Need a favor: Clutch slave cyl measurement plz!

[Matt93SE]

Working on installing my wilwood pedal assembly, and I forgot to measure how much range of motion the clutch slave cylinder has.

I bought a master cylinder the same size as OE (5/8"), but I forgot to meausre how much the slave moves when the factory pedal is pressed to the floor.

The problem is that I need to install a pedal stop behind the clutch pedal and I have no idea where to put it yet.. there is enough movement there that I can literally turn the clutch inside out or pop the slave cyl piston out if I push the pedal to the floor.

Sooo, I need someone with a stock S-chassis setup (KA or SR) to push their pedal to the floor and measure the movement of the fork or slave cyl for me.

Can someone help a guy out?

[cdlong]

I measured the pedal travel (I remembered your request wrong I guess) and the movement at the clevis is right about 1". I hope that helps, I won't be able to get under the car to get what you actually asked for for awhile.

[Def]

That should give you the info you need tho'. Stock MC is 5/8" right? Stock slave cyl is 3/4" I think. So you just find the ratio of their areas to know how far that MC movement translates into slave cyl movement.

[Matt93SE]

Thanks!

I should be able to use that. I bought a 5/8" MC because that's what the stock size was, so I should be okay. I just hope it has enough travel. Pedal assembly has a 6.25:1 ratio and I think I have about 8" of travel before I hit the firewall. so I *think* it will be okay. I welded up a pedal stop on the firewall that doesn't touch the pedal unless I have a bolt stuck in it, so I can go anywhere from nothing to full travel as needed.

Hope to find out Tuesday if it all works. everything is mounted, just working on the control arms now and when I get done with that, the dash goes back in and I start adding fluid!

[justinmc]

Why not swap your S chassis pushrod/arm into the Wilwood master cyl?

[Matt93SE]

Because I am completely replacing my pedals with a wilwood pedal assembly and I can't use any of the stock crapola.

[justinmc]

Because I am completely replacing my pedals with a wilwood pedal assembly and I can't use any of the stock crapola.

Lame.. That should be pretty bad ass once its done.

[CodyAce]

I'll say this, I swapped to a Wilwood Clutch master cylinder in my car, and it felt like **** using the stock rod between the TOB fork and slave cylinder. I musta bled it 10x, adjusted the MC rod all the way out, still felt like ****, wouldn't shift/release at high RPM...

Put a longer rod into the slave cylinder, (I wanna say between 1/4 and 5/16 longer) and it seemed to solve all issues.

[justinmc]

Put a longer rod into the slave cylinder, (I wanna say between 1/4 and 5/16 longer) and it seemed to solve all issues.

Stock trans? I'm running a wilwood for a LSx setup w/ the T56 and quite a few of the guys mention swapping to the 240 rod. What you are saying does make sense in my book. I haven't installed mine yet but my plan was to try to keep the wilwood rod.

[Matt93SE]

I didn't have any problems with the clutch throw. I was afraid I was going to flip the clutch inside out, but it turns out the pedal engaged just off the floor. I could probably turn the adjuster a bit on the pedal assembly and move some stuff around a bit, but it's doable and once I got the car out on track, I couldn't tell a difference between this pedal and stock operation-wise.

Justin, I'll be sending you an email later about those scales. Think I'm going to take you up on your offer.

[Willy077]

Working on installing my wilwood pedal assembly,

FOTOS please!
and what p/n of your pedals kit?

[Matt93SE]

photos are in my build thread here: http://nissanroadracing.com/showthread.php?t=908&page=8

Don't remember the p/n, but I wouldn't recommend them. I'd leave the master cylinders in the engine bay and leave the room under the dash for other stuff. it's CRAMPED in there!