Review: Went from Exedy Twin HD to Quartermaster Twin
Jun 9, 2009, 05:29 PM
#34
I have a similar clutch (PTT 7.25) with sintered bronze material and it is an amazing clutch to drive besides the noise. When adjusted properly it will be easy to drie and it shifts SOO awesome. However, I am wearing the disks out about every 7-8K miles. I have gone through two sets of disks in 15K miles. This is in a mid 12sec street car daily driver. I will not break and it will hold the power but it wears out quickly. The sintered iron material is longer lasting but the bronze material that PTT uses doesnt wear any of the mating surfaces and it didnt need anything but disks when I took it apart the last time. Also PTT offers free rebuild labor on all clutches for life. You pay for parts thats it. I was considering trying the organic disks this next go round but I think I will stick with what I know works as this one does.
Sep 2, 2009, 11:07 PM
#38
My experience with the QM Twin
When you say almost 20K out of the clutch I'm assuming you mean in the high 17-18k range, this is about what i would expect to see someone getting out of the clutch regardless of the amount of power the car is making, so long as it doesn't exceed the maximum rated amount for the clutch. It'll either hold, or it won't, there's no real in-between with this thing.
Here's my personal review/$.02...
I got 47,427miles out of my stock clutch with plenty of material left on the disc to last a lot longer, but unfortunately the car was making a bit more torque than the pressure plate could handle at that point.
Put a quartermaster in the car and have loved it from day 1. Until it slipped on me last week. I just rolled over 65,000miles today so if you take, say, 250 miles off of that number (for arguments sake) when the clutch slipped last week thats approx. 17,573 miles that the QM lasted. A friend told me from what he's heard this is pretty high mileage for a QM, but I still expected it to last a bit longer, say at least 25K. Being that each disc is .250" thick. But, I guess, so I'm told, "Just because the material is more robust, that doesn't necessarily mean you're going to get more life..." Which still doesn't make much sense to me, it would make sense for that to be exactly how it should be...
Sorry, I digress...
I daily drive the car as well as visit our local 1/8 drag strip, and or, stoplight pretty regularly. To put a number on it, the clutch easily has 40+ launches on it with about a third at the track and the other two thirds on the street.
It is an AWESOME clutch to drag-race with. Launches very clean if slipped properly and feels like a hot knife through butter shifting at 7,800rpm... The 6-speed never felt so smooth. If you give it a little less slip on the street it will put on a nice little show and blow all four tires off, which is always fun.. haha.
Another thing I almost forgot to mention, which you'll notice immediately after install. Engine response. Being that the assembly is only 17-18lbs. (can't remember exactly how much it weighed) the car is SOOO much quicker to respond to blips when downshifting, makes the evo seem more like a snappy NA car when free-revving, which also lets you get up to two-step a bit quicker as well. I must add that it does take a little tinkering with the stock ecu to get the full effect of this because most of the problem (rev-hang) is in there to begin with. Pedal pressure is also as soft, or even a bit softer than stock, with very good engagement feel.
Overall I thought the clutch was great, and if you can live with the loud deceleration noise, the high pitch squeel the clutch emits when first being engaged from a stop (sounds like you're killing birds in your bell housing), and being a bit more attentive when coming off from a stop, I think you'll have a good time with it too.
Like I said earlier though, the only gripe I have is I was expecting this thing to last at least as long, if not longer than stock.
-LC
Last edited by Little China; Sep 2, 2009 at 11:25 PM.
Oct 25, 2009, 11:47 PM
#41
I say this because I've noticed that it's a pretty linear rate of wear, it has been getting worse and worse every day pretty predictably since I posted above when it first slipped on me. And I obviously haven't launched the car since before then.
So if you're not going to launch the car(often), the Quartermaster probably isn't the clutch for you.
I'll be posting up soon with a review of a clutch that many haven't considered, hopefully it will be as good as it sounds. It's not in my hands yet but it will be shortly.
Last edited by Little China; Oct 25, 2009 at 11:51 PM.
Jan 21, 2010, 09:26 PM
#45
I have a similar clutch (PTT 7.25) with sintered bronze material and it is an amazing clutch to drive besides the noise. When adjusted properly it will be easy to drie and it shifts SOO awesome. However, I am wearing the disks out about every 7-8K miles. I have gone through two sets of disks in 15K miles. This is in a mid 12sec street car daily driver. I will not break and it will hold the power but it wears out quickly. The sintered iron material is longer lasting but the bronze material that PTT uses doesnt wear any of the mating surfaces and it didnt need anything but disks when I took it apart the last time. Also PTT offers free rebuild labor on all clutches for life. You pay for parts thats it. I was considering trying the organic disks this next go round but I think I will stick with what I know works as this one does.
Carlos