benkei Posted July 10, 2010 Share Posted July 10, 2010 When upgrading j-spec to UK sized brakes, are the calipers, discs and pads all that need changing, along with some braided hoses? Or does the master cylinder need upgrading too? Are j-spec ones the same size as UK? I know when upgrading to EK9 or DC2 brakes on vti Civics the master cylinder can't cope with the extra size, so an EK9 or DC2 one is needed. Is this the same case? Quote Link to comment Share on other sites More sharing options...
bignum Posted July 11, 2010 Share Posted July 11, 2010 The uk master is bigger so to do a proper job this would need replacing to, saying that ive driven a couple of cars with uk brakes and the small master and they felt fine. Quote Link to comment Share on other sites More sharing options...
benkei Posted July 13, 2010 Author Share Posted July 13, 2010 Is there much of a size difference? Quote Link to comment Share on other sites More sharing options...
Terminator Posted July 13, 2010 Share Posted July 13, 2010 The difference is small. I have a JDM master cylinder and have been using UK brakes for many years, with out a problem. I believe the general consensus is it is not worth the agro of trying to fit the UK master cylinder. I read somewhere that there are different slaves available which will improve braking, which are much easier to change. Quote Link to comment Share on other sites More sharing options...
imi Posted July 13, 2010 Share Posted July 13, 2010 Is there much of a size difference? 2mm IIRC. Couldnt tell any difference in real life driving maybe on track it might be noticeable. Quote Link to comment Share on other sites More sharing options...
bignum Posted July 13, 2010 Share Posted July 13, 2010 The cars i drove were on track pushing the brakes, felt good. Quote Link to comment Share on other sites More sharing options...
benkei Posted July 13, 2010 Author Share Posted July 13, 2010 So would you concider a Supra having J-spec brakes a small issue? I remember reading through some threads on here that to upgrade to UK spec brakes it costs around £1500 front and back, that makes me want to find one with the larger brakes in the first place. Just weighing up the cost of different Supras, some with the larger brakes and some not. I worry a lot, so I'd always be concerned that the J-spec master cylinder wouldn't be able to use the larger brakes properly... Quote Link to comment Share on other sites More sharing options...
ipswichsupra Posted July 13, 2010 Share Posted July 13, 2010 anyone tried fitting celica gt4 st205 calipers? as i now have gt4 and believe calipers to bve the same apart from the fact that they say celica? they go for 150 for all for onm ebay occasionally Quote Link to comment Share on other sites More sharing options...
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