smdl
|
| posted on 29/4/06 at 03:14 AM |
|
|
Sierra Rear Disc Conversion
I am using a Merkur (Sierra) setup for my rear DeDion axle, and am considering switching to disc brakes. I know that this isn't really
necessary, but I am using Miata (MX5) front uprights, and I want to re-drill the rear discs to match the front PCD. I'm sure that this would be
much easier to do with discs.
So, what do I need to do this? Unfortunately, the North American Merkur never had a disc option, so I can't just move the appropriate Sierra
parts over.
I see various UK suppliers selling brackets for the conversion, so I know that I need those (are these used for mounting the calipers?), but what else
will be required? I am thinking of using aftermarket supplier for discs and calipers anyway, as I want to go as light as possible. Does anyone have
any Wilwood (or other) part numbers? It would be nice if I could find them on this side of the pond.
Any thoughts relating to manfacturer, model numbers, disc sizes, etc., would be appreciated.
Shaun
|
|
|
|
|
scoop
|
| posted on 29/4/06 at 07:56 AM |
|
|
If the dedion axle is for a sierra and you are using the sierra drive shafts then all you need are the caliper holder conversion plates to fit the
sierra discs, calipers, pads and handbrake cable to. A straight swap on my GTS supplied dedion.
|
|
|
coozer
|
| posted on 29/4/06 at 04:01 PM |
|
|
Where do the conversion brackets come from?
1972 V8 Jago
1980 Z750
|
|
|
smdl
|
| posted on 29/4/06 at 04:21 PM |
|
|
Great! Thanks for that, scoop.
Can anyone steer me to any lightweight Sierra rear calipers that retain the rear handbrake. My priorities are
1. Handbrake
2. Light Weight
3. Available in North America
4. Price
Also, what manufacturer and model of lightweight discs will work with the adapter plates and calipers? What I am looking for is a combination that I
am sure will work from a mounting and disc thickness perspective -- especially if I have to order from overseas. I really don't want to have to
send them back!
Thanks again for the assistance.
Shaun
|
|
|
Wadders
|
| posted on 29/4/06 at 05:48 PM |
|
|
VW Golf Mk4 have been used, check out the link for a picture http://locostbuilders.co.uk/viewthread.php?tid=42886
As it says in the post they wouldn't fit under my rims, so i ended up using Peugeot 206 calipers which are also an option, but quite a bit of
work is needed to make them fit. As for light disks i used Honda CBR600 ones, on homemade ally bells. alternatively IMHO most standard car disks will
withstand serious llightening on the back of a seven, as they are virtually doing nothing.
Hope this helps.
Al.
|
|
|
smdl
|
| posted on 29/4/06 at 06:12 PM |
|
|
I'm impressed, Wadders! You seem to be quite a capable fabricator (making your own ally bells)! Not sure I'm up to that challenge, but I
will take a look at the Golf gear you have described.
Thanks for the info.
Shaun
|
|
|
smdl
|
| posted on 29/4/06 at 06:26 PM |
|
|
Coozer, you can find the plates at several of the UK manufacturers. Here are a few, although I'm sure there are more:
MAC#1 Motorsports
MNRacing
GTS Tuning
Shaun
|
|
|
smdl
|
| posted on 29/4/06 at 07:09 PM |
|
|
Are These a Good Choice?
Rally Design Hydra-Mechanical Ally Rear
Caliper
Are these basically VW calipers? If so, does anyone know if they have been modified to work as a Sierra replacement?
Edit: Sorry Al -- I just re-read the other post you sent me to and see that you have already indicated that they are the same. Thanks for the
info.
Thanks,
Shaun
[Edited on 30/4/06 by smdl]
[Edited on 30/4/06 by smdl]
|
|
|
SilverFox
|
| posted on 3/5/06 at 03:17 AM |
|
|
disc conversion
shaun,
You may have a challenge here as the Miata is 4x100mm PCD and the merkur is 4x108mm. If you use the merkur rear hubs they have two large holes (22mm)
at the locations required for redrilling, which makes changing the PCD a bit of a pain. The conversion is not difficult if you stick with the 4x108
pattern and use the Scorpio calipers with Focus 4 bolt rear discs (either the 10" or 11" SVT versions) with a suitable caliper mounting
bracket which can be made from 1/4" plate.
You may want to consider using the Miata rear uprights and adapt the miata outboard lobro drive to the merkur halfshaft - either inboard or outboard.
That way you get the 4x100mm PCD alround.
Try Dan at www.Deman-motorsport.com in Ontario. He is doing a Miata based setup.
Alf
|
|
|
smdl
|
| posted on 3/5/06 at 04:01 AM |
|
|
Hi, Alf.
You and Bob are awesome! You always have great answers and are always willing to help.
I was jokingly telling someone the other day that Bob could probably whip up a Boeing 747, using only hand tools, over a single weekend, so that he
could fly his car to Florida instead of towing it. It would probably fly better than Boeing's version, as well.
I'm out of town at the moment, but I will definitely start looking into this further when I get back home.
Thanks again -- I hope you don't mind if I have some more questions as I go along...
Shaun
|
|
|
