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    1 of 7
    Yermo
    10 years ago
    Map of today's GPS tracks:

    2 of 7
    buffalo
    10 years ago
    I'll be more than happy to live with 148.65 HP at the rear wheel :
    Photo #5941
    buffalo
    10 years ago
    K1300S Dynomometer Run

    K1300S Dynomometer Run

    From Bob's BMW open house, 4/27/13
    3 of 7
    rshaug
    10 years ago
    Yes indeed buffalo won at Dyno The lowly stock Ninja only managed 122. Looks like there's work to be done.
    4 of 7
    buffalo
    10 years ago
    However, the "lowly" Ninja has 300cc less engine displacement, and weighs less too. I haven't looked at specific specs, but I'm guessing if we did a HP to weight comparison, the Ninja would look much better than the K
    5 of 7
    rshaug
    10 years ago
    buffalo You got me thinking so I went back to the spec sheets and did the math

    K1300 - 0.11 HP/cc of displacement and 0.26 HP/lb (wet)
    N1K - 0.12 HP/cc of displacement and 0.25 HP/lb (wet)

    Turned out to be really interesting digging into the numbers a bit, no wonder the acceleration figures are so close until triple digits (where ultimate HP matters more than HP/lb). Acceleration being expressed using F=ma or a=F/m where either increasing Force or decreasing mass derives "faster" acceleration. Velocity is trickier because it's a vector with lots of variables (drag, friction, losses, et), for purposes of fun discussion though it can be boiled down to forces of drag increasing exponentially such that the power needed to move an object increases as the velocity cubed, and drag increases with the square of velocity. For terminal speed we are looking for the lowest drag (and other loss forces such as friction) and highest power.

    For all my dorky friends, check out this fun little spreadsheet: 
    https://docs.google.com/spreadsheet/ccc?key=0ApPRT4wdrO...

     
    6 of 7
    rshaug
    10 years ago
    (side note, the rear-wheel HP ratings in the MCN Performance Index were within 0.01 of the dyno run on the Ninja, but it looks like buffalo is down a couple of HP )
    It looks like jpcfjr did well for himself, mathematically, with the Speed Trip R. :-) 

    SpTR - 0.12 HP/cc of displacement and 0.25 HP/lb (wet)

    For comparison... 
    The new Aprilla RSV Factory 

    RSV - 0.17 HP/cc of displacement and a whopping 0.38 HP/lb (wet) ... no wonder it needs electronic driver aids
    7 of 7
    Yermo
    10 years ago
    Some photos from yesterdays trip to Bobs BMW and the ride afterwards:
    Photo #5959
    Yermo
    10 years ago
    Serious turnout.
    Photo #5964
    Yermo
    10 years ago
    Comfy
    Photo #5961
    Yermo
    10 years ago
    Bikes Everywhere
    Photo #5963
    Yermo
    10 years ago
    Oldschool R100GS
    Photo #5962
    Yermo
    10 years ago
    Rolling Antique
    Photo #5966
    Yermo
    10 years ago
    Drag Bike
    Photo #5968
    Yermo
    10 years ago
    Ducans new tail bag.