930 clutch cable... conversion possible to hydraulic?

[Housemarkee]

Hey guys,
I rebuild my engine lately and put a new tranny in.
After that I´ve different problems with the clutch.
In these context I thought about a hydraulic conversion that I found on the CMS Webpage

Have anybode done that before?
What I like to know is:
- what pedal cluster can I use?
- are there a complete kit available?
- somebody expirience?

Thank you for your help
AJ

[s5uewf]

That looks cool!
I had not seen this before.

I would imagine the easiest thing to do would be to install a pedal assembly and master cylinder from a G50 (1987?, 1988, 1989) model year. Just guessing though I would think it would be pretty easy to install. Then run a line back to the slave cylinder.

[mark houghton]

Nice kit but useless without a master cylinder to go with it.

[Hams930T]

You'd need a G50 pedal cluster, a master cylinder and lines to connect the two.

You could source some of the parts from Patrick Motorsports.

- Chris.

[Housemarkee]

Thank you all for your reply.
I thought about the G50 Pedalcluster already, but is this 100% compatible with the mountpoints and the brake in my 87´930?

The G50 Pedalcluster seems really seldome...
And on Patrick Motorsports i found a kit, but not an Picture or how it should work... :-(

Anybody out there who have an picture of an g50 (C2/930) Pedalbox?

thank you,
snow greetings from Germany
AJ

[gumba]

You don't need a g50 cluster to convert to a hydraulic clutch. Not sure if there is a kit available. I ran a hydraulic clutch set up in my vw bus with a 3.2 and 915 trans. For that setup I used CNC parts. I built a twin m/c brake set up for are race car. I used Tilton parts for that one.
The slave on the trans is pretty straight forward. As for the master, there are a couple of ways to go. If you look at the dual m/c setups for 911's, some had the m/c angled up to keep the m/c inside the cabin. On mine, I mounted the Tilton m/c to the back of the pedal cluster housing, cut a hole in the body for the m/c to project out. Wilwood also makes hydraulic clutch parts.
I would go with Tilton. I would call them, explain what your doing and see what m/c-slave cylinder they suggest. I talked to them on a couple occasions when I was doing the dual m/c mods.
I started the dual m/c project when we lived in CA. When I finally got around to finishing it a few years later one of the m/c's kept going flat. I called Tilton to figure our the problem and ready to buy another one. They sent me a new one for free, that's great customer service.

[Housemarkee]

Moin Harold.
Your Bus is real cool with this Setup
congratulations!!!

I looked already at Tilton parts.
The good thing is, that the cluster looking real good and healthy... especially for
track cars a good choice.

The con, that the mounting not real Stock, and I like to have the setup in the way, that I can easy go back to Stock.

but thank you for your pictures.
The CNC Hyd.Pistons are my first choice too.

Regards AJ

Originally Posted by gumba

You don't need a g50 cluster to convert to a hydraulic clutch. Not sure if there is a kit available. I ran a hydraulic clutch set up in my vw bus with a 3.2 and 915 trans. For that setup I used CNC parts. I built a twin m/c brake set up for are race car. I used Tilton parts for that one.
The slave on the trans is pretty straight forward. As for the master, there are a couple of ways to go. If you look at the dual m/c setups for 911's, some had the m/c angled up to keep the m/c inside the cabin. On mine, I mounted the Tilton m/c to the back of the pedal cluster housing, cut a hole in the body for the m/c to project out. Wilwood also makes hydraulic clutch parts.
I would go with Tilton. I would call them, explain what your doing and see what m/c-slave cylinder they suggest. I talked to them on a couple occasions when I was doing the dual m/c mods.
I started the dual m/c project when we lived in CA. When I finally got around to finishing it a few years later one of the m/c's kept going flat. I called Tilton to figure our the problem and ready to buy another one. They sent me a new one for free, that's great customer service.

[gumba]

If you attached the m/c to the body with some re-enforcing instead of modifying the pedal cluster, converting back to stock would be pretty easy. I would go with Tilton over CNC because Tilton has more m/c body choices.

[JFairman]

After having a bunch of BMW's with clutches operated with expensive hydraulics that are made who knows where by the lowest bidder.... You could not pay me to put that GARBAGE into a car.

Having a simple cable operated clutch is HEAVEN.
If you think you need the annoying pain in the ass hydraulics.. then take a few aspirin and go to bed.

[Tremelune]

What's the value in a hydraulic setup? I've driven a G50 and a 915, and the pedal felt no better in the G50 car.

[s5uewf]

Never have to adjust it, lubricate it, and the cable will never break are a few advantages. Possibly smoother engagement, as well.

On the downside you will have to rebuild the slave cylinder at some point, have to change fluid, have to bleed system, and it may weigh more (not sure).

[Uwon]

Originally Posted by s5uewf

Never have to adjust it, lubricate it, and the cable will never break are a few advantages. Possibly smoother engagement, as well.

On the downside you will have to rebuild the slave cylinder at some point, have to change fluid, have to bleed system, and it may weigh more (not sure).

That about sums it up. My last clutch cable must have lasted at least 17 years..............can't remember further back.

Johan

[ficke]

Originally Posted by Tremelune

What's the value in a hydraulic setup? I've driven a G50 and a 915, and the pedal felt no better in the G50 car.

The tube in my tunnel has a grove worn in it from running a Porsche 930 'sport' clutch in the car for over 84,000 miles so now the clutch action is notchy and very heavy, I have bent the clutch pedal to disengage the clutch over time.
One big culprit was the guide tube for the clutch release bearing had a notch worn in it. I have rebuilt pedal assy., change every thing I can. The guide tube in the tunnel is the only thing left.
Instead of replacing the tube in the tunnel and having having to buy the expensive Ruf clutch cables required for their transmission I am gong to go hydraulic and eliminate all that mess.
I would think if you run stock or mild pressure plates and have a stock transmission and your car does not have that many miles on it, there would be little need to go hydraulic clutch linkage.

[ficke]

I converted my 78 930 to a hydraulic linkage. I used the op mentioned vender for the slave setup and went with a 87-89 pedal assy.
I ran the hydraulic line through the old cable tube in the tunnel and there for did not have to drill any holes.
I used a 65-67 Porsche 911 master cylinder fluid reservoir.
There were some brake line adapter issues that I sourced through a hot rod VW supplier.
All in all not a big job but time consuming running around for the parts. and not that inexpensive.
But, now no more mechanical friction, just spring effort of the pressure plate and no more Ruf cables.

[s5uewf]

sweet! where did you mount your master cylinder - on the back of the pedal assembly? Couldn't tell from the photos, where the pedal is connected to the hydraulics. Sounds like you did not need to go through the front firewall/frunk wall?

[TurboKraft]

See that master cylinder right on the pedal box in the post above? ;-)
All-stock G50 pedal assembly.
Direct bolt-in replacement for 1978- 911/930 (cars with power brake booster).

[s5uewf]

yah, I couldn't tell if that tiny thing was the MC. I like the install for any situation where the cable is no longer feasible (worn out tube, etc.).

Chris - check your info@ box at the office sometime. I sent you a note.

[ficke]

Originally Posted by s5uewf

That looks cool!
I had not seen this before.

I would imagine the easiest thing to do would be to install a pedal assembly and master cylinder from a G50 (1987?, 1988, 1989) model year. Just guessing though I would think it would be pretty easy to install. Then run a line back to the slave cylinder.

That is what I did, pretty much bolt on.
I was particularly happy to be able to run the hydraulic line through the cable tube in the tub. So no drilling the car. 70" line did it.
And you were right about the smoother engagement.
Maybe this picture will be easier to see the MC

[s5uewf]

thx!

[VZ935]

I ran the same one in this car as Ficke ran . That is my spare just in case that I never had to use. Unfortunately in the mock up photo of the upside down 930 box the slave cylinder is not set up yet .

I found it to be reliable and nice