Crank & Power sterring underdrive pulley upgrade

[RDS911]

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

[Cloudsurfer]

Underdriving the crank will underdrive ALL accessories, including the PS pump obviously, so also underdriving the PS pulley may be too much.....

[RDS911]

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

[Topless]

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!
issues buying from Cheetah Online
DME's for sale

[Fluellen]

The "underdrive" ps pump pulley is larger than stock in diameter...

[Topless]

Originally Posted by Fluellen

The "underdrive" ps pump pulley is larger than stock in diameter...

Hmmmm, I wonder why they put this in their ad then:

"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."

[Fluellen]

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...