Ok, I've read lots into all the brake conversions, but what about using stock 8.4 discs and 4pot calipers (KAD or something) or even standard calipers. Would the same still apply, a special braket and spacers??

Your thoughts?

The KAD calipers would bolt straight onto Mini disc hubs, as far as I know.

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I realise that, thats why I want to know if its possible with a simple adapter plate (ie. to use drum uprights) as in the other conversions.

The whole point is to avoid the $350+ cost of each disc upright, and instead use common mini parts including the drum uprights I already have.

I would recommend using disc hubs.

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wait till minispares uk has them on special, i got my hubs for $330NZ inc postage, NEW.

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speed costs....how fast do you want to go...

A spacer on a drum hub would have to be so thin to fit between the hub and disc that it wouldn't hold up the caliper!

What he said.... ^^^
And don't even think about welding a lug onto the drum upright. Apart from being illegal, the swivel hubs are a grade of cast iron, which does NOT like bits being welded on.

How do I know this?
I have machined swivel hubs inside to fix `em when worn, as a machinist I know what cast iron turns like.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Thanks guys, I knew not to weld cast iron (although I did weld a small hole, breather??, in a 1-1/2 SU manifold).

So how do these other conversions work then? Is there more offset on the disc to allow a bigger spacer to fit between hub and caliper?

shallow-er disc rotor (hat)

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

What he said...^^
They are shallower because they use single piston sliding calipers, which stick outwards less.
So, there is room for a mounting bracket to bolt onto the outer face of the swivel hub. For a Honda setup they are about 7mm thick.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.