I would like a single plate clutch rated to 360 ft*lbs of torque. AP Racing is reportedly making a twin plate organic (similar to the sti 22b clutch) that I would be interested in. My concern with twin plates is they tend to wear out when driven on the street.

Erik

 

Thanks Mark - good explanation. The other thong a twin disk brings to the table (which Mark touched on) is the fact that there is twice the surface area "biting" for you, which obviously makes it grab much better.

Don't get me wrong, the twin disk is very driveable, as are the single disk units, but they are not at all like a stock clutch. Yes they can be slipped, but yes, they are much grabbier than stock (nothing you can really do about that, as its a function of the disk design/materials and the pressure plate.

Again, to avoid confusion, the HKS, Cusco, PE are all Exedy clutches, just rebadged and different colors.

The rating on the Exedy Hyper Single (single plate, sprung hub, 6 puck cerametallic disk) is 2645 lbs, so will easily handle 360 pound/feet of torque, and comes with an integrated flywheel as well.

Adam

 

well put !

 

So what is the stock clamp force?

 

Z1 , what is the price on you twin disc clutch.

Yes I would like a new flywheel and bearings please. Will that price include s and h? thank you

 

I am not sure what the clamp load of the stock clutch is.....most often stock clutches on performance oriented cars (especially 4 cylinders) clamp at around 1800 lbs, give or take.

Newevo8 - would love to help you but the Twin Disks are all on backorder right now till first week of July


Adam

 

Erik,

From Dirk at ACT (who has my stock clutch from the E7) stated that the stock clutch has a clamp force around 2600. The clutch on the E8 was about 2100. He also said that the E7 and E8 are slightly different, but the aftermarket clutches will interchange. He does not know why mine went out so quickly, but then again, he knows how I drive. I have the Exedy Twin plate in mine now but cant tell you how it feels (dah) since I dont have the car to drive .
I know Buschur is using a Exedy Twin plate in ther E8. So, I would call them and ask how it feels on the street.

 

Yeah I have heard that the clamp force on the VII is around 2600. So the 2645 is not that much of an improvement. I'm not looking for a 700 hp clutch just a 400hp (370ft*lb) clutch that is drivable.

Unlike you Mr. Brandt, mine will probably never seen a drag strip. Good to hear from you again.

Erik

 

so all evo vii aftermarket clutches will work in the evo viii ? its the same with suspension parts as well from my understanding !

 

Other options we have for a single disk include ORC 409 , CUSCO single disk and Power Enterprise racing single disk.

 

I know its a bit OT but is it bad to launch the car over 3000 rmp?

 

Bad for what? The clutch, tranny, tires, etc.?
I'm not trying to be funny but there is a difference. Launching will always wear something. Preferably clutch or tires, but with AWD and Advans, it's pretty much clutch or nothing.
If you hold at 3k rpm and sidestep the clutch, it's bad for the drivetrain. Don't do that. Be smooth all the time (shifting, roll on the throttle and off, etc) since the EVO drivetrain doesn't have much damping anywhere to absorb that.
If you hold at 3k rpm and slip the clutch out progressively in one smooth motion, it isn't near as bad on the trans.

Mark
www.Quantum-Racing.com

 

Z1 thanks. PM me when they come in. I will be glad to purchase a clutch kit from you.