Opinions twin disc clutches

[Tachyon]

I'm getting fed up with my 1g AWD's clutch. I've been using an ACT 2900 with unsprung 6 and 4 pucks for the past few years. Long story short, they always seem to cause clutch drag when they get warm, and I then I'm not able to shift about 6000 RPM.

To this end, I've been thinking about picking up a twin disc setup. I've been leaning towards a Competition Clutch setup as I'd rather not dick around with a ring gear.

The one thing that has me slightly concerned is reading in a few places that twins are even easier to warp than a single? This is my one reservation about buying one as I tend to punish my clutch vs gearbox when launching.

Does anybody have any experience with excessive warping causing clutch drag and then syncro damage when using multi-disc clutches?

[Halon]

I'm sure you already know, but act redesigned their PP's and discs awhile ago. Thus if you happen to be using mismatched disc and PP's, they will likely drag at lower rpms. Just throwing that out there in case you didnt already know.

As for twin discs, I never ran one because I heard the harmonics they create are hard on the transmission. Which so is clutch drag, so pick your poison I guess.

[blageo23]

I have the quarter master twin. Only problem I have had is the bolts that hold the pressure plate together hit the fork. Bought a "modified" fork and still hit. Then took it apart and modified it myself and it still hit. Ended up buying new bolts and countersinking them. It's worked for me since. Never had an issue with shifting at higher rpm. But I don't beat too
Much on it.

[4seasons69]

As far I know Swifty never had any problems with the twin disk in my car. I haven't gotten to drive my car much so I can't really comment from my own experience with it. I know a lot of the twin disk clutch kits you have to modify the shift fork to make them work. I have the powertrain technology one and you do not need to modify the clutch fork to make it work

[TkrPerformance]

I have had a QM it worked great also had the bolt problem did the same thing mike did. I lasted 2 years of D.D. In the Evo. Just needed a rebuild. I ended up getting a HKS twin for free and have been using that now. I like it better than the QM, but it is only for a 7bolt and I don't know if it is made any more

[JET]

I have twin also with pretty low miles on it that I would be willing to part with. I really liked it, great engagement and much lighter than a 2900. Much easier than a single to slip properly at the track. This one has a handful of track passes on it at 360whp. It is a QM from Devo tuning. I also have a billet shift fork to go with it. It is still on the car right now, but it is not in running condition. PM me if you are insterested.

[Tachyon]

I'm sure you already know, but act redesigned their PP's and discs awhile ago. Thus if you happen to be using mismatched disc and PP's, they will likely drag at lower rpms. Just throwing that out there in case you didnt already know.

As for twin discs, I never ran one because I heard the harmonics they create are hard on the transmission. Which so is clutch drag, so pick your poison I guess.

Actually I did not know this. I have a PP that is probably pushing 8 years old, and use their new discs. Hmm.

Jack's transmissions seems to have a solution for the broken hub springs that the twins can cause. Being I am building a different gearbox for 2013, I might give 'em a try.

I don't mind replacing internal transmission parts, but I do get a bit flustered when you wind out 1st, but have to let your RPM settle to
about 5500 before it will go into 2nd. Hoping a twin would help with this.

Thanks for the information thus far everyone... I appreciate it.

JET, you have PM.

[Kracka]

Actually I did not know this. I have a PP that is probably pushing 8 years old, and use their new discs. Hmm.
Looks like you found the problem. ACT should have included a notice with the revised clutch discs to prevent issues like this from even occurring in the first place.

[Halon]

RRE actually sent me a new clutch disc for free when this was discovered. Props to them for being on top of things I thought.

[Goat Blower]

Depends on your driving style I guess. I had a QM one which had problems and I had it rebuilt with new disks. I never used it at the strip where it probably would've been the cat's ass, but I didn't like it on the street. I got tired of the noise and even though I got it sorted as good as possible, I got tired of the super light flywheel. If you're racing all the time, I'm sure it would be great, maybe I'm just getting old.