TheMantaKeed Posted November 25, 2013 Share Posted November 25, 2013 Hi, I've read all the posts on the big brake conversions and there seems to be some conflicting advice, so before I actually buy the parts listed below, can somebody confirm that everything will be a bolt on job? (I know the discs need to have the bolt holes re-drilled and the centre spigot hole enlarged) Sierra XR4x4 260mm vented front discs. MK3 Cavalier SRI front calipers (sliding type) I know I could use Audi discs, but there is a good deal on Ebay for drilled and grooved XR4x4 discs- (£58 for a pair), Thanks in advance, Nick. Quote Link to comment Share on other sites More sharing options...
simon p Posted November 25, 2013 Share Posted November 25, 2013 Lots of information about brakes in the members section 1 Quote Link to comment Share on other sites More sharing options...
mantasrme Posted November 26, 2013 Share Posted November 26, 2013 Don't think xr4x4 discs are quite right, from memory the offset of the disc isn't 56.1mm like the manta So the braking surface will be out of line in the caliper/carrier and could even touch the side of the carrier depending how far off that they are. Sierra's ran several different disc offsets/heights on different versions. The Rwd sierra Cosworth has the right offset, but that has 283mm discs so you need larger calipers and wheels, but don't think any of the others did Also as Simon P says there are more posts in the members section on brakes, and a lot of other useful things Quote Link to comment Share on other sites More sharing options...
paulgsi Posted November 26, 2013 Share Posted November 26, 2013 im running sierra cosworth 2wd front discs and callipers off a calibra v6 or turbo i think the bigger engined vectras had them too cant fault my brakes Quote Link to comment Share on other sites More sharing options...
TheMantaKeed Posted November 27, 2013 Author Share Posted November 27, 2013 im running sierra cosworth 2wd front discs and callipers off a calibra v6 or turbo i think the bigger engined vectras had them too cant fault my brakes Thanks Paul, I take it you're running 15" wheels ? I want to keep my stock 14" Ronals. Quote Link to comment Share on other sites More sharing options...
rutts Posted November 27, 2013 Share Posted November 27, 2013 audi discs and 16v calipers it is then . Quote Link to comment Share on other sites More sharing options...
TheMantaKeed Posted November 27, 2013 Author Share Posted November 27, 2013 (edited) audi discs and 16v calipers it is then . I know I can go this route, but the XR4x4 discs are that liitle bit bigger than the Audi ones and very reasonably for drilled and grooved discs . I found this information on a previous post made by :- '399Road' (Luke) here is the original thread:- http://forums.mantaclub.org/topic/27986-top-mods-for-manta-b/?hl=%2Bbrake+%2Bconversion and his post below :-" Hello Mark, If I had an 87 Exclusive, I'd say the first modification would be to uprate the front brakes. My 87 GTE coupe ran 260mm Sierra xr4x4 front discs( redrilled to fit ) with mk3 Cavalier SRI brake calipers. This transformed the cars pathetic standard braking and still fitted under the 14" wheels." I have contacted Luke, but have no reply yet.. Has anybody else gone this route instead of the Audi discs ? Thanks, Nick. Edited November 27, 2013 by TheMantaKeed Quote Link to comment Share on other sites More sharing options...
rutts Posted November 27, 2013 Share Posted November 27, 2013 Audi discs are 256mm so loosing 4mm is not that bad a deal. Lopk for audi discs on ebay mtec do grooved drilled discs for good price. Recon calipers for 16v are £45 EACH at brakes international. Ferodo ds11pads and job done. Quote Link to comment Share on other sites More sharing options...
TheMantaKeed Posted November 27, 2013 Author Share Posted November 27, 2013 Audi discs are 256mm so loosing 4mm is not that bad a deal. Lopk for audi discs on ebay mtec do grooved drilled discs for good price. Recon calipers for 16v are £45 EACH at brakes international. Ferodo ds11pads and job done. Is the 16v calipers a 52 mm or 54mm piston ?, both options are listed on brake internationals website, Thanks, Nick. Quote Link to comment Share on other sites More sharing options...
mantasrme Posted November 27, 2013 Share Posted November 27, 2013 Think that is calipers only from brakes int (you need carriers as well) and there is a surcharge if you don't have old ones to exchange. Also re the xr4x4 discs being bigger, they are but the caliper will sit in the same position no matter the disc so they actually won't be any better. Quote Link to comment Share on other sites More sharing options...
rutts Posted November 27, 2013 Share Posted November 27, 2013 Yes correct david. Carriers needed from originals. Mine where 54mm but can measure tomorrow to check. . I have a spare pair of carriers. Quote Link to comment Share on other sites More sharing options...
bones Posted November 27, 2013 Share Posted November 27, 2013 Audi discs are 256mm so loosing 4mm is not that bad a deal. Lopk for audi discs on ebay mtec do grooved drilled discs for good price. Recon calipers for 16v are £45 EACH at brakes international. Ferodo ds11pads and job done. I bought my Ally VW callipers brand new with pads from Compbrake £120 and I'm sure that was for the pair but you would have to get in contact with them to be sure. http://www.compbrake.com/brake-calipers/rear-caliper-with-built-in-handbrake-comp-r2.html Quote Link to comment Share on other sites More sharing options...
TheMantaKeed Posted November 27, 2013 Author Share Posted November 27, 2013 Yes correct david. Carriers needed from originals. Mine where 54mm but can measure tomorrow to check. . I have a spare pair of carriers. That would be helpful thanks, what do you want for the carriers ? Nick. Quote Link to comment Share on other sites More sharing options...
paulgsi Posted November 27, 2013 Share Posted November 27, 2013 ya im running 15 inch rims , but before i went to the 280mm set up i was rnning audi discs and 16v callipers and they were a great upgrade , standard brakes are shocking Quote Link to comment Share on other sites More sharing options...
rutts Posted November 28, 2013 Share Posted November 28, 2013 audi 80 2.3 have same disc off set but 282mm IIRC. but using the Vectra v6 (5 stud) callipers puts the flexi hose very close to springs when turning. using goodridge hoses (home made kit) and a different angled fitting can get away with this. my MOT man did not like the closeness of hose to spring so I also welded an extra 13mm steel block onto bottom arm to cut down lock to lock. Quote Link to comment Share on other sites More sharing options...
TheMantaKeed Posted November 28, 2013 Author Share Posted November 28, 2013 audi 80 2.3 have same disc off set but 282mm IIRC. but using the Vectra v6 (5 stud) callipers puts the flexi hose very close to springs when turning. using goodridge hoses (home made kit) and a different angled fitting can get away with this. my MOT man did not like the closeness of hose to spring so I also welded an extra 13mm steel block onto bottom arm to cut down lock to lock. Hi Rutts, Did you manage to get the measurement of the calipers, 52mm or 54mm? I also bought the Audi 80 discs, got a good deal for a pair of drilled and grooved vented for £40 for the pair, brand new. Nick. Quote Link to comment Share on other sites More sharing options...
rutts Posted November 28, 2013 Share Posted November 28, 2013 Will go unit tomorrow as on back shift this week. Quote Link to comment Share on other sites More sharing options...
rutts Posted November 28, 2013 Share Posted November 28, 2013 Will go unit tomorrow as on back shift this week. Quote Link to comment Share on other sites More sharing options...
TheMantaKeed Posted November 28, 2013 Author Share Posted November 28, 2013 Will go unit tomorrow as on back shift this week. Ok no worries, whenever you get a chance to look, Thanks, Nick. Quote Link to comment Share on other sites More sharing options...
rutts Posted November 29, 2013 Share Posted November 29, 2013 52mm size of pistons in calipers. will dig out carriers this weekend. Quote Link to comment Share on other sites More sharing options...
vernon Posted November 30, 2013 Share Posted November 30, 2013 So I am right in reading then that the Audi 2.3 discs are the ones to use with calibra turbo calipers , with some mods to the brake hose? Quote Link to comment Share on other sites More sharing options...
TheMantaKeed Posted November 30, 2013 Author Share Posted November 30, 2013 52mm size of pistons in calipers. will dig out carriers this weekend. Thanks Rutts, appreciate the info, let me know what you want for the carriers, Nick. Quote Link to comment Share on other sites More sharing options...
TheMantaKeed Posted December 6, 2013 Author Share Posted December 6, 2013 I've got the Mk3 Cavalier SRI 52mm calipers & Audi 80 256mm discs, I just need the carriers to finish the conversion. Nick. Quote Link to comment Share on other sites More sharing options...
rutts Posted December 8, 2013 Share Posted December 8, 2013 pm sent regarding carriers 1 Quote Link to comment Share on other sites More sharing options...
rutts Posted December 9, 2013 Share Posted December 9, 2013 On there way with myhermes parcel couriers. Let me know when they arrive. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.