Jim Berry And Nismo Slave

[paul_psi]

so iv put in a jim berry full Monty clutch and a nismo slave cylinder and the clutch is right on the floor to the point where it JUST engages (wheels need to be turning) iv got the adjustment on the pedal the hole way out and iv got 13-14mm of travel at the slave there's 6 mm release on the pressure so that travel is just enough I'd like a couple more mm at the slave anyone know how to get it or go back to standard slave?

[paul_psi]

it's a r33 gtst s2

[89CAL]

Nismo slave is bigger then the standard slave, and it looks like you are still using the same master cylinder. This means that the master cylinder is possibly not putting out enough oil volume to fill the nismo slave cylinder enough to have proper pedal travel. I would say put the standard slave back on or buy a nismo master cylinder

[paul_psi]

the nismo slave has a bigger diameter bore not more travel. that's what jim berry told me he said in some cases it has less I'm going to put the standard one back in tomorrow and see just wanted to know if there was any other way

[Ben C34]

bigger bore means it needs more fluid as 89cal said. That would make the pedal travel further to get the mechanical advantage.

[paul_psi]

so been reading as much as I could find seams this problem has happen before and the guy resleeved the slave even smaller and it fixed the problem I think that's what I'll be doing in the morning any other ideas please let me know

[89CAL]

Put the stock one back before you go wasting money on re-sleeving. Because esentially you have a bigger slave that you are going to engineer back towards standard size

Understand if the standard slave holds (as a number exaggerated for the purpose of this example) 1L and the nismo holds 2L of brake fluid and the master puts out 100ml of travel per cm then you will understand why its doing what its doing.

[paul_psi]

that makes sense thanks

[Dose Pipe Sutututu]

I've used a R32 GT-R (push, pre March 1993) Nismo slave with a 1.1 ton Exedy GT-R clutch on my GTS-t R33, no dramas

could be clutch related

[paul_psi]

okay it's driving and I'm stoked the problem was the nismo slave does NOT have enough travel to engage a jim berry clutch! the standard slave with the adjustment on the pedal all the way out is what iv got now and the clutch is grabbing bout an inch off the floor. so iv taken my nismo slave to the shop and its getting resleeved down to 11/16 which is 1/16 smaller then standard which by theory will give me approx 1.5-2mm more travel on the slave allowing me to adjust the pedal back to where it should be and I should have clutch engagement at 80-100mm off the floor or to where I feel comfortable around that I hope this helps someone else because iv had one massive headache the past week trying to work out the problem

[SargeRX8]

So then what was the point of using the nismo slave?

[paul_psi]

At the start was to make the pedal lighter