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Crank or RW HP?

  1. 11-18-02, 09:49 AM #1
    ShredHed
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    Question Crank or RW HP?


    HP specs are commonly published in two flavors: Crank and Rear Wheel.

    I'm assuming RW comes from the dyno, how is Crank tested?

    Can you extrapolate one from the other?

    Some manufacturers like to publish Crank HP, probably b/c it's higher...

    Thanks,
    -Jack

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  2. 11-18-02, 10:14 AM #2
    Stoneman
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    Crank or RW HP?

    Can't say for certain, but I thought they got the crank HP when they 'bench test' 'em...

    Mark?

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  3. 11-18-02, 10:22 AM #3
    Stoneman
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    Crank or RW HP?

    of course, like everything else.. I could be talkin' out my ass
    ....very likely....

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  4. 11-18-02, 10:34 AM #4
    Degsy
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    Crank or RW HP?

    BHP= Brake horse power

    The power it takes to "brake" a flywheel "drum" of a certain size and weight at a certain speed, basically.

    degs

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  5. 11-18-02, 10:37 AM #5
    Stoneman
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    Crank or RW HP?

    ...I rest my case....

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  6. 11-18-02, 10:38 AM #6
    Stoneman
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    Crank or RW HP?

    Originally posted by T-595 Greg
    like everything else.. I could be takin' it up my ass
    ???

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  7. 11-18-02, 11:01 AM #7
    Stoneman
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    Crank or RW HP?


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  8. 11-18-02, 12:11 PM #8
    ShredHed
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    Crank or RW HP?

    Originally posted by T-595 Greg
    of course, like everything else.. I could be takin' it up my ass
    Originally posted by Stoneman
    ???

    So THAT'S how you test Crank HP....

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  9. 11-18-02, 03:13 PM #9
    GuntherRC51
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    Crank or RW HP?

    By the way thats MY post. I have no idea why I was logged in that way!

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  10. 11-18-02, 03:19 PM #10
    Stoneman
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    Crank or RW HP?

    Originally posted by GuntherRC51
    By the way thats MY post. I have no idea why I was logged in that way!
    Your log in is case sensitive...

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  11. 11-18-02, 03:24 PM #11
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    Crank or RW HP?

    Originally posted by Stoneman
    Your log in is case sensitive...
    Nope. Only the password is case sensitive.

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  12. 11-18-02, 03:25 PM #12
    Stoneman
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    Crank or RW HP?

    Originally posted by JC
    Nope. Only the password is case sensitive.
    That's what I get for thinking....

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  13. 11-18-02, 03:25 PM #13
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    Crank or RW HP?

    And in these days of legalities and all that other bullshit...to claim '125hp engine' you have to show the ENGINE's horsepower, not what gets to the wheel after it gets through the drivetrain to the ground.

    Plus, 125 sounds much more bad ass than 105.

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  14. 11-18-02, 03:27 PM #14
    Stoneman
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    Crank or RW HP?


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  15. 11-18-02, 06:30 PM #15
    TLRMan
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    Crank or RW HP?

    Originally posted by Degsy
    BHP= Brake horse power

    The power it takes to "brake" a flywheel "drum" of a certain size and weight at a certain speed, basically.

    degs
    See...
    You didn't need me!
    I was busy workin' anyway....

    So..what's the difference between an inertial dyno versus an eddy current dyno?

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  16. 11-18-02, 10:53 PM #16
    ShredHed
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    Crank or RW HP?

    Originally posted by TLRMan
    So..what's the difference between an inertial dyno versus an eddy current dyno?
    Eddy current helps your dyno, unless of course it "helps" you into a keeper-hole.

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    Last edited by ShredHed; 11-19-02 at 10:16 AM.
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  17. 11-19-02, 01:07 AM #17
    Kham
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    Crank or RW HP?

    Originally posted by TLRMan
    See...
    You didn't need me!
    I was busy workin' anyway....

    So..what's the difference between an inertial dyno versus an eddy current dyno?
    inertial dyno

    a system that measures work (Torque/Horsepower) based on the acceleration of an object of a known mass.

    and eddy current dyno has something to do with measuring braking power?

    haha search engine, how wonderful.

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  18. 11-19-02, 03:48 PM #18
    SWEET_Z
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    Crank or RW HP?

    Originally posted by ShredHed
    So THAT'S how you test Crank HP....
    You guys are too funny sometimes.

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