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Thread: Can you use OBD-II to dyno your car?

  1. #21
    Variable Bitrate Bailey's Avatar
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    That's interesting. I forgot about the G-tech. So when your product is installed in a mobile PC hooked up via OBD-II, your product claims to be as accurate as this G-tech stand-alone device? If so, you got me sold.

  2. #22
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    Quote Originally Posted by Bailey
    That's interesting. I forgot about the G-tech. So when your product is installed in a mobile PC hooked up via OBD-II, your product claims to be as accurate as this G-tech stand-alone device? If so, you got me sold.
    Baily,
    I can definitely say that ProScan is much easier and more reliable than the G-Tech... by FAR. I paid $350 for the G-Tech competition when it first came out a few years back. Looked really impressive sitting in the dash, but the results were lousy.

    The G-Tech uses accelerometers to calculate horsepower and torque and even the 1/4 mile stats. It also "senses" the RPM... how... I'm not exactly sure. The only connector is a cigarette power adapter.

    I spent an entire night one time readjusting the dang thing to try to get it perfectly level, etc... but the results were NEVER accurate. The 1/4 mile time would vary by 5 seconds or more, horsepower and torque wouldn't even show up half the time, and when it did it was way off and never the same curves or peak values! The only good thing I have to say about the G-Tech is that I resold it on ebay for a few bucks more than what I paid for it. The product sucks, but they really know how to market it.

    ProScan uses the same input variables in its performance calculation (acceleration, RPM, vehicle weight, tire size, etc). BUT, ProScan can accurately determine the vehicle's acceleration AND RPM... without having to worry about perfect levelness, RPM sensing, etc, etc.

    The 1/4 stats in ProScan are reliable everytime as long as you don't have excessive wheelspin.

    The dyno section has its quirks (see my first post in this thread) but it is much more reliable than the G-Tech and any other acceleration-based dyno tool.

    Plus, ProScan is a top notch diagnostic tool as well. So for a hundred bucks you definitely get a LOT for your money with ProScan.

    Oh, and anyone ordering during the month of March, 2005, I'll refund $5.00 of your purchase price if you put a note with your payment specifying "MP3Car.com"!

    Thanks!
    David Gore
    Owner, Gore Research
    Developer of ProScan
    http://www.MyScanTool.com

  3. #23
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    How accurate will the an ODBII dyno or drag strip test thing be if your speedometer is off due to different sized tires or regeared axles?

  4. #24
    Variable Bitrate BiohazrD's Avatar
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    Quote Originally Posted by System-f
    How accurate will the an ODBII dyno or drag strip test thing be if your speedometer is off due to different sized tires or regeared axles?
    Quick! To the Popemobile!

  5. #25
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    Quote Originally Posted by System-f
    How accurate will the an ODBII dyno or drag strip test thing be if your speedometer is off due to different sized tires or regeared axles?
    Currently, the calculations will be off if the speedometer is not accurate.

    However, the values could still be used relatively for tuning purposes... the numbers just wouldn't match up with track timeslips.

    I'll think about incorporating a speedo adjustment factor into the software to adjust for incorrect speedos...

    Thanks!

  6. #26
    Newbie Johny_Dough's Avatar
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    ProScan...How does your product compare to Ecutech DeltaDash?
    I must keep my anonimity

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