Which axle???

Post by **Coops** » Sun Feb 27, 2011 7:30 pm

Today it was rear disc bracket fabrication,

Caprisport/Mustang Rear Disc Brackets:
The start of the design work for the rear disc brackets,

After a bit of fettling a trial fit on the axle,

Now with caliper strengthening brace welded on and the sides bent to form a rib,

Now fitted for final fit-up and adjustment prior to being sent off for blasting and coating,

stevieturbo · Post by **stevieturbo** » Sun Feb 27, 2011 8:51 pm

It's a lot easier just mounting the bracket to the rear/inside of the axle flange. And 3 bolts is plenty, makes for much easier removal when needed.

Sandwiching it like that means a full strip down and shaft pull to take it apart.

Post by **Coops** » Sun Feb 27, 2011 9:16 pm

yup it does mate,
but the shafts come out easy, and hopefully the brackets wont ever have to come off again as like on my old capri axle,

plus the design of the bearing ends mean you need to shim it, (usually has a back plate between the outer clamp and bearing housing).
so we just used the gap to put the bracket in kills two birds with one stone.

DaveEFI · Post by **DaveEFI** » Mon Feb 28, 2011 9:45 am

I'm working on a disc brake conversion for my SD1 - and wondered how you calculated the strength required for the bracket. I've got some 12mm dural which I was hoping would do. Easier for me to work.

kiwicar · Post by **kiwicar** » Mon Feb 28, 2011 10:29 am

Hi Dave
!/2" dural. . .that should do it!, if you want to calculate it out, measure the thickness of the bolts holding the calipers on, find the shear stress they can take then that is about twice the strength the brackets need to be able to take. A simpler rule of thumb calcuation is to have about about 2.5 times the bolt diamiter all around the bolt holes (assuming the same thickness of metal in the mounting plate as the caliper mounting lugs) also assuming it is a steel caliper body and an ally mounting, and make that the minimum area of metal in the mounting bracket. It will be over kill but safe.
Best regards
Mike

stevieturbo · Post by **stevieturbo** » Mon Feb 28, 2011 11:30 am

What's dural ?

When you look at some brackets, it shouldnt be hard to get an idea of how strong. Some even look fairly flimsy.

I just used 8mm steel plate affixed to 3 bolts for easy removal.. after making templates from some mdf.

kiwicar · Post by **kiwicar** » Mon Feb 28, 2011 3:25 pm

Hi
Dural, or Duralium is a trade name for an early self hardening alluminium alloy, ie one that did not require heat treating to reach it's full strength. Problem with the stuff was that it work and age hardened beyond it's initial short term gain and became highly brittle, as several operators of Comet airliners found out when the tails fell off. It has became slang for any self hardening aircraft grade alluminium alloy, and that is the meaning I took to the mention of Dural in the post. If you are interested there is a wikipedia article here http://en.wikipedia.org/wiki/Duralium
Best regards
Mike

DaveEFI · Post by **DaveEFI** » Mon Feb 28, 2011 4:24 pm

Interesting stuff - thanks. I was initially intending fitting the bracket to the back of the axle casing flange, but was concerned about how close the bolt holes would be to the edge. Had already decided on three bolt fixing - the one other conversion I've seen used only two.

Post by **Coops** » Sat Mar 12, 2011 8:05 pm

Today was trial fitment day:

A hole where a capri axle once lived

And now where a Mustang axle is fitted for a trial fit up

The axle is now removed for final welding,
was well impressed with how it went together as the axle bracket work was done over at caprisports workshop
and today was the first time its seen the capri

need to do a few tweeks when we do the final fitting,
and we cant go the single piece prop route as it will hit the exhaust pipes in the tunnel area

JJMclure · Post by **JJMclure** » Tue Mar 15, 2011 9:21 am

looks good in there!

kiwicar · Post by **kiwicar** » Tue Mar 15, 2011 5:19 pm

Hi Tony
so . . . when are you going to paint the petrol tank????

Best regards
Mike

Post by **Coops** » Tue Mar 15, 2011 5:41 pm

when i can afford to put some fuel in it

have a spare tank waiting to go in once the car has been painted next year mate,

Post by **Coops** » Sat Mar 19, 2011 10:59 am

The propshaft is now ordered, that shoukld be abck here end of next week,

So, what oil does the 8.8 use? and does it need an additive for the LSD?
what do you use in yours Stevie?

stevieturbo · Post by **stevieturbo** » Sat Mar 19, 2011 11:50 am

Coops wrote:The propshaft is now ordered, that shoukld be abck here end of next week,

So, what oil does the 8.8 use? and does it need an additive for the LSD?
what do you use in yours Stevie?

I just used Castrol B373, although my Torsen doesnt need a specific LSD oil

Post by **Coops** » Sun Mar 20, 2011 9:37 pm

have had a great day at caprisport today,
the axle brackets are now fully welded, just the rosejoint turrents to make and weld on now,
propshaft should be back here with me next tuesday/wednesday
getting close now to actually driving the car again

The V8 Owners Forum -

Which axle???

And Today Class Rear Disc Brackets.