I wish I never was able to make this post. I've been through more clutches than I should have, for a car that I've owned for almost exactly 3 years and that only works for about 6 months a year.
Stock pressure plate / disk on the left CMS4 pressure plate / disk in middle SPEC3 pressure plate / disk on right
The first thing I noticed today was the differences between the pressure plate that SPEC uses compaired to the CMS4/Stock. The CMS4 plate is a bit heavier, and it seems a whole lot simplier. I also noticed that there is more surface area on the pressure plate compaired to the SPEC unit.
Slightly damaged CMS4 disk with less than 500 miles + CMS4 pressure plate
SPEC crap
I also noticed that the stock pressure plate and the CMS4 plates are almost identical. The SPEC one is completely different.
I used a really shitty bathroom scale and decided to weigh all 3. I don't know how accurate these numbers are because the scale tare was about 2.5 pounds, and the needle would get stuck sometimes, so take this with a grain of salt.
Stock pressure plate + disk = 13 pounds SPEC pressure plate + disk = 13 pounds CMS4 pressure plate + disk = 16 pounds
The SPEC unit "felt" the lightest. The CMS4 unit "felt" the heaviest.
Fuck it. Time to go install this thing.
EDIT: Hold the phone. I noticed one more thing that was pretty interesting. I have no idea what this thing is called, but I noticed that each pressure plate had it's own thickness for this part.
#3400, "RE: CMS4 / SPEC3 / STOCK clutch pictures+comparisons" In response to Reply # 1 Sep-03-04 06:13 PM by Dave41079
You compared "stock" to them, but was it Sachs or LuK? They're both "stock", and both different. Also was that the standard Spec PP, or the lightweight version?
Lets just say this... I'm over 100whp and soon to cross 200whp. Thanx 2GNT! Now if I could only learn to prove it.
#3443, "RE: CMS4 / SPEC3 / STOCK clutch pictures+comparisons" In response to Reply # 2 Sep-09-04 06:22 PM by ner947
The stock pressure plate and disk are SACHS. Huge SACHS. Fuzzy SACHS.
Since the SPEC plate doesn't look ANYTHING like the stock and CMS4 plate, it doesn't have any markings, so I conclude that it is a LUK unit. I'm not sure if it's the "lightweight" version or not, I bought it from MotoFool last summer (don't ask). However, I didn't ask for a lightweight version - I didn't even know there was a "lightweight" SPEC pressure plate.
EDIT: By the way... The new pressure plate is awesome. It's performance is on a completely different level than my old one. I don't know why I wasted my time with that old plate that slipped all the time.
#3459, "RE: CMS4 / SPEC3 / STOCK clutch pictures+comparisons" In response to Reply # 3
I just took out my CMS4 and I would like to confirm that both the pp and flywheel is a Sachs. I would also like to add that reusing your stock head bolts is a no no. I looked in that "infamous" back corner of the head and I can see where the oil is leaking.
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