thinfourth Posted February 27, 2005 Share Posted February 27, 2005 Okay i am looking at fitting new rear discs soon since i will be getting brand news pads etc. However they are pretty meaty things thickness wise is there any reason i can just machine down the thickness to about the minimum and save a wee bit of wieght. Sod the heater wheres my shades Link to comment Share on other sites More sharing options...
stevefoster Posted February 27, 2005 Share Posted February 27, 2005 Rear discs = Front disks on standard brakes. New thickness is 10.16mm = 0.400" Min thickness is 8.3mm = 0.327". AP vented Front disc 18 mm thick new replaced at 16.4mm Hants (North) and Berkshire Area club site here My racing info site here Link to comment Share on other sites More sharing options...
Chelspeed Posted February 27, 2005 Share Posted February 27, 2005 No reason at all. For more weight saving get them crossdrilled that'll save some more. For even more radical saving get some big (1 inch or so) holes in the hubs between the stud holes and in the radial bit of the bell if it's deep enough. Link to comment Share on other sites More sharing options...
Paul D Jones Posted February 27, 2005 Share Posted February 27, 2005 Fluke motorsport have been doing these lightened discs for Westfields for a couple of years Ring Graeme and ask if he does them for Caterhams There is no need for vented discs on such a light car Paul. See My Car Here Link to comment Share on other sites More sharing options...
Joe 90 Posted February 27, 2005 Share Posted February 27, 2005 In my experience, disks lose feel and bite as they get thinner, but that could just be to with them getting older. Cross drilling is probably a better bet. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan Link to comment Share on other sites More sharing options...
Paul D Jones Posted February 27, 2005 Share Posted February 27, 2005 "In my experience, disks lose feel and bite as they get thinner" More likly to be disc run out Link to comment Share on other sites More sharing options...
Joe 90 Posted February 27, 2005 Share Posted February 27, 2005 Nope, even with no runout at all. SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan Link to comment Share on other sites More sharing options...
Chelspeed Posted February 28, 2005 Share Posted February 28, 2005 Can't think of any theoretical reason why thin discs should perform any different from thick discs assuming calipers are designed to cope with this thickness of disc (except for heat soak type reasons of course). You're probably right that it's an age thing, by the time discs get thin on a road car the calipers, master cylinders, pads, wheel bearings, shockers are also well past their best. Link to comment Share on other sites More sharing options...
Joe 90 Posted February 28, 2005 Share Posted February 28, 2005 Me niether. I think it falls in the catagory of "In theory there is no difference between theory and practice...." SEP field working, not spotted in 103,100 miles. Some photos on webshots, updated 25 Jan Link to comment Share on other sites More sharing options...
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