Re: RE:Matt/Jay/power steering discussion

[stover@xxxxxxxxxxxx]

So, if power assist is the name of the game then big pulley- small swept
volume would be the best combo for reducing parasitic loss. Yes?
Steve Avery

Date: Wednesday, May 4, 2005 08:03 PM
From: Tom Jennings <tomj@xxxxxxx>

>>  Does the larger diameter of the pwr strng pump assembly equate to being
>> underdriven compared to the Eaton set-up? Does it use less hp to drive
>> the Saginaw assembly with the larger diameter pulley??

The vane type has a larger swept volume; low RPM moves a lot of
fluid; big driven pulley rotates slower.  The roller type doesn't
move so much per rev, so more RPMs; little driven pulley rotates
faster.