Crank & Power sterring underdrive pulley upgrade
www.cheetahonline.com
They sell two pulleys for 986. $100 & $200. Sounds good for the 10 + HP & no check engine light. I figured while you have the compartment opened up, might as well cahnge both. Anyone tried this? Sounds like a win/win situation with no down side. Thanks Rich |
Underdriving the crank will underdrive ALL accessories, including the PS pump obviously, so also underdriving the PS pulley may be too much.....
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Why would it be to much on the power steering side with booth pulleys. Seems like the total rotational mass loss would be good for everything?
Thanks |
Oops! A smaller pulley on the PS pump will turn it FASTER, killing the PS pump faster. Maybe not a good plan.
Last I heard Cheetah was not returning calls/emails from customers. Buyer beware! http://986forum.com/forums/boxster-general-discussions/25437-issues-buying-cheetah-online.html?highlight=cheetah http://986forum.com/forums/boxster-cayman-parts-sale-wanted/24996-dmes-sale.html?highlight=cheetah |
The "underdrive" ps pump pulley is larger than stock in diameter...
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Quote:
"Also, these pulleys are made with a smaller diameter than the stock pulley. This rotates the belt driven accessories at a slightly slower pace (around 10-13% slower). Since each accessory takes power to turn, hp and torque are regained through the "underdriving" process also." |
Yeah, that text part is probably supposed to just refer to the crank pulley. The ps pulley description refers to a larger _belt_ diameter, whatever that may mean... probably a typo as well...
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