Has anyone used a Sierra diff and converted to inboard discs, if so how?



Nick

im doing this at the moment and having a pair of discs laser cut to bolt through the lobro flanges but mine is a chain drive diff but the result will be the same. im having 8.5inch discs made if thats useable for you i could have another pair cut at the same time

Yep, Rob has (how's your dutch?): Click me!
Click on "Rear"

Just a thought..

Instead of the braking force being through the hub, as with std outboard calipers, with inboard brakes all the braking force is through the cv joints>driveshaft to slow the wheel..

As braking power is many times greater than engine power, is it possible to damage the cv joints over time with excesive force going through them..?

When braking all the weight goes up the front so to lock the rear wheels under braking will take significantly less effort than spinning them up accelerating.

You are thinking about the car as a whole not the rear driven axle.

Regards Mark

i seen the same sort of setup on the scrapyard on a jag. but it looked a beast of a setup.
adam

if you think about how little relative braking the back does compared to the front, it is worthwhile to fit some lightweight bike brakes and calipers. More than up to the job and very light compared to car parts.

Thanks for that. At the moment we are still in the planning stage (my locost needs to be finished 1st) of the next project, froggy thanks for the offer any way, which we think is going to be a Lotus 11 rep (for my son) and we were thinking de dion with inboard as many the of the originals had (see photo^^^).
The Jaguar I know had this set up across the board for many years, your are correct very big and heavy and as we are looking to keep weight down I think the sugestion of adapting bike stuff is something to bear in mind.
Nick

iam not sure but you might be able to get some small discs like off a mini and drill the holes in them and clamp between the driveshaft bolts then just mount the calipers. you have got me thinking now
adam

Citroen 2cvs have inboard discs on the front (hardly high performance!) & did some flat four Alfas not have them too?
Works ok for them with more force on the front brakes than you're ever going to see on the rear.

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Originally posted by hillbillyracer
Citroen 2cvs have inboard discs on the front (hardly high performance!) & did some flat four Alfas not have them too?
Works ok for them with more force on the front brakes than you're ever going to see on the rear.

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Mmm 2CV might be good for rears they have a hand brake fitted iirc.

Yup, the GS had inboard discs with handbrake on the front. Finding one may be difficult though!

The real problem is mounting the calipers, unless you use a diff casing designed for the purpose (eg ancient Jag or Rover) it will be very difficult to get a strong enough mounting. On Jags the inboard brakes caused a lot of problems.

Another point to remember is that in for example a standard sierra diff the output shafts aren't accurately supported by decent bearings, the result is goint to be a lot movement that will rattle the calipers around.


[Edited on 17/8/07 by britishtrident]

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Mmm 2CV might be good for rears they have a hand brake fitted iirc.

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My Sud handbrake was only ever any good when it went for the test, two weeks later it was back to normal The calipers were massive too I loved the car though. As BT says, won't the play on the joint knacker the pads as they move 2/3mm either way from what I remember.