Paul Dunstan
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R31 rear calliper kit - more available NOW!
Hi all. Continuing on from my front conversion I'm not looking at the rear. I intend to use R31 rear callipers and Audi 90 245mm solid rotors using a custom steel adaptor. This will bolt on the inside of the housing flange using the original mounting points for the bearing retainer. These will be manufactured from 8mm steel plate and fastened to the back of the axle housing flange using the original mounting points with longer bolts and nuts. Laser cut shims are also supplied to replace the original drum brake backing plate. <b>To fit this kit will require the axle flanges to be machined down to <u>134.80mm </u> to ensure a close fit of the hat over the flange. This wil ensure concentricity.</b> Current pricing for a pair (L & R) 8mm steel brackets laser cut (incl shims) and zinc plated. $160 incl postage.   
post edited by Paul Dunstan - 2018/04/04 14:14:43
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barney
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RE: R31 rear calliper kit - more available NOW!
2009/04/22 22:47:54
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im using them on a hilux diff with nissan maxima disc just gotta make up some brackets
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Paul Dunstan
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RE: R31 rear calliper kit - more available NOW!
2009/04/22 23:27:23
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Hi Barney.
Yes, there's a number of other options that all work but i thought I'd enquire non the less. This option is as simple as machining the axle hub to allow the "hat" to slide over, make the mount and it's done. Audi PCD is the same as the Escort.
The Hilux diff is another story regarding rotor fitment and PCD.
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MATTJ
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RE: R31 rear calliper kit - more available NOW!
2009/04/24 12:24:36
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hi paul id be interested in this setup for sure.. i have a set or R3 rear calipers in the shed alredy.. so would just need the adaptors and rotors id assume... what would this got for $$wise? 
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Paul Dunstan
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RE: R31 rear calliper kit - more available NOW!
2009/04/24 14:51:42
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Hi Matt.
Just waiting for a price for laser cutting and then some minor machining to achieve the correct offset.
Yes, the rotors are readily available and the machining of the axle flange should be a no problem 5 min job for any machine shop.
I will update this post when I have the final costs.
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Pansy
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RE: R31 rear calliper kit - more available NOW!
2009/04/24 18:16:04
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hi Paul, i've been thinking of doing this conversion, but don't have access to the machinery to perform. Let us know what sort of cost it will be. Very interested.
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Escortpower
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RE: R31 rear calliper kit - more available NOW!
2009/04/25 08:33:51
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Paul, the new and improved updated model looks more like a factory fit. I would be interested (depending on price) as I already have a pair of R31 calipers and access to a machine shop.
I'll keep watching your progress. Will they fit under 13" Rims?
Regards,
Craig.
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Paul Dunstan
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RE: R31 rear calliper kit - more available NOW!
2009/04/25 11:50:09
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Yes, the original design did not fit as nice as I had originally intended - hence the re-design.
I will need final numbers of orders to get an accurate price as the more I get cut the cheaper they become. I will get a general price for multiple items (5, 10 etc) as an indication.
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Paul Dunstan
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RE: R31 rear calliper kit - more available NOW!
2009/04/26 22:48:54
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quote:
Originally posted by Escortpower
Paul, the new and improved updated model looks more like a factory fit. I would be interested (depending on price) as I already have a pair of R31 calipers and access to a machine shop.
I'll keep watching your progress. Will they fit under 13" Rims?
Regards,
Craig.
Hi Craig - as they're a similar size to the OEM 247mm rotor I would expect the lower profile R31 calliper to fit under 13" wheels easily.
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Peril
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RE: R31 rear calliper kit - more available NOW!
2009/04/28 23:13:45
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Hi lads.
I have grafted a pair of discs (which have been re drilled to suit hilux stud) of the back of a VN SS commodore to a hilux diff. Had to make up some spacers to get the disc to run in the centre of the calliper. the actual calliper mount is the original off the commodore just with all the un nessisary crap cut off and the centre removed so as it would fit over the toyota diff housing.
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Paul Dunstan
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RE: R31 rear calliper kit - more available NOW!
2009/12/05 11:35:05
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Hi All.
I have updated the original post as the machine shop could not guarantee availability of my original alloy material. I will now be manufacturing from 8mm steel plate and the price altered accordingly. This does not effect the basic application.
I apologise to those who have already shown interest in the original item.
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MATTJ
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RE: R31 rear calliper kit - more available NOW!
2009/12/05 11:37:55
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Hi paul im very interested in this setup put me down for a set if you can get enough interest question though.. would we still have to cut down an old set of the drum backing plates to make the spacer for the axles flange to housing?? or can we ditch that altogether and simply bolt the caliper bracket on and put the disk over the axle bolt it all on and enjoy
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Paul Dunstan
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RE: R31 rear calliper kit - more available NOW!
2009/12/05 11:43:03
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Hi Matt.
Good question - I have looked at this also and I have not come to a conclusion as yet.
Does the thickness of the drum brake plate impact on the bearing and is it still required? From a common sense point of view I would say yes as it would have been engineered to allow for the backing plate to be sandwiched between the housing and retainer.
Any other opinions?
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MATTJ
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RE: R31 rear calliper kit - more available NOW!
2009/12/05 12:02:21
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thats what i was thinking as well is probably would be best to retain the backing plate as that would keep the bearing and depth of the axle 'factory' as well.
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Paul Dunstan
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RE: R31 rear calliper kit - more available NOW!
2009/12/05 12:17:03
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Just consulted an engineer at work and he suggests to retain the backing plate thickness. I had thought of getting a new shim laser cut to suit but I was struggling to justify the additional cost considering there's a redundant backing plate available to modify.
Is it worth the additional $20(est)?
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