My Qm lasted 20K miles first time before it needed a rebuild and I rebuilt it again at 12K, I had their old style TB which was very difficult to drive and made alot of noise and it didn't bother me at all. The new style TB is much easier to drive and less noisy as already stated. The clutch supports any power level, and is quite easy to get use to.

The weight difference from QM and Exedy quite huge 18.6 compared to 32, and also the hydraulic release bearing makes high rpm shifting like butter compared to the Exedy. I always had problems when I ran Exedy clutches and have no issues with QM.

 

that pretty much sums it up. also very hard on drive train parts. I had one for two weeks and couldnt stand it. made me spring for tilton carbon/carbon dream clutch.

good clutches when the driver knows how to drive. this is a very important statement when discussing clutches. some can drive a stock clutch deep into the 11's with out hurting it. most will burn it up trying to hit 12's. the carbonetics clutches are very well designed but they dont handle poor driving technics well. if you search you will find people raving about the clutch and getting very high mileage. and you will also find people who killed it at the track on their first visit. the twin is a good choice for 450-500. beyond that you should opt for the tripple. its a smooth clutch, modulates well. shifts very well. but is very noisy due to floating plate design.

thus crcain statement. he burned one up at the track on his first outing if If my memory serves.

 

I've never owned a Carbonetics clutch. But have known people with catastrophic experiences with them.

https://www.evolutionm.net/forums/7378743-post42.html
https://www.evolutionm.net/forums/7381714-post55.html

As for the Quartermaster, I think I remember talking to Shep about it on the phone, I think he described it as... damnit I can't remember but it was something along the lines of primitive or crud.

 

Also, am I correct in saying, that to some extent, the lighter a clutch is, the harder it is to daily drive? The lack of intertia causes the enging to want to stall during engagement at low engine speeds. Is that a correct assertion?

 

sounds pretty correct, but i don't really have an issues once you get used to it... its nothing

 

so are you guys testing the current model or the one that will be out in the ~4 weeks?

Regardless, Good to hear. I shall wait for the newest model. I'm in no rush since I put the Evo away for winter.

 

Old Style QM clutch caused 4 local motors to crankwalk. I put in a request to QM asking about information, even blindly called up a few big installers of the clutch and no one was willing to talk about it because so many vendors sell them.

All the motors were 2.3L, 1 had K1 crank the rest were OEM Mitsu, ACL Bearings.

I loved the clutch when it was in my car but it personally ate my input shaft and took out 2nd gear then after the trans was fixed my car was stalling between shifts which I thought was BoV related and then it started stalling from a dead stop. The crank was pushing the trigger plate into the sensor and then stalling.

I have heard that there are others that have had this issue but no on will talk about it openly.

 

Possibly both will be tested. The Ceram is in there for now and we'll have a report shortly.

 

Tilton, PTT, QuarterMaster all share similarities. Disc spline area is relatively small on all these twins. With 2.3L strokers they cause more engine harmonics which are transmitted through the input shaft that can wear on the splines over time.

Quartermaster uses HARDENED hubs for this reason as well as one of the discs has more contact surface area to the input shaft on their current design.

I have removed damaged Tiltons from tearing up input shafts and rounding off disc hubs, helping comminucate this information to them for Tilton to fix these issues.

Quartermaster has a handle on the inherent issues with a 7.25" clutch and appears to have addressed them all.

 

On that note is if funny though that Shep rec's and sells them on his site correct?

I think it may be good to include the diffreence between the "old" and "new" versions and when they came out to clarify for others.

I know there was a revision to "hardened" hubs but not sure when that came about.

I bought mine a while back from Devo Tuning and it was said that mine did indeed have the updaded hubs.

Would the "newest" clutch you're speaking of be the one "tweakdsm" has been prototyping???

 

anybody else?


TTP any updates on the review yet?

 

The clutch is in, working good so far. Working on some launching techniques and then we will have the written review up.

So far 1.67 60" time and shifting is great.

 

veeeeeeeeeeeeeery noisy. it actually sounds kind of goofy =)

 

good to hear, keep us posted in this thread if you can

 

I have this clutch in my car i have about 3000 miles. Daily driver 200 miles a day. I love it shifting is a joy no matter how hard or fast you shift, its like butter. Yes its noisy but so is my exhaust