F355GTS Posted April 22, 2002 Share Posted April 22, 2002 I fitted one a couple of weeks ago and all seemed well, car passed it's MOT etc. Did a trackday today and after about 6 or 7 laps the brakes stuck on!. Eventually traced it to the angle of the pushrod to the cylinder which was allowing the rod to wedge on the inside top edge of the cylinder and temporarily cured with a 13mm nut fitted between the mount and the pedal box plate on the top mounting Is this a known problem with any proper fix! Can't help feeling that the forces involved will cause the temporary fix to bend something! Mark Link to comment Share on other sites More sharing options...
Peter Carmichael Posted April 23, 2002 Share Posted April 23, 2002 Which pivot position do you have your pedals on? The more common problem is to adjust the pedal away from the driver to the point that the piston jams on the top of the pedal. The cure to this is to trim the offending amount from the end of the piston. Link to comment Share on other sites More sharing options...
F355GTS Posted April 23, 2002 Author Share Posted April 23, 2002 Peter It's on the middle one, did contemplate moving it to the further one but a) pedals are right for me b) don't think it would help enough I can probably make a fillet using Aluminium, egg box, washing up liq bottle, toilet roll centre and sticky tape in true Blue Peter style! Mark Link to comment Share on other sites More sharing options...
rgrigsby Posted April 23, 2002 Share Posted April 23, 2002 Mark, Doesn't sound so good, on another note how did the car handle with it's newly revised set-up? Cheers Rob G www.SpeedySeven.com Link to comment Share on other sites More sharing options...
EFA Posted April 23, 2002 Share Posted April 23, 2002 Mark, Sounds like you may have the clutch and brake pedals swapped around! On my car it all lines up straight! Fat Arn Visit the K2 RUM siteid=red> See the Lotus Seven Club 4 Counties Area Website hereid=green> Link to comment Share on other sites More sharing options...
F355GTS Posted April 23, 2002 Author Share Posted April 23, 2002 Rob It was much better until the tyres wore below their tread then loads of understeer!. Somebody else said that 32's do that and I can confirm it Arnie It definately stops when I press the middle one and I can make it go in gear with the one on the left!...... just kidding, I think I know what you mean I'll have a look tonight and see Mark Link to comment Share on other sites More sharing options...
F355GTS Posted April 23, 2002 Author Share Posted April 23, 2002 Right I've had a look and can see what you mean Arnie, the pickup for the clutch pedal is lower than that on the brake and therefore would overcome the problem I took some pics which are here http://www.collinsclan.co.uk/brakes/brakes.html If you get a minute I'd be grateful if you could take a look and see what you think, click on the thumbnail for a larger pic. The extra nut is still installed between the flange and the pedal box backplate so the angle looks fine at the moment Mark Edited by - F355GTS on 23 Apr 2002 20:50:39 Link to comment Share on other sites More sharing options...
captain chaos Posted April 24, 2002 Share Posted April 24, 2002 How much is the uprated M/Cyl? and do you have to buy it from Caterham? Link to comment Share on other sites More sharing options...
tbhall777 Posted April 24, 2002 Share Posted April 24, 2002 Just looked on their website. £157.05 + Vat. This is not an uprated master cylinder. It is simply a change of ratio. More effort, less travel. Less effort and more travel could also be considered to be uprated. Link to comment Share on other sites More sharing options...
captain chaos Posted April 24, 2002 Share Posted April 24, 2002 Thanks. Link to comment Share on other sites More sharing options...
Slipper man Posted April 24, 2002 Share Posted April 24, 2002 It's a bit more than that. It is much higher quality, meaning lower tolerances giving better feel etc as well. It is a big improvement. Link to comment Share on other sites More sharing options...
tbhall777 Posted April 24, 2002 Share Posted April 24, 2002 I agree, I have one fitted. Link to comment Share on other sites More sharing options...
EFA Posted April 24, 2002 Share Posted April 24, 2002 Its uprated......its lighter! Fat Arn Visit the K2 RUM siteid=red> See the Lotus Seven Club 4 Counties Area Website hereid=green> Link to comment Share on other sites More sharing options...
EFA Posted April 24, 2002 Share Posted April 24, 2002 Mark, I have the same pedal as you - i emailed you a pic. The distance from the fulrcum point cnetre to the clevis pin is 65mm Mine doesn't foul though. My only observation is that you are using the pedal position for persons with shorter legs, which exacerbates the problem. Perhaps if you adjust the pushrod and fit the pedal in the lanky legs postion you will be able to get things to work properly. Other than that there seems no obvious solution. I emailed you a pic of mine for reference. Fat Arn Visit the K2 RUM siteid=red> See the Lotus Seven Club 4 Counties Area Website hereid=green> Link to comment Share on other sites More sharing options...
EFA Posted April 24, 2002 Share Posted April 24, 2002 Thought I'd tell you twice! Edited by - fat arnie on 24 Apr 2002 23:19:38 Link to comment Share on other sites More sharing options...
F355GTS Posted April 25, 2002 Author Share Posted April 25, 2002 Thanks Arnie Mark Link to comment Share on other sites More sharing options...
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