Mike Biddle Posted March 25, 2007 Share Posted March 25, 2007 The RST came with a 7.25 superclutch with organic plates and concentric slave cylinder. It would appear that this device is somewhat inadequate when it comes to reining in all those horses, so need to sort out a different one ready for the summer. Have pretty much decided on a 7.25 cerametallic, but would apreciate views on manufacturers. Also decided that a better quality slave cylinder is required. So which breed should i buy? i saw the Tilton during Autosport and it looked like very high quality stuff albeit more expensive (not an issue), otherwise AP? Thanks, Mike. Link to comment Share on other sites More sharing options...
F355GTS Posted March 25, 2007 Share Posted March 25, 2007 Mike i'm runnign a 7 1/4 twin plate Superclutch wth metal (rally spec) plates, it's tough and has definitely stood some serious abuse whilst retaining a large element of driveability at low speeds, manouvering. I previously had hte Organic plates an cooked them! I recently tried an AP twin plate cerammetallic and it was somewhat agressive compared to the above Mark Link to comment Share on other sites More sharing options...
ECR Posted March 26, 2007 Share Posted March 26, 2007 My experience is as follows (generalising): Sintered: Like a light switch either on or off - race use only Organic: relatively gentle takeup but does not last with high power Cerametallic: Lasts well and is the best compromise for high power road and track. This is what I am running. The plate (AP) was re lined when finally worn at a very sensible price by Questmead Edited by - ECR on 26 Mar 2007 10:07:47 Link to comment Share on other sites More sharing options...
Alex Wong1697456877 Posted March 26, 2007 Share Posted March 26, 2007 My humble 240BHP Vx set fire (literally) to a set of QM organic plates. They were not very durable at all. So far so good with the rally plates but with your level of power, I'd maybe talk to QM or Tilton and see what they suggest. Edited by - Alex Wong on 26 Mar 2007 10:23:03 Link to comment Share on other sites More sharing options...
Mike Biddle Posted March 26, 2007 Author Share Posted March 26, 2007 Mark, thanks for the info, i did run a 5.5 sitered clutch with the old VX motor and had to mess with the pedal to master cylinder ratio by weldin in a pivot and two levers in order to make it in any way usable, but that of course was on a 5.5 unit and a 7.25 with softer springs could well be very different, and in any case this time round a smaller master cylinder has been fitted to change the ratio, and that has made a very big difference in pedal effort, travel, and "feel" I'll bear it in mind. Alex, I have talked to AP and Tilton, they both suggest a cerametallic unit with the appropriate cover springs to handle the torque, and thats what makes for a heavy pedal. Fortunately I don't have an overdose of torque, so it should be ok given the smaller master cylinder. Probably not too much more torque than your VX actually. When you say "rally plates" are they cerametallic or sintered? Link to comment Share on other sites More sharing options...
Alex Wong1697456877 Posted March 26, 2007 Share Posted March 26, 2007 I don't know - the Quartermaster catalogue just refers to them as Rally plates. I believe Marius found these wore out pretty quickly too but mine have proved to be a great improvement over the organic plates. The clutch is a Quartermaster 7.25 twin plate V-drive. I'm guessing they are cerametallic. In use, they are only slightly more aggressive than the organic plates. If I was starting from new, I think I'd go for a Tilton one. Can't justify that any further than gut feeling though. Edited by - Alex Wong on 26 Mar 2007 12:15:12 Link to comment Share on other sites More sharing options...
Mike Biddle Posted March 26, 2007 Author Share Posted March 26, 2007 Thanks Alex, I can find out from that info. Incidentaly the car will be living at our Halesowen facility for the summer, maybe we could go for a blat sometime when I'm over there? Mike. Link to comment Share on other sites More sharing options...
Alex Wong1697456877 Posted March 26, 2007 Share Posted March 26, 2007 Good idea - let me know when you're around. Link to comment Share on other sites More sharing options...
Peter Carmichael Posted March 26, 2007 Share Posted March 26, 2007 Mike, I've designed a slave cylinder that has an appropriate ratio. I can dig out the drawings if you like. My 1st prototype has been running in my car for ... let me see now... seven years. 😬 Link to comment Share on other sites More sharing options...
Mike Biddle Posted March 26, 2007 Author Share Posted March 26, 2007 Thanks Peter, I would really apreciate that. I assume your slave works with the standard master cylinder? Getting it made is not a problem. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now