This morning, at 30F,, 5th gear, clutch started slipping. I've had this clutch in for about 4 years, 30K miles. I never did the push rod adjustment, as did not seem needed. I did change cylinders (master and slave) a few months ago.

Cold weather changing friction? Cold air yielding more torque? '99 Stock Rod engine, so I would think well within the limits of this clutch.

Experiences and suggestions?

Yes I am. Per my pulse width, I am likely about 5% more torque than typical, so about 220 - 230 ft-lbs. So, yes, up a little, but still should be within spec of this clutch, easily.
EBC is holding boost level pretty well (maybe 4 kPa over normal), so the 5% would be more air density related.

EDIT: Just remembered that last month, I replaced the bump stop on the pedal. Perhaps I should adjust position. Perhaps, go underneath the car and make sure the slave plunger is loose.

Update.

This afternoon I checked pedal play and there was some. It was 45*F, but still slipped, not just at 16 psi, but at about 10. So I took it back to waste gate of 7.5.
Looks like I'll have to pull the clutch and take a look.

Will be a couple of months, as I have surgery coming.

So, could it be possible that clutch is finished this quickly?

DNM

DNM I had a similar issue where at my same usual power level the FM1 clutch started slipping. I was at 14psi on a GT2560 so no way I was overpowering it. I adjusted the clutch several times to no avail. Ended up pulling it and posting a thread here to see if anyone saw issues with the disc and no one saw anything, check my thread history for details. I ended up swapping in a supermiata sport clutch puck and haven't looked back. I didn't bother trying to have FM look at the clutch or make it right because I was over it. I wonder if there is a manufacturing issues with these?

I never slipped my FM1 clutch at 16 PSI or those power levels. Not sure what would cause yours to slip... I did however slip a SPEC level 2 clutch at like 12psi. With a 2560.

How's your rear main seal?

Clutch may be fine, but if the seal starts leaking it wont be able to grab the now greased up friction plate etc.

My FM2 has suffered a Similar fate.

New at time of change-out. No oil noticed at rear of engine (XMSN weep port) at oil change last week.

Ordered SuperMiata Organic Sport today, to have on hand when I pull the old one.