Disk braked Sierra hubs/driveshafts/calippers

[Chris Gibbs]

Hello folks would anyone have available driveshafts, hubs and callipers for a disc braked Sierra?

I need some :)

cheers

Chris ;)

[Chris Gibbs]

Just bumping this up - I still need the parts!

cheers

chris :)

[Tenlow]

I have a related question, my sierra parts have drum rears, is that something that can be changed easily or do I need disc brake hubs?

[Chris Gibbs]

You'll need disk braked hubs, the drum braked ones dont have a bracket for the calliper. It might be that just the back plates are different but I don't have one to hand (hence the advert!) to check.

Cheers

Chris :)

[MTor9?]

Isn't this the way forward?

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=330215656987&mpt=1206048902487&tGUID=b97de2de1180a09c1484d964fff79f1b

I hope so, as I was going to heed the good advice of a previous poster 'fit what you've got and modify later'.

[Tenlow]

Isn't this the way forward?

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=330215656987&mpt=1206048902487&tGUID=b97de2de1180a09c1484d964fff79f1b

I hope so, as I was going to heed the good advice of a previous poster 'fit what you've got and modify later'.

Great, that's actually exactly what I was hoping for!

Finding sierra (merkur) parts in the states is hard enough, I was going to be upset if I had to find a new set of hubs to go with my drum rear end.

[mconley3]

Some interesting brake upgrades for the Merkur.

http://www.key-ideas.com/DG-PBR-Front-Brake-Upgrade.html
http://www.key-ideas.com/DG_RearBrakeUpgrade.htm

The above parts are easier to find and cheaper.

Mark

[Chris Gibbs]

Isn't this the way forward?

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=330215656987&mpt=1206048902487&tGUID=b97de2de1180a09c1484d964fff79f1b

I hope so, as I was going to heed the good advice of a previous poster 'fit what you've got and modify later'.

I' ve not seen those before, looks like a good option, what sort of price are they?

Cheers

Chris :)

[3GE Components]

The only problem with these are that they are in line with the original bearing carrier, these are OK if you have enough clearance behind the bracket.

With the Roadster the upper shock/arm mount is in the way. Thats why the uprights are different for disc or drum.

What is needed is a bracket that keeps the bearing carrier in the original position but has the caliper mounts at 90°.

A bit like our ones ;)

ATB

John

[MTor9?]

Thanks for the info John, I was hoping this was possible.

I am still unsure if rear discs are the way to go for sva, as isn't it necessary to have a brake bias adjuster, which will not pass sva unless of the automatic type? The setting up of which seems to be a bit hit and miss.

Does that then mean that if I convert after sva I would need new driveshafts and diff?

I would prefer the discs, but only for aesthetic reasons, surely drums on a 600kg car are more than adequate?

[Chris Gibbs]

You can use an adjustable bias adjuster but it needs to be locked(to the satifaction of the tester) so that it cannot be adjusted. This usually means pining the bias bar. The alternative is to fit a brake proportioning valve in the circuit for the rear brakes, the Sierra is fitted with one as is the Fiat Uno range, these reduce the pressure to the back brakes but are not adjustable. The prototype is fitted with Standard Sierra front discs and rear drums and didn't need a proportioning valve, the brakes are excellent - do you need rear discs? It's worth considering.

If you go with rear discs I'd recommend making an adjustable proportioning valve as shown on this page by Dave Andrews.

http://www.members.aol.com/dvandrews/bpvalve.htm

This would need setting up OFF ROAD by turning up the valve until the fronts lock up first in all situations. As this is adjustable, but not from the drivers seat (it's usually under the car or in the rear suspension area) it's ok for the SVA.

Cheers

Chris :)

[snapper]

Some options for this problem are the standard brake bias valve mounted at the correct angle as the original fitment.
A mini bias valve which fits on the master cylinder.
Or a twin cylinder bias bar system with the adjuster bar pinned.
My friends Robin Hood super spec that we took to SVA last month has Cosworth brakes all round and was suspect on the brake test but the equipment broke so a road test was done and while he passed, the rears locked up at almost the same time as the fronts.

[greasemonkey]

hi ,
i have bought off ebay 2 rear hubs 2 flanges and 2 rearstubs which are 108mm diameter ,im told they are off a 2.9 4x4 1989 are the rear hub all the same size? and are the drive shafts and lobro joints all standard size?
the other question is which disks can i get for this will they be solid or vented?

regards
lee

[Chris Gibbs]

The 4 x 4 had solid discs, as far as I can remember all the Sierra hubs are the same size, with two different types of driveshafts, ones that push into the diff and the bolt on ones.

Cheers

Chris :)

[3GE Components]

There's 3 i think, 2 sizes of CV joint, standard 100mm & cosworth 108mm and the push in type.

ATB

John

[greasemonkey]

cheer's lads,even thow the driveshafts come in various forms cv joint push in type/lobro & stub 100mm & 108mm are they all the same spline size & pattern between the hubs and differential and are the length's of the shaft's the same?

sorry if these seem to be silly question's

regards

lee:D

[mconley3]

For those in North America. I used a common Merkur rear disk brake conversion kit, '91 Thunderbird SC calipers, and '88 Thunderbird Turbo rotors. Everything seems to fit correctly without interference.

http://usera.imagecave.com/mconley3/Suspension/uprights_03.jpg
http://usera.imagecave.com/mconley3/Suspension/uprights_02.jpg
http://usera.imagecave.com/mconley3/Suspension/uprights_01.jpg
http://usera.imagecave.com/mconley3/Brakes/brakes01.jpg

Mark