Harley Posted April 28, 2006 Report Share Posted April 28, 2006 I have genuine ex works vented discs with the alloy bells on the front of the TR7 V8 I have been building (for a very long time!) and had built up some old princess calipers with spacers for them as I couldn't find any of the genuine AP alloy 4 pots. The princess calipers really need new pistons and seals which looks like costing > £100 questions: Anybody have or know where to find the AP calipers - is this worth doing? Has any up to date 4 pot alternative been found from any other car? Where is the best place to find seals etc for princess calipers. I cannot exchange them as I have ground them down on the outside. Any other suggestions on brake caliper solutions. Is the rover SD1 master cylinder and servo still the preferred option for brake upgrades? I also have a 4HA fitted with disc brakes at ehe rear. Les Quote Link to post Share on other sites
Cinnobar Posted April 28, 2006 Report Share Posted April 28, 2006 I have genuine ex works vented discs with the alloy bells on the front of the TR7 V8 I have been building (for a very long time!) and had built up some old princess calipers with spacers for them as I couldn't find any of the genuine AP alloy 4 pots.The princess calipers really need new pistons and seals which looks like costing > £100 questions: Anybody have or know where to find the AP calipers - is this worth doing? Has any up to date 4 pot alternative been found from any other car? Where is the best place to find seals etc for princess calipers. I cannot exchange them as I have ground them down on the outside. Any other suggestions on brake caliper solutions. Is the rover SD1 master cylinder and servo still the preferred option for brake upgrades? I also have a 4HA fitted with disc brakes at ehe rear. Les Option on Prinny calipers is the Wilwood ones, I'm personally not keen as I've heard of a few have probelms but it's your call. The other option is either Volvo 240 or Toyota pick up, both popular with the sceptics & the Oz guys. Recon Prinny calipers are about & it's cheaper to get a specialist to rebuild them than you can yourself.They'll do yours if you've modded them. I did my own but the pistons were fine after a polish off, the seals came from Robsport for around £16ish. My 944 runs lovely S2 brakes which are a very light alloy 4 pot built by Brembo for Porsche & available for not a lot. I think a pair will find itself on the front of my 7 when I rebuild the front end again. Yup master cyl is either Sherpa twin wheel or SD1. Quote Link to post Share on other sites
frankman Posted May 1, 2006 Report Share Posted May 1, 2006 (edited) Hi Cinnobar Just look for some Escort and Capri stuff also the MG TF (F - Generation) uses some AP 7600 / 304mm Disc and this have the same bolt on distance about 82,55mm witch is like old Ford and Lotus and Princess some TVR .. I've got a set MG TF from england to try .. will know more some time .. oh by the way the MG Maestro/Montego and MGF and Lotuse elise S1 have the same PCD 95.25mm (3,75") Gree from Switzerland Edited May 1, 2006 by frankman Quote Link to post Share on other sites
Harley Posted May 2, 2006 Author Report Share Posted May 2, 2006 Hi Cinnobar Just look for some Escort and Capri stuff also the MG TF (F - Generation) uses some AP 7600 / 304mm Disc and this have the same bolt on distance about 82,55mm witch is like old Ford and Lotus and Princess some TVR .. I've got a set MG TF from england to try .. will know more some time .. oh by the way the MG Maestro/Montego and MGF and Lotuse elise S1 have the same PCD 95.25mm (3,75") Gree from Switzerland Hi Cinnobar Just look for some Escort and Capri stuff also the MG TF (F - Generation) uses some AP 7600 / 304mm Disc and this have the same bolt on distance about 82,55mm witch is like old Ford and Lotus and Princess some TVR .. I've got a set MG TF from england to try .. will know more some time .. oh by the way the MG Maestro/Montego and MGF and Lotuse elise S1 have the same PCD 95.25mm (3,75") Gree from Switzerland Gree Are you saying that the MG TF calipers are 4 pot and will fit the TR7? Does the TF have a vented disc as well. Les Quote Link to post Share on other sites
Cinnobar Posted May 2, 2006 Report Share Posted May 2, 2006 (edited) looks like Gree could be right, have a look here http://tinyurl.com/fo94m You'd need 15" wheels which I now have, funny enough off an MGF Only bit I don't like is the price the 944 s2 Brembos are about £ 80 a pair! Oh & having to file off MG! Edited May 2, 2006 by Cinnobar Quote Link to post Share on other sites
andrewt Posted May 3, 2006 Report Share Posted May 3, 2006 (edited) Hi Les I bought new AP calipers from Questmead for mine, as my original competition AP calipers were beyond economic repair. Alan Brown at questmead can get all the AP stuff that is still available, so he may be worth a try, also i believe he has a pet brake workshop he uses. the caliper is different, but is the same piston sizes, uses the same pad etc. The only snag is you need a pet machine shop to drill the mounting holes as the lugs come blank. they are very effective and normally quieter than the old CP2361 competition caliper. http://www.questmead.co.uk/ I am using the SD1 master cylinder. the best one is hard to come by now. i managed to get a new one for sensible money (by luck from Brakes International http://www.brakesint.co.uk/ ) they had new old stock that i negotiated a special deal on. You need a 3 or 4mm spacer between the servo & cylinder to accomodate the different push rod lengths, but as long as this seals the vacuum it's no problem to make. they also put me in touch with a firm that does redress kits for old brake stuff. They had an SD1 redress kit for tiny money compared to the hundreds normally charged. They might be a source of pistons & seals. http://www.classic-brakes.co.uk/ Cheers Andy. Edited May 3, 2006 by andrewt Quote Link to post Share on other sites
Harley Posted May 11, 2006 Author Report Share Posted May 11, 2006 Andrew Thanks for the info. I measured my existing 'works' discs last night and they are only 270-280mm in diameter so based on the previous post about 304mm discs I assume they will be too small for the MGF calipers. I will have to see if I can find bigger discs to match the ally bells I have. Do you know anythiing about sourcing a disc to match these adaptors? Les Quote Link to post Share on other sites
andrewt Posted May 12, 2006 Report Share Posted May 12, 2006 Les Questmead would be the guys as they are AP specialists. If you let them know the number of bolts, the existing disc size & what you would like, they will be best placed to help. From memory our discs are 10.5" x 3/4" wide Group 4 Forest discs, the same as Mk2 Escorts etc use.... Andy Quote Link to post Share on other sites
frankman Posted October 11, 2006 Report Share Posted October 11, 2006 (edited) Hello together and sorry for my delay in coming back ... so the MG-TF Calipers can fit but you need to drill the thread from the track arm out because the MG-AP7600 Calipers have already a thread and will be bolted in front of the track arm (stub axle) so you bolt them through the axle in the Calipers (in contrast to the original calipers) the calipers have 80mm bolt dist - but you will need 16" Wheel !! The TF- Disc "304mm" need to be rebored because the original PCD of 95.25mm should be 86.5mm for the Hub The funny thing is that the Caliper - Disc position seems like original !! make your own measurements.. http://cgi.ebay.de/ROVER-MG-MGF-TF-AP-Raci...1QQcmdZViewItem please look at for Dimension: http://www.brembo.com/CatalogoBrembo/Templ...T=NoModifyGuest If you use Princess (concrete) 4pot Calipers you could use some Escort Turbo Disc and rebore with no "Donuts" look also at the Brembo link above!! - the good thing about the Princess Caliper they look old like original :- So and if you are for bolt on there is a company ..http://www.compbrake.co.uk/Triumph%20Upright.htm Greetings Frank Edited October 11, 2006 by frankman Quote Link to post Share on other sites
grndsm Posted November 6, 2006 Report Share Posted November 6, 2006 The TF- Disc "304mm" need to be rebored because the original PCD of 95.25mm should be 86.5mm for the Hub Can you elaborate on what car this is? How thick are they? I am looking for 300-330mm disc for my brake upgrade. So far, everything that I have found has too large of the center hole... I can deal with it, if I have to, but first, I want to see if I can find something "off the shelf". Quote Link to post Share on other sites
frankman Posted November 11, 2006 Report Share Posted November 11, 2006 Can you elaborate on what car this is? How thick are they? I am looking for 300-330mm disc for my brake upgrade. So far, everything that I have found has too large of the center hole... I can deal with it, if I have to, but first, I want to see if I can find something "off the shelf". Hi grndsm this are Rover MG TF (160BHP) Brake disk .. Quote Link to post Share on other sites
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.