It seems that Centerforce has changed their design on the 11 inch disc. Here is a comparison, the old one is on the left. The flywheel side now has full friction material. Both parts had the same partnumber. (384148)

On the pressure plate side, the new clutch has .130 of friction material and the old clutch (with lots of wear) was down to .125.

On the flywheel side, the new clutch has .130 of friction material and the old clutch was down to .048.

As you can tell, the wear was concentrated on the flywheel side almost exclusively. As a result, the clutch was slipping under power. I imagine with that much material gone, the pressure plate pressure would have been lighter than with the full thickness clamped in there.

Anyway, with full friction material on both sides, the clutch should wear less and at least more evenly.

By the way, I don't think this clutch ever would have worn out, BUT, when I had it out and on the shelf one time, I sat the powersteering pump on it. Days later, the fluid had flooded over the clutch. I washed it down, but in stupidity, I used a petrolium based cleaner... I had it back in the car before I realized the mistake. I tried to clean it with brake cleaner, but I think it was perminantly affected.

 

Is this the DF clutch?

 

Yep (Both are dual friction)

 

OK...I just received my new CF DF clutch for a T-5 and it looks like the one on the left (except brand new). Why doesn't the flywheel side have full material?

This irritates me and leaves wondering if I should call Centerforce and ask for the "new model"

Anyone have any other info on this new clutch setup?

 

Flywheel Side

 

Pressure Plate Side

 

I would suggest you ask, I don't see how anyone can argue that the clutch with lesser material is better (rotating mass can't be that much difference )
The only thing I can think of is, when I got my first clutch disc, the one that only has half the friction material, it came in the clutch+pressure plate kit. When I ordered the disc separately, it came with full material. I just assumed that they had changed *all* of the discs over to the full material style.

 

Yeah, I ordered the kit and that was my concern too. I wonder if I order the clutch disc itself, which one I would have gotten...

Is there anyone else out there who has gotten the t-5 CF DF lately?

I will follow up with this...

 

it was my understanding that you couldnt get the DF disc WITHOUT the pressure plate...only the CF2 disc could be bought sepretly

 

This is a pic from the Centerforce website...so this is supposed to be fine? Why isn't there full friction material on both sides, instead of just the pressure plate side?

 

i'm not exactly sure why the flywheel side doesn't have full material but i can offer a few theories. the flywheel side is sinthered mettalic. if it were ful coverage there would be no room for expansion as heat levels rose. perhaps the metallic requires a certain amount of lbs per sq in loading to work. if you increase the surface area the square inch loading drops. most racing metalics use pucks instead of disks. maybe cf justimproved the material and can now use a full disk instead of the pucks. perhaps it is easier on the flywheel now.