Unhappy with Spec clutch

I have around 500 miles on a stock LS7 flywheel, PP, and Spec LS7 clutch disc. New rebuilt torque tube from black sea. Clutch disc is supposed to be stage 1, or stock feeling. After the break-in period, car is still almost undriveable on the street. Lurches every time on take-off and is very very hard to feather out for smooth engagement. Clutch is on or off with nothing in between. From my research this seems to be from the lack of marcel springs on the clutch disc which allow the smoother engagement. Am I the only one trying to use a Spec clutch on the street? I can't imagine anyone using this setup for a daily driver.

Could be some preload on the throw-out bearing if the clutch master push rod is set too tight. You should have a little bit of free play. If you dont, as the brake fluid heats up it expands enough to lightly engage the clutch, so you can get some lurching from that as the disc slips.

I had the Spec stage 2 setup on my car, even with the high pedal effort it was still very managable.

I had the same feeling with a Spec stage one disc. It always seemed grabby. The Spec splines do fit better than the Dodge disc I have now.

I have a spec stage one flywheel, disk and pressure plate. It likes to be dumped. A little stiff it is compared to a factory 944. My pedal is adjusted towards the top. The more I drive it the more I get comfortable with it. The stage one setup is something different from every other clutch I've ever drove and prolly not first time user friendly to a strange driver.

Mi e is completely normal but I have a stage 2. Are you sure your throw out bearing was adjusted correctly when you installed it?

Edited because I should not post when over tired. I will update after I re-check my info.

What kind of clutch master are your running. The stock one will not work well with the SPEC set-ups

Admin wrote:What kind of clutch master are your running. The stock one will not work well with the SPEC set-ups

I have been running the same 13/16th MC and C5 slave cylinder with both the stage 1 Spec clutch and the LS7 setup currently installed. The LS7 system feels like a factory clutch, the Spec was as described above.

I had a picture that showed how flat the marcel spring on the Spec disc was compared to a stock clutch disc. The friction material may be more aggressive on the Spec disc making it grabby.

What master would you recommend for the spec-clutch setup?

Hey guys, sorry for the late follow-up.

I'm running the wilwood 13/16" compact master. It has no problem disengaging the clutch, the problem is that I have to hold the pedal around 1/2 way down for a bit so that it can feather out. As one poster said, it likes to be dumped. The clutch disc is just grabby.

Before this, I was running a stock sachs organic 11" disc with a centerforce 2 pressure plate. That disc had the marcel springs and was much closer to a stock feel. I wanted to try something different because the pedal effort was a bit high for a daily driver, but maybe it had more to do with the MC I was using? Just a bit frustrated at this point.

I have about the same set up as you, an OEM LS7 flywheel and pressure plate with a 13/16th MC. The difference is a Sachs vs Spec clutch disc. My clutch is light enough that the clutch assist spring was removed and the engagement feels like a stock clutch.  The pedal effort is not heavy at all.