18 replies to this topic

[Ethel]

A lot of the clutch actuation looks like it's pinched from the inline A Series. Inline meant there was a spigot shaft in the way, compromising where the release lever pivot could go. That, in turn, would compromise the spring rate of the pressure plate or the bore sizes of the hydraulics and/or clutch lever ratio.

 

That's a long winded way of saying the Mini slave is way longer than it needs to be - even with the more conventional Verto pressure plate.

[Ethel]

I run them on my KAD alloy flywheel, but I've never set them by the book as I hate the feel of hitting the throw out stops before the pedal hits the floor. I set them so the pedal hits the floor at the same time that the throw out stops bottom out. It's never caused me any issues.

 

Metro master cylinders have a smaller bore diameter - lighter clutch operation & more pedal travel.

 

MGF is the same. Minispares stock it  , can't make out if that's because the very last MPIs used it too.

[Spider]

That's a long winded way of saying the Mini slave is way longer than it needs to be - even with the more conventional Verto pressure plate.

 

Some of that 'more length than is needed' is to allow for normal plate and pivot points wear, all which more the a arm further out and the piston in the slave closer to the circlip
 

[plsosds]

Great question, Bill! The reason overthrow nuts (sometimes called limiters or safety stops) are often considered unnecessary or omitted with certain lightweight flywheel setups comes down to overall machining tolerances, clearance, and the diaphragm travel limits of modern performance clutch kits. Traditional heavier setups sometimes experienced excessive pedal travel or clutch arm over-extension due to flywheel bulk and stock tolerances, whereas precision aftermarket kits (like the Mini Spares lightweight assembly) are engineered with optimized stack heights and diaphragm characteristics that naturally prevent the release bearing from over-traveling.