Rick W Posted November 5, 2004 Share Posted November 5, 2004 I've got a vvc engine and therefore have a hydraulic clutch. I believe vvc cars have to go down this route 'cos the vvc mechs take up too much space to allow a cable system. However I'm planning a winter upgrade. If I go down the solid cam route (via DVA of course) and lose the vvc mechs does that mean I could swap to a cable clutch? Are there any benefits to this? Or is the vvc casing retained and therefore the hydraulic system? Link to comment Share on other sites More sharing options...
Normans_Ghost Posted November 5, 2004 Share Posted November 5, 2004 Why would you want to change from hydraulic to cable when everyone else spends fotunes (well a few quid) going the opposite way. Keep the hydraulics. Just for the record, I fitted hydraulics after the 3rd cable broke in 18 months. That was 10 years ago and I've never thought about it since. Norman Verona, 1989 BDR 220bhp, Mem No 2166, the full story here Link to comment Share on other sites More sharing options...
Chelspeed Posted November 5, 2004 Share Posted November 5, 2004 When you say hydraulic I assume you mean a slave cylinder bolted on somehwere outside the bellhousing working the same release arm as the cable? If so then the best thing to do is to change to a hydraulic system with concentric release bearing fitted on the gearbox nose and carrying the release bearing directly. This does away with the fabricated release arm completely (potential failure point, and very expensive) and improves the geometry of the release bearing travel. Link to comment Share on other sites More sharing options...
Rick W Posted November 5, 2004 Author Share Posted November 5, 2004 Thanks, Norman, I wasn't so much saying I wanted to go that route - it was just that just about every other K engined car seems to have a cable clutch and I assumed there was some benefit- so grateful for you to clarify the point. Chelspeed, that sounds interesting. Given that my crb is alreading whinging at the 4.5k stage I'd like a more reliable mech. What is the concentric bearing from and where do I get one? Have many folks gone down this route? Link to comment Share on other sites More sharing options...
Normans_Ghost Posted November 5, 2004 Share Posted November 5, 2004 Rick, I've got a concentric crb. Worth having but unless someone comes up with a ready made kit you will have to configure the spacings yourselves. I'm sure someone will know who supplies a kit for K's. Not susre it will save crb's though, I think crb failure is to do with pre-load. Norman Verona, 1989 BDR 220bhp, Mem No 2166, the full story here Link to comment Share on other sites More sharing options...
Chelspeed Posted November 5, 2004 Share Posted November 5, 2004 The concentric slave cylinders are made by a few people, standard on saabs of some kind. Now made specially for motorsport by titan I think. Available from Burtons, Demon Tweeks, SBD etc etc. The one I've got is very similar to item 3 at the bottom of page 252 in the current Demon Tweeks catalogue if you have one. Bolts directly onto the front of the gearbox in place of what I call the trumpet, the round plate with a seal in with the metal sleeve that the release bearing slides on. Link to comment Share on other sites More sharing options...
Joe 90 Posted November 5, 2004 Share Posted November 5, 2004 The only advantage of cables is that they are cheap. Stick with hydraulic. SEP field working, not spotted in 102,900 miles. Some photos on webshots, updated 21 Sept Link to comment Share on other sites More sharing options...
Mike Biddle Posted November 5, 2004 Share Posted November 5, 2004 Ford now have a concentric slave cylinder. Raceline are using it, so you could get it from them. Link to comment Share on other sites More sharing options...
ECR Posted November 5, 2004 Share Posted November 5, 2004 I have a concentric hydraulic clutch and in the interests of balance I would point out that seals wear and need replacing, and when they do it's engine out time, wheras when a clutch cable breaks..... Link to comment Share on other sites More sharing options...
harold Posted November 5, 2004 Share Posted November 5, 2004 ECR, clarify please , do you mean seals in slave cylinder ? mine has been in and out several times during build [slave i mean] dificult i grant but no real problem ? 1800 v v c Link to comment Share on other sites More sharing options...
ECR Posted November 6, 2004 Share Posted November 6, 2004 Yes, slave cylinder seals. for which the engine needs to be pulled out. Although this is not particularly difficult (if you are confident with spanners) it does take significantly longer than replacing a clutch cable (and is not usualy practical on a track day or at the side of the road !) Link to comment Share on other sites More sharing options...
Chelspeed Posted November 6, 2004 Share Posted November 6, 2004 Harold - I think the VVC slave is an external slave that works the bearing via a release arm if so then no real problem to get to it. ECR is talking about a concentric release bearing inside the bellhousing, hence engine out ot get to it. Link to comment Share on other sites More sharing options...
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