First, lol at title. Ok now we've all talked it to death, but it's been a few years. Just got another fresh tranny. TRE Jon swears by the Exedy single plate right, because he's after the longevity of the shaft. The Exedy twin that we all know and love seems to trash the input shafts a bit, which are getting harder and harder to find. MY driving style prefers the low release point of the MMO22 vs the mid-way release point of the single. I "could" adjust my driving style to suit but I noticed a drop in lap times due to the extra "wait" on the release point. My power levels are not like Bee's so I don't really need the Tilton's holding power. Is there a single out there that feels close to the twin this day in age, or are we stuck lol.

 

I've never had Jon tell me not to run the Exedy twin.

 

Ask lol. He goes into a ~hour long schpeal about how our clutches are undersized so the "industry" added torque by adding plates which put load on the shaft before it actually releases etc etc etc. I agree the size of our clutch is ....lacking in comparison to other cars of similar power we compete with.

 

What does Jon say about using the Exedy sprung disks and keeping the clutch restrictor? Should only really be able to damage the input shaft on impact loads mostly from launch but also possible from hard shifts. Sprung disks and restrictor would help quite a bit preventing that shock.

 

been contemplating switching from my exedy twin to an osg clutch. the twin is so overkill for my applications, and trashing input shafts does not sound fun

 

If your torque is below 450, ACT makes a lot of single disk affordable options, but they will definitely have a high release point. It takes a higher release point for ACT clutches to actually float the clutch disk/s so you don't get locked out. Did you find that that exedy twins can be run at a low release point and don't need more clutch travel to completely disengage?

 

not really. i had to adjust it higher once to fully disengage, people are still surprised how high it engages at.

 

I have asked. We had an extensive conversation about the whole thing the last time my trans was there getting redone. After 20k miles on an exedy twin, my input shaft splines were fine. Granted I don't drag race or launch my car much, but still.

 

can u mitigate by slipping clutch more?

 

You should always be slipping the clutch on a launch....

 

If its anything like a DSM, using the restrictor (or accumulator in DSM world) to prevent engagement too fast on a twin will help a bunch. On my XTSS, the restrictor pretty much wont let me over launch the car and I cant get much better than 1.8 60ft dumping the clutch. I have tall gears and tires though.

I havent pulled the restrictor cause I have a exedy twin on the shelf ready to go in this winter.

 

I hate the ACT high rpm shift lockout so much, it's the #1 worst thing about my car and it's been going on for years. I straight up get shift lockout in my dreams/nightmares at this point, it's nuts. I have to give the rod another quarter of a turn every couple of weeks, about 5-10 launches. I regret letting the shop put another one of these things in. The engagement point is totally maxed out, I even did the thing with the stop to give the pedal more travel. I can't left foot brake anymore because of how high the clutch sticks out (edit: probably like 1/4" more but it's enough to get in the way). Don't tell me about Jack's video tutorial cause I'm the one who put it in writing on here. I've spent a lot of time with my head by the pedals. And no, the pedal assembly isn't cracked.

Absolutely sick of it and can't wait to kill it. ACT is not made for shifting anywhere near 8k. Hard to believe anyone has had good results with theirs. Either they're shifting lower, their syncros or flywheel are better, I don't know but I'm done.

I don't care if they're affordable, the car isn't worth it if you can't shift it.

 

I've had the XTSS, lasted 60k miles or so, now on HDSS. I never had lockout but I'm at the stock limiter, dunno if that makes a difference. But no complaints so I stick with it,

 

Not a fan of ACT either. Had one originally back in 09 and won't ever use them again. Went straight to the exedy twin and I loved it up until I started trashing parts faster. But that's racing though right. I'm curious if others have tried something different.

What about the Tilton or QM twins? Hell even Cusco makes clutches.

 

i tried an exedy single when i was like 220kw atw and i broke 3 release bearings and threw the whole clutch in the bin.

Mainly cause the exedy agent here was like ooo wow ive never seen that happen before! every time i took the broken release bearing to him. after saying it the 3rd time i decided he was 100% full of **** and vowed never to buy anything from him ever again haha. went the twin and ive never had a clutch issue since