So I picked up my coupe today after install of an OS Giken STR dual clutch and integrated flywheel. I chose the OS, cuz it was marketed as being extremely streetable, durable, w/ similar pedal effort to stock.

I was expecting some noise and or vibration b/c of the lightened flywheel (as everyone who installs one should be), and also having to "relearn" to drive the car and or deal w/ break-in issues.

First off, the tech said everything installed perfectly and a couple weeks ago, I swapped out my factory rubber clutch line for a nismo ss line w/ motul fluid flush.

Started up car, turned on ac, turned off radio, rolled down window. Did not feel any added vibrations and maybe there is a little extra noise at idle, but I already have gotten used to added noise w/ headers and at idle. It is interesting to note, that on the trip home, I experienced zero chatter or extra noise/vibration at idle, except right before I turned off the car (and this did not last a few more seconds). I really hope this continues to be the case at idle!

BUT, there is definetly that infamous cement mixing noise when accelerating from low rpms (but this is only during a small section of the rpm band--maybe b/w 1800-2000. But, I was able to pretty much adjust my driving style to minimize the noise by keeping the rpm's above 2k, which I think is well reasonable for daily driving).

AND, (I really hope this is a break-in issue)--Cloud where u at?--1st gear is ridonculously grabby and it is so hard to get the car moving from a stand still w/out experienceing shuddering or overreving to get it going. I am also still getting used to shifting faster as a result of the rpms dropping faster, just as they climb faster w/ the lightened single flywheel. The engagement point, surprisingly seems to be almost just as high as stock, and the pedal effort is the same, if not a little easier. There is also less play. But so grabby in 1st

I'm trying to break-in the clutch properly, but it's so hard to drive smooth right now. Anybody know if the grabiness will improve as the clutch breaks in w/ the pressure plate and flywheel? I don't want to have to launch every time I am stuck in traffic. Anybody have any suggestions?

After 1st, however, shifts are smooth, crisp, and precise. Shifting when driving feels great No more notchiness and for some reason, the shifts seems shorter?. So, I really hope the grabiness gets better when the clutch breaks in, or I adapt better to the setup, otherwise I feel like I lost a lot of driveability w/ this mod. But, I'm keeping my fingers crossed.

If anyone could chime in on whether the grabiness/shuddering will get better as the clutch breaks in, it would be appreciated

 

i have the os giken twin disc in my car and feels stock to me and grabs great no problems even from a regular take off or a launch. my only complaint is the chattering when i push in the clutch, but it's a twin disc so i'll deal with it. but i love it. and it holds good power.

 

^^The grabiness is getting better as the unit breaks in and I am getting more used to it. I get chattering only sometimes when the clutch is not pushed in (when clutch pedal is pressed, noise goes away. Is this what you meant, or did you originally mean the opposite?

 

Any updates after three years? I just ordered one of these for my car this week and I was wondering if anything has changed with your setup over the years.