A centerforce was one of the ones I burned up but it worked fine until it started slipping. My inquiry here is about dual DISC clutches, not dual friction single disc clutches.

I would call ProMotion Peformance Products.  954-771-5575

My last 3 clutches have come from them and they are all better than Centerforce or McLeod.  There's something about the cable style operation to where I was never happy with  Centerforce in particular.  I used them for decades on mechanical linkage clutches and they worked awesome, but they seem to be junk on the cable cars.

ProMotion builds their own clutches to your specs.  The one for my '89GT was less than $400 shipped.  They have a website, but they're kind of old school, so I learned to just call them and order over the phone. 
 

0 right now, but I've got over 20k on the one in my IROC and my buddy has at least that if not more on the one in his Cobra. 

Well Steve, if I can break it, I will. 
I been using the same setup as yours now for many years. What I did fine is you can't use the (by the Ford book instructions) because it's not the (by the book clutch).  It needs more room because of the weights. Some for the finger start to lean against the TO bearing when you are being naughty.
I still use the Z bar.
Besides you can't crank your 427 like an ole skool Cleveland. 

2nd on Southbend.

Had one in my old Cummins powered pickup.  Might try giving them a call.  What they sold me was very street friendly and held up to 800 foot pounds of torque without issue.

Can’t comment on mustang applications, I have a Sonnax torque converter…

MS wrote:

My 66 has a 427 stroker with a TKO600 tranny having 26 spline input shaft. I have destroyed three clutches of notable brand name and high quality in about 15,000 miles.

MS - just curious, any ideas of why these clutches are not lasting more than 15,000 miles?

 

Dan - I’m guessing the picture represents a “heavy” foot!
I realize driving style, as well as shorter rides (requiring more clutch use) or highway driving, has a lot to do with clutch wear and was just wondering what MS attributes his lack of long life of his clutches.

One of the truck sites I visited said that the dual disc setups were pretty hard to drive smoothly...like around town.  Apparently they hook up very quickly with little slip-in when pulling away.

 

I had misquoted the miles on my engine. After driving it today, I realized it has 26,000 miles on the engine. More than 20,000 of that was with a Centerforce dual friction clutch.
The mcLeod has just bern junk for the last part of that.
The Centerforce was always very smooth. It just started to slip, so I took it out.

Last edited by MS (5/08/2022 11:38 AM)

I admit I don't know much about performance clutches.   But I do know there is a racing clutch manufacturer in my neck of the country that has made a name for itself in racing circles. 

Ace clutches.   (note no direct link!)

I suggest at least looking at their website they seem to offer what you are looking for.   With the bonus its all American developed and made.   I believe the Gateway Mustang guys use them in their coyote conversions.

My 2017 GT350 had a dual disc clutch. It was smooth as butter, with very minimal leg effort.

I believe they use lighter springs with more surface area to accomplish an easy pedal and smooth engagement. 

I am hearing otherwise on here. But, is this from your direct experience, or what you heard on VMF?

Agreed, but I think MS's point is also valid.  Just like there are racing single disc clutches there are also racing twin disc clutches.  Racing clutches are typically too aggressive for street use.  That said, there are street friendly versions of both.  That said, the twin discs are going to be pricey (cheap setups are $700-$1,000).  From what I've seen most guys have no issues with a proper single disc clutch for the street.  Twin discs start to be attractive in the 700-750HP range, which is beyond what most street engines are making.