Quote:
Originally Posted by Christ
If you're putting on larger pulleys, you're increasing the angular momentum that the pulley carries, making it more difficult to turn because of increased weight further from the center, and because of increased drive ratio.
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That is a poor blanket statement to make. And considering most aftermarket overdrive pulleys are aluminum, they are already significantly lighter than the stock pulleys they are replacing... and at approximately a 10% size increase, this increased angular momentum GENERALLY does not come close to offsetting the weight savings of an aluminum pulley.