Questions about rear disc conversion.

[Welsh Dan]

My drums need replacing as they're not round and the mechanisms stick a bit, so I priced up the parts this morning, needless to say I've seen rear disc beams going for sale on here for not much more, so:

Will the hub, disc and caliper assembly all fit under nova 3 spokes? Will I get away with a GSI master cylinder or will I need a bigger one to 'feed' the rear calipers and the 256x20mm ones I have on the front?

I know about the issues with brake bias :).

[_JH_]

They don't fit under 3 spokes. You say you know about brake bias, so before setting that up I'd suggest a bigger master cylinder.

Plenty of people will now reply saying they didn't bother, which is great, but it's better if you do upgrade it.

hope that helps :)

[Welsh Dan]

Thanks, not fitting under 3 spokes rules it out for me lol as I want to keep them.

[Adam]

The rear discs are actually larger than 16v front ones,Lol.
So yeah, they won't go under 3spokes.

[Austin_Nova16]

I ran a golf rear disk set-up on my old valver....much smaller that the vx stuff..

[Welsh Dan]

I ran a golf rear disk set-up on my old valver....much smaller that the vx stuff..

Cool, which golf was the donor car, and could a rookie like myself do it?

[Philsutton]

if anything you will need to reduce the breaking power to the rear otherwise you'll probably die.

[Adam]

Fitting a rear disc beam is going to cost a lot more than sorting the drums, as you'll need new copper brake pipes etc for the calipers.

And theres no benefit in discs, especially with 3spokes as you wont even see them.

:)

[Welsh Dan]

Thats that idea out of the window then, cheers guys :).

New drums+shoes it is then, and if its bad in there when I take the drums off, new bearings + brake pistons etc.. lol.

[Lee]

Agreed, only go for discs if you a) want the look, or b) are going for the increast efficiency of having no fade or want the added fine tuning of an adjustable brake system, e.g, on a track car, although IMO, even on a track car, Drums do the job fine using the right shoes.

Bias setup is essential unless your planning on some serious **** end action lol

[Philsutton]

yeah "a real must have" for the driver that likes to have no control over the back end lol

[Welsh Dan]

My main reason was that I'm fed up of the drums f**king up every few years lol. I know i'd have had to seriously reduce the braking amount on the rear, I just didnt know anything else.

[craig green]

what handbrake cables to people use on disc rear beams. Ive heard so many combinations & answers.

Who uses what?

[Paul]

old post but bump /\ what craig said

[craig green]

Theres quite a feww users wanting to know, what cables are needed. Some say a mk2 Cav short cable but there is 3 variants of this...

[matthew172]

the part number if you go to tms or partco for the correct mk2 cav cable is qh bc2276

[Paul]

qh=quinton hazel is no longer stocked by partco

[Paul]

ok cav mk2 and mk3 is part# 2022 so they are the same. thats the left hand side of the cable, priced at 4.56+VAT. The other bit i can only assume links to the handbrake back to the right hand caliper, use a long nova bit for that and that, one which i will aready have on the car? the cav short links to the nova short in the middle of the rear beam, and then the nova long extends to the handbtrake itself? am i correct?

[d]

cav short - (cant remember what one) with threaded part extended
nova long - gte (on mine)

my axle is moddified from standard though so not sure if it'll work on a normal axle