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Post by redsunbeam on Aug 25, 2012 8:16:07 GMT
PSSSSTTT ROY - look what the nice postie person brought me to go on the front of the old girl this week .......................  |
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Post by redsunbeam on Aug 26, 2012 15:08:11 GMT
I machined the discs to fit the front hubs 'et voila' BIG BRAKES.   Just need to fab the bracket to carry the calipers. Total cost £140. |
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Post by petrolhead allan on Aug 27, 2012 9:44:57 GMT
I like it! What car(s) are the discs and calipers from?
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Post by Roy of the Rovers on Aug 27, 2012 15:44:59 GMT
Oh.... that is GOOOOOOOD!! I need to leave the room
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Post by petrolhead allan on Aug 30, 2012 16:53:21 GMT
Will you be letting us know to which car(s) the discs and calipers were originally fitted, or are you teasing us?
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Post by redsunbeam on Mar 25, 2014 11:53:12 GMT
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Post by Roy of the Rovers on Mar 25, 2014 13:03:12 GMT
More!  |
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STOPPING
Mar 25, 2014 23:32:30 GMT
via mobile
Post by enigmas on Mar 25, 2014 23:32:30 GMT
Looks good to me. Finding a disc with a low hat is the secret. Certainly looks to be a lot less work than my setup. There's no comparison between the vented and the solid discs...the braking is so much more effective and predictable. You can actually feel the pads 'bite-in'. I'll be interested to see how you resolve the caliper mount. Have you allowed for (sliding) movement of the caliper head as the disc pads wear. You need the sliding pins (on the caliper head) to be fully retracted with fresh pads. Consider this before you establish the caliper mount. PBR Sliding Head CaliperFitted PBR Caliper |
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Post by Kev on Mar 26, 2014 17:32:01 GMT
Oh My....I need these, please make up a kit so us less able can enjoy more modern stopping. I love a modification. Big Kev. |
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Post by Roy of the Rovers on Apr 2, 2014 11:38:53 GMT
Which Jag discs and calipers are they from?? Did the caliper bolt up to the carrier OK or is that modded too?
thanks
Roy
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Post by redsunbeam on Apr 3, 2014 0:37:30 GMT
Which Jag discs and calipers are they from?? Did the caliper bolt up to the carrier OK or is that modded too? thanks Roy The discs and calipers are 2001 s type. I had to make an adapter plate to mount the new caliper onto the old mount. I've just machined the rear discs so when I get the pictures from that loaded up I'll put the detail on the front brakes on at the same time. |
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Post by Roy of the Rovers on Apr 3, 2014 11:19:12 GMT
Cant wait  |
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Post by redsunbeam on Apr 5, 2014 13:16:11 GMT
Lets stick a bit more detail into this, Choosing discs.
The discs needed to fit inside the wheels in both diameter and offset. The disc offset would dictate the caliper mount position, this had to be taken into consideration. If the old and new mounts were only a few mm apart it would be more difficult to make a strong adapter plate. They needed to be vented. ( no point in the swap if there was no gain in feel / performance ) The centre bore had to be the same or smaller than the rover hub so they could be machined out to fit. Had to be 5 stud mounting. With all this in mind i went to the local motor factors and came away with a 2 year old copy of a brake catalogue. Many hours later i found a disc with the righth dimensions. A quick check on the Brembo website which has some good detailed drawings confirmed that 2001 S type Jaaaag discs would fit the bill. I then got carried away and ordered drilled and grooved ones. Which look like this........ The car was in use at the time so i bought a pair of front hubs to use for mocking up and a pair of Jaaaaag calipers and carriers. First job was to machine out the centre bore of the discs to match the rover hub and redrilll the mounting holes using an old disc as a template. Which looks like this on the hub. The smaller holes are the new ones.  |
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Post by redsunbeam on Apr 5, 2014 14:13:39 GMT
So now we have to mount the caliper and carrier, The disc is 30mm thick and the gap in the carrier is 34mm,  Giving 2mm clearance each side. So with some 2mm shims between the disc and carrier,   We now have a good idea of the gap we have to fill with an adapter plate. The plate is 20mm thick, made up of 2x 10mm plates. After lots of drilling, wittling and filing we have,  Which mount thus once the dust shield has had a small piece cut out to allow for the adapter,  and,  Overhaul calipers, give them a lick of paint too, add some custom braided brake lines and put the kettle on.  JOB DONE.  Oh, and do the other side!  |
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Post by Roy of the Rovers on Apr 7, 2014 12:26:43 GMT
Great, thanks for an update. Mind if I 'borrow' it for the club mag?
How have you found the brake pedal? Does it push further to fill up the calipers or do the new caliper pistons use a similar amount of fluid? When I converted my manta from solid disc sliding caliper to vented disc twin caliper I had to replace the master cylinder as well to keep the pedal feel 'up there' !
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Post by redsunbeam on Apr 7, 2014 13:22:11 GMT
Help yourself to it Roy, although one thing that i havent mentioned is that these brakes will not fit under Rostyles. I run 17" alloy wheels so it wont be much use to most people in the club.
The brake pedal feels nice and progressive with just a little more travel. The volume of the Jag calipers is not far from the Rover ones. I wasnt overly worried by it because the rear discs and calipers will be from the same jag eventually, and i will also use the Jag master cylinder and servo too to give me dual circuit brakes.
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Post by Roy of the Rovers on Apr 7, 2014 15:08:01 GMT
Yeah I've got the 5 spoke Jeep Grand cherokees at 17" too. A very useful how to!The principle is the same and hopefully will inspire others  Thanks again.. |
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Post by tootle on Nov 29, 2016 0:57:43 GMT
Are you guys running the 17X7.5s? How are they for clearance? What offset? Spacers? What's the clearance like? Any chance of pictures?
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Post by enigmas on Nov 29, 2016 4:27:52 GMT
Here are the drawings (below) I used on my coupe to upgrade the front brakes. This layout will fit under standard 15" rostyle wheels or solid 3 litre wheels. The discs are from a Mitsubishi Magna V6 Station wagon (1991-96 TR-TS. 10 3/4" dia. 24mm thick. 20 mm hat.) You will need to be skilled with a lathe or have the adaptors made professionally. If you use these drawings, specifications and details, the onus is on you as the individual as to the outcome. I have placed the information here purely for discussion purposes.        NB. The caliper is a sliding head 'cast iron' type made by PBR (1971-76.) If you're in OZ, it was fitted to HG-HJ V8 Holdens of the 70s. I chose this caliper and mount as it is common and fitted to cars with big sixes and V8s. (253, 308, 350ci) These cars are still used in historic racing. Pads are still readily available in various specs. Note the caliper mount. One hole needs to be welded closed and then redrilled a 1/16" further out from recollection. Pad thickness: .350" Braking Area: 9.670 sq. inches per pad. Piston bore dia. 2.50" (63mm) * The discs were obtained new from DBA in undrilled condition. Slotted and drilled discs can be ordered. |
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