>No cuz the crank pulley is directly spinned off the drive train. The engine
>spins the crank pulley from the center of the pulley while the accessory
>pulleys are being spinned by the belts on the edge of the pulleys. Spinning
>a 10lb disc from the center requires much greater force than turning it by
>the edge. You would easily be able to spin that disc turning it on the edge
>with your pinky but if you were to use your pinky's force to spin it by
>turning a rod through the center axis, then it would be extremely heavy.
>Reducing weight on the crank is much more efficient than reducing weight on
>the accessory pulleys. Reducing a few ounces on the accessory pulleys
>theoretically shouldn't even help with 1/10 of a horsepower given that
>there
>is no underdriving involved. The UR Accessory pulleys are the same diameter
>as the stock so it should be useless. Just my thoughts. Mike K might be
>able
>to comment further on this.
Where you drive a pulley has no impact on how much power it will take to
spin the pulley up. It has no effect on the pulleys mass or mass
distribution.
The reason why a crank pulley mass reduction is more effective than the
other pulleys is because the crank spins faster than the drives which run at
a reduced ratio.
Mike
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