No complaints with my Valair kevlar/ceramic setup.

 

Is there an instance when a triple clutch would be the way to go? Lets say a 450hp at the wheel PSD 7.3

 

When should triple cluch come into play with lets say a 425 whp PSD

 

My Kevlar/ceramic can handle 500hp. The only thing I can't do with mine is sled pull.

 

Single or double?

 

Single....

 

Never. A dual sintered iron would be more clutch than you would ever need in that power range, even if you were sled pulling with it. A dual organic is plenty of clutch for that power range in a tow rig and it's pretty smooth engaging too. A triple ceramic is a good daily driving clutch for a hot street truck like mine that does some towing and even more drag racing.

To my knowledge nobody has fitted a triple disc in front of a ZF5 yet. There is barely enough room for the dual discs that we use now. To install one of these dual discs, you do have to grind down some of the webbing inside the bellhousing to gain enough clearance for the pressure plate. So putting another disc and floater plate in there would be tough.

A triple disc would come in handy for someone well over 500hp.. I've only been in a couple trucks with triple discs. None of them were Fords and I haven't driven any of them. From the little bit I've talked to Dan about triples, a ceramic triple is what they generally call the street triple. In the Dodge world, a triple ceramic is rated at 950hp and the one I've been in engaged really smooth. Has a similar sound to my dual disc also. I would bet that triple ceramic would be a really nice towing clutch really. It seemed a good deal smoother than my dual disc. You can also do a triple sintered iron and depending on the pressure plate you use it would be rated around 950-1300hp.

 

Thank you thank you!!!!! now I watched a vid on you tube on E4OD rebuild. Can you watch the vid and tell if this is a typical rebuild or something much more. http://youtu.be/4xQ6cpD4I1o

 

Holy heck...I started with a Valair dual ceramic and it simply was not even drivable on the street. I could not take off from a stop without the truck jumping and shaking violently no matter how much I tried to slip it.

I then switched to a Valair dual organic. It was better on take off, still shook violently from a stop (1st gear). I then swapped my S42 to a S47 trans and with the different gear ratio the truck is finally driveable. I cannot start in 2nd gear most of the time, truck will still lurch and shake violently. And my pedal engages about 2/3 of the way up and it's getting really annoying.

We've installed South Bend dual disks that are super quiet and totally effortless to drive with. I'd have to say it's a much nicer clutch.

 

I am putting a Southbend Street Dual disc in right now. No bell housing modifications required.

 

How many miles on that dual disc Jim?

I have no dual disk experience but when my clutch finally broke in it was a sudden thing and a night and day difference.

 

I don't understand why you had those problems. My clutch has been awesome. IMO the perfect daily driving clutch for a 500+HP truck that does some towing and I can shift it fast enough to only lose 5-10psi of boost in my shifts. You really can barely feel any vibration at all if you drive it right.

Cody's organic dual disc is also a very nice driving clutch. For sub 500hp, this is what I would have. Hell even his sintered iron is surprisingly smooth. I'll never have another single disc unless I have to for budget reasons.

 

I went with a Luke single.

96 f250 7.3 225000 miles