Fluid Dynamics? (1 Viewer)

[cult45]

A smaller clutch master will push more fluid at the slave but will require more effort, is this correct? And a larger clutch master will push less fluid at the slave but require less effort?

I have an older Marks' 4WD kit connecting a GM V8 to H55F transmission. I was given incorrect advice and installed an FJ60 Heavy Duty Exedy clutch kit and new 40 series master and slave [1970 FJ45]. The pedal is very difficult to push, engages only 80% of what it really should and kinda like a button clutch - almost. All the engagement is within an inch or less. Not ideal. It feels like it needs more travel at the slave, like it needs to be pushed further than it currently does.

After many phone calls to Marks asking for tech support and getting nowhere, I finally got a hold of an older tech who informed me that my master and slave are fine [my kit will work in any 4x, 5x, 6x or early 7x series Landcruiser] but that I need their custom clutch and pressure plate kit.

My hopes are to retain my existing FJ60 clutch kit but utilise existing Landcruiser clutch hydraulic components.

Can anyone help?

I'm in Australia btw.

 

[thatcabledude]

@Downey

 

[Downey]

The clutch master cylinder and clutch slave cylinder musty be a matching set (matching piston sizes), otherwise your first statement above is correct. Once your slave cylinder travel is correct, then you need a pressure plate that (a) fits, and (b) requires less travel to disengage since your stock Landcruiser hydraulics don't provide enough travel to disengage a stock Chevy clutch. Your present Exedy clutch could be part of the problem, but I have no data on them ???