Clutch slave cylinder question???

[ZSaint]

I do not have enough travel in my clutch arm. I am using a Centerforce II clutch assy. I have a 83 5-speed with a 280Z T/O bearing, '71 240Z clutch arm, adjustable clutch rod (to fit the 240 arm) with a 280Z non-adjustable slave cylinder. It looked good during mock-up as the arm is perpendicular to the driveline. It does not release the clutch disc when the clutch is depressed. I have not started the engine because I am waiting for a set of SU's. I know the disc is new and fuzzy but it still should release the pressure. Can I adjust the rod? Do I need additional pedal travel? Should I install a new (already have one) 240Z slave cylinder? Just looking for info on this set-up. I changed to the non-adjustable 280Z slave to get away from the adjustment. What are the differences in these two slaves? They look alike to me!

[dogma420]

The Centerforce II has to be for a 280z (has to match the tranny)...not sure about the 71 clutch arm...I think this needs to be 280 as well...

or if you have a 240 centerforce, then the 280z t/o needs to be changed to a 240 and the slave should be changed too.

In other words, from the slave all parts should be 240 or 280.

Anyone else want to chime in? When I did mine, with a 77 5 speed (on a 72 240) I used a 77 slave, 100% all clutch parts were 77.

With the stock 72 master cylinder, I did have to adjust the rod almost all the way out (that is between the pedal and the firewall...when it wasn't adjusted, it had the same symptoms you describe.

[SteveK]

I had exactly the same issues as Dogma when I did my 2.8 conversion even though I had used 280zx parts right through (flywheel, clutch, throw out collar, fork, release bearing, slave cylinder lalalalalalala).Clutch wouldn’t release completely even at maximum pedal-rod adjustment (reverse would crunch and had I to declutch to get it in) I tried everything, braided lines, new piston and seal kit, new slave cylinder etc. I was only when I did my fuel injection project early this year that I got around to fixing the issue good and proper by using a bigger bore master cylinder from Wilwood, I had too as the ACT clutch that I also put in is a pig to use.

[ZSaint]

What size clutch cylinder did you use? 11/16? It is 5/8" stock I believe. If you move more fluid the slave cylinder will also move farther. It will also be a heavier clutch pedal with the larger cylinder. I wonder if the Centerforce Clutch (II) is just too large (needs more T/O movement) for a Z application. They build the same pressure plate for several engines and just redrill the mounting holes to fit each application. I had my flywheel re-surfaced and the machinist put the .006 step into it just like it calls for in their book. I will try putting the pedal setting in it's longest throw and adjust the slave cylinder rod tight to see if the clutch releases. I hate clutches that do not work. Please let me know the diameter and manufacturer of your larger clutch cylinder. (I am thinking the brake cylinder was 5/8 and I installed a 11/16. I cannot remember what size the clutch M/C is. I will look tomorrow. It is a new one, too!)