View Single Post
spuggy spuggy is offline
Registered User
 
Join Date: Jul 2003
Location: Glorious Pac NW
Posts: 2,744
Cool, thanks.

Brian, do you have a part # for the Sport clutch? Any specs? (I can probably get the latter with the part #'s...)

Is it a complete kit or an uprated plate? I'm told Sachs do a pressure plate they rate @ 350 ft/lbs, and I'm wondering if that's the same as you're referring to.

The power clutch had an original # (for the kit) of 3000961101, which apparently references or supercedes the following parts:

91511691100
91511600116
91511600127
91511601122

Must look up all the part #'s...

Jess, thanks for your reply too - I was told (by a competition clutch guy) that the 225mm Sachs 915 organic friction plate is rated (by Sachs) @ 600 NM, or about 442 ft/lbs. I was considering trick friction materials until I heard that...

Another competition clutch guy told me that all ratings quoted by Sachs have a 20-25% margin built in. (He was talking specifically about pressure plates in that instance, mind you - but seems like a fair bet it's across the board)...

KEP told me that their Stage 1 kit (which they rate @ 417 ft/lbs) uses the stock Sachs friction plate with their pressure plate.

One of the clutch guys I spoke to laughed when I mentioned the 930 motor and the Power Clutch, said "yeh, that won't work" and told me that the Power Clutch is a stock 915 pressure plate, and they just cherry pick the top 10% of the batch into the Power Clutch boxes (like Harley did for Cafe Racer motors in the 70's)... So there's apparently a pretty fair chance you could buy a stock Sachs clutch kit and end up with one with an identical rating to a Power Clutch...

Seems to me a pressure plate rated @ 350 ft/lbs with a 25% margin will hold up to 437 ft/lbs, which seem to be a good match for the stock friction plate.

I like off-the-shelf stuff, but I don't want to have to get a gym membership to change gear...
__________________
'77 S with '78 930 power and a few other things.

Last edited by spuggy; 07-22-2007 at 07:23 AM..
Old 07-22-2007, 07:20 AM
  Pelican Parts Technical Article Directory    Reply With Quote #4 (permalink)