Rb25 Slave Cylinders

[Staged_rs4]

Hi all

Can someone tell me the difference between slave cylinders for RB25 boxes? One is straight and one is right angled.

I have the right angled one, my clutch take up point is very low, practically at end of pedal travel.

Does anyone know if the straight one has the same mounting bolt diameter as angled? And does the straight have a longer travel?

Its for a conversion and bought the box without a slave. So can't just replace old with new.

Cheers

[Dobz]

Straight and right angled? This doesn't describe them very well. Put some photo's up to show the difference you mean.

Have you tried adjusting the clutch pedal to move the take up point?

[GTSBoy]

Yuh, are you sure you're not confusing normal R33 RB25 push type slave with R34 pull type slave?

[Staged_rs4]

Hopefully these two photos clear up what I mean. I have the slave shown in top photo. I also have the nismo 13/16" unit.

Is there a difference between these aside from hose thread and blees nipple location? Im hoping there is two different types of slaves for 25 box, one with a longer rod?

There is no pedal box adjustment for my car. The clutch master rod is also adjusted all way out

Edited March 19, 2015 by Staged_rs4

[Dobz]

The system is properly bled?

I'm curious on the reason you bought the nismo slave, is your clutch extremely heavy?

[Staged_rs4]

Im certain the system is bled.

I bought a larger slave due to choosing a button clutch kit with an option of a heavier clamping pressure plate. Slight hydraulic advantage would give a slightly easier pedal to push.

The box is bolted to an FJ20. All Exedy heavy duty button clutch kits, listed for R33, R32, RB20/RB25, S12 Silvia/FJ20 are all the same part number. Thought the release bearing might be different heights for each model, but same bearing in all kits.

Clutch is 100% installed correctly. Can only go on one way anyway.

I can feel the release bearing pushing the pressure plate fingers through the pedal, however as said this at the end of pedal travel.

[Dobz]

You'll be reducing the throw on the slave more with the nismo making the problem worse assuming the rod length is the same. You need to pull the stock one to compare.

You could just make a longer slave rod to get it in to adjustment if required. If you have a hacksaw and a bench grinder you can go and buy some 4140 steel rod and cut to the length you want. It wouldn't need much more length by the sound of it.