT-RS Forum' started by Krissrock, Aug 30, 2005.

  1. Krissrock
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    Krissrock New Member

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    Listen guys,... i had my car dyno'd this weekend. It's a 225 QR with a ECS H valve, P-Flo intake, and Forge DV. That's it. THere was something weird goin on with the wheels. The wheels were kinda getting on the power by themselves. Here is a graph of the Total HP and Torque. [​IMG]
    Now, note the spikes in the torque and HP. The operator asked if i was letting off the gas...I wasn't. Now look at the torqe and Hp of just he Rear wheels. [​IMG]
    Why the spikes...? if i were to to show the RPM's as the dyno was running, when rear wheels would kick in, it would slow the RPM's for a sec...then speed up. Now check out the speed of both wheels...[​IMG]
    (RED is Rear - Green is Front) Seems as though the rear do a second by themselves, and the front coast......Any thoughts? and the engine was kinda hot...before my runs. Again, any thoughts? would a chip clear this up, or did my dealer mess something up when they changed the Haldex oil and filter last month?
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  2. dickys3
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    dickys3 Moderator Staff Member Moderator

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    The dips will be the haldex system working when the wheels are loosing traction on the rolling road. Perfectly normal...
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  3. scoTTy
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    scoTTy Active Member

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    Absolutely normal. I'd ask the dyno operator if he's ever down a Haldex car before or even know what one is.

    It's also strange that you was driving the car and not the operator.

    All plain weird.
    #3

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