High clutch engagement with RJM?
 

Hey all. So I'm the second owner of my Z, and don't really know what was done to it before I had it, but ever since I purchased it, it's had a very high engagement point, and super small friction zone. I figured it was normal, as most people in the forum complain about it.
So I bought the RJM clutch assembly, and the clutch is almost the same, and maybe even a tad bit worse. The friction zone is phenomenal now, but the engagement point is so high that when I fully let out the clutch I think the clutch is just barely fully engaging. When I first drove it I thought that the clutch wasn't fully engaging, but it seems to drive fine, besides some hard pulls.
When I do hard pulls, 3rd gear seems to completely slip. Almost as if the tires are spinning, but they are not, and it happens throughout the entire gear. Also, when I was installing the RJM clutch, it looked as if I have a different master cylinder than stock. So I guess my question is where should I start looking? Could my clutch be worn out? Might I need a new master cylinder? What would cause this issue?

Sounds to me like the clutch is worn, especially if it's slipping. I would verify your pedal is adjusted correctly since there are ways to drop the friction point to make sure it is fully engaged when you're off the pedal.

The only thing is that before I installed the RJM clutch assembly, I never had slipping. I just had the high engagement. I went through again today to see if I could get it to slip, and it slips through 1st, 2nd and 3rd when I floor it. The clutch fluid looks relatively clean. I'm honestly not sure what else to check.

you need to adjust the clutch engagement point lower. You need to have some free play on the clutch pedal when it is released.

I've completly maxed out the lowering of the clutch engagement. Both through the AFP setting on the RJM Assembly, as well as the master cylinder rod into the clevis fork. I'm not sure where else i can adjust it at

Bringing this back from the dead, but I have the same issue right now... extremely high engagement point and I've maxed out all the adjustments I could do. Don't quite know where to go from here?

If you have it adjusted properly with a little free play at the clevis and loose enough to where the master is not holding pressure in the system and partially releasing the clutch, your clutch is probably just worn out.

Brand new clutch installed. Going to try the new RJM CMC and take pics for RJM as well. No adjustments have made it better as of yet.

What is your clutch set-up? Brand, Release system?
Clutch type/design can do this as well.

South Bend Stage 2 Endurance with quiet disc option, DXD pressure plate and the lightweight flywheel. RJM clutch pedal v3 as well

Was the disk a Kevlar or a dual friction disk? Yellow leather like disk material?

Nope not Kevlar

I just recently went through this problem as well, had the tranny dropped TWICE because after the new clutch and flywheel install it still had high engagement issues with slipping problems. after a week in the shop and back and forth with Nissan we finally figured it out. The release bearing on the clutch was messed up. when we replaced this the problem was resolved and the engagement point was back down to factory.

Hope this helps

Hmmm... stupid question - but the release bearing - is that the pilot bearing, or something else? I replaced the pilot bearing when putting the new clutch in, and the trans was brand new. Unless it's something attached to the engine that I didn't touch then it shouldn't necessarily be this, but thank you for offering up other options/issues to check!

Hey man, I'm going to be honest and state that I do not know exactly where the release bearing is. I have a mechanic that does all my work (follow my youtube channel for the documentary on it)

All I know is after a week of it not engaging right and slipping still, my mechanic resolved the problem be replacing the release bearing in the tranny. I don't know where that is or what it looks like, all I know is that was what was causing the engagement issues and slipping.

also forgot to mention, the release bearing is not the pilot bearing. We replaced the pilot right form the beginning and there was still slipping issues

Release bearing pushes on the clutch pressure plate fingers to release the clutch, Unless whatever is pushing the bearing (slave cylinder) is sticking really bad the release bearing really wont cause a clutch to slip. If it did it would be a REALLY rare occurrence or most likely a poor install and it wasn't centered correctly.
I have however seen this locally with a cheapo/china aftermarket CSC slave that had a plastic guide tube and the bearing was getting jammed on it upon release and would not allow the bearing to retract all the way.

High engagement is one thing, High engagement by itself wont hurt anything and can be normal depending on clutch/type design, If it has high engagement AND is slipping there is a problem.

Sounds like the pedal is hitting the top switch and not letting the master cylinder fully open up. The switch is probably set too low and/or the clevis is set too far away from the master. The clevis should be able to jiggle when the pedal is raised. The clevis should stop the pedal movement at fully open. Not the switch.

This is correct info!