Pull Type Clutch Master Cylinder, ...just when you thought there wasn't another way to do it! Options

[tomeric914]

You've probably seen my other threads on the hydraulic release bearing and reservoir mounting, but I've saved the best for last.

There are some decent solutions to adding a clutch master cylinder. Some require cutting a 2" diameter hole in the pedal cluster area which doesn't allow you to use the pan underneath and opens up a giant hole for water and air to come in, others are really expensive (using the G50 pedal assembly), and at least one other I've seen uses a cool bell crank mechanism which places the master cylinder inside the car by your feet.

My solution uses a pull type AP Racing master cylinder located inside the center tunnel. What's neat about it is that there is only one hole needed to be cut, there is no noticeable intrusion into the cabin (carpet or center console will cover it) and it is completely reversible if someone wanted to convert back to the stock clutch cable arrangement.



The master cylinder is pulled by the stock clutch arm which has about 1.1" of travel which is perfect for AP master cylinder.



There were lots of little design challenges in this project which required some late night searches on the web for alternative parts. Placing it inside the tunnel and working around a roll cage made for some installation challenges as well.



(Sorry for the blurry image) This was taken upside down through a mirror inside the tunnel which was reversed so it shows in the proper perspective. Yes, the throttle cable runs right by the master cylinder but does not interfere with it. I haven't had a chance to test drive it yet. It's currently 1 deg F and we have about 3' of snow.

These master cylinders aren't inexpensive, but the rest of the parts aren't terrible. If anyone is interested in doing this conversion, I'd be glad to put a kit together! (IMG:style_emoticons/default/driving.gif)

Thanks to:

@cupomeat for putting the idea in my head and allowing me to bounce ideas off him
@gregamy for the "pretirement" encouragement
@tygaboy for mentioning SendCutSend in his many well put together videos

[Ninja]

Good stuff, thanks for posting.

I will be using a complete Boxster/Cayman 6 speed.

The clutch master is a mod I am going to have to do.

Sticking it in the tunnel is an excellent option!