Rear Brake Options

[projectpug 0]

Hi all,

 

Just wondering if there are any lightweight options for changing the rear calipers i know they don't need to be any bigger due to the nature of the cars weight distribution. Any one have any ideas/thoughts on this and are there kits out there allready or will it have to be a bespoke system?

 

thanks in advance

 

Phil

Edited February 4, 2009 by projectpug

[tom_m 0]

the oe kit isn't all that heavy!

[welshpug 1,658]

you can get lighter discs from Rippthrough I believe, the calipers themselves aren't that heavy and do incorporate the handbrake so it'd be quite expensive to improve on their weight.

[projectpug 0]

What do the lighter rear discs consist of? Does anyone know the stock rear caliper weight/disc weight?

[Batfink 201]

colin satchell will be looking at kart brakes at some point

[tom_m 0]

colin satchell will be looking at kart brakes at some point

 

thats a chapman-esque commitment to lightness that, and slightly OTT if you ask me!

 

if you're lightening at the back surely you want to tackle the real running gear before making your brakes paper thin?

[projectpug 0]

Kart brakes , I take it these are similar to a motorcycle?

[Tom Fenton 1,542]

thats a chapman-esque commitment to lightness that, and slightly OTT if you ask me!

 

if you're lightening at the back surely you want to tackle the real running gear before making your brakes paper thin?

 

I have to disagree, to make a truly lightweight car everything has to come under scrutiny to see if it can be made lighter.

 

For example, here are the rear brakes on the Mini turbo drag car I helped build and drive.

Fabricated alloy rear trailing arms, these bolt to the rear heelboard on brackets so do away with the subframe assy. Alloy rear hubs incorporating a bell for the 4mm thick discs. Titanium wheel centrelock system. Motorbike lightweight calipers, still good enough to lock the wheels.

 

Thats an extreme example I know, but that is the lengths needed to build a 460kg Mini, and any weight saving especially unsprung, is worth the effort.

Edited February 4, 2009 by Tom Fenton

[projectpug 0]

That looks sweet Tom just the sort of reply i was after . Has anyone fitted motorbike stuff to a 205?

[Spiky 37]

be the first

[tom_m 0]

I have to disagree, to make a truly lightweight car everything has to come under scrutiny to see if it can be made lighter.

 

For example, here are the rear brakes on the Mini turbo drag car I helped build and drive.

 

Fabricated alloy rear trailing arms, these bolt to the rear heelboard on brackets so do away with the subframe assy. Alloy rear hubs incorporating a bell for the 4mm thick discs. Titanium wheel centrelock system. Motorbike lightweight calipers, still good enough to lock the wheels.

 

Thats an extreme example I know, but that is the lengths needed to build a 460kg Mini, and any weight saving especially unsprung, is worth the effort.

 

granted, if you've got uber light running gear like that it makes sense, but if you're not going to get rid of the lumps of pig iron that make up the trailing arms i don't see the point of shaving a couple of grams of unsprung mass by reducing the mass of your brakes

[welshpug 1,658]

granted, if you've got uber light running gear like that it makes sense, but if you're not going to get rid of the lumps of pig iron that make up the trailing arms i don't see the point of shaving a couple of grams of unsprung mass by reducing the mass of your brakes

 

that's what a Harry Hockley trailing arm/rear coilover setup does, though I'm not sure how much lighter it is.

[Tom Fenton 1,542]

I see what you are saying, but the approach to a light car has to be every little helps, as it all contributes.

[Rippthrough 98]

Especially unsprung, rotating mass!

 

 

 

Or for the hardcore running hard pads and a light car:

 

[Spiky 37]

how much are they?

 

i run ds3000's on the rear

[Rippthrough 98]

£90 a pair when they're in full production, ductile iron from SBS cast blanks, top one is 1.1KG lighter than stock, bottom one is 1.35KG lighter.

Edited February 4, 2009 by Rippthrough

[ablister 31]

i have bigger brakes on my push bike!

[Rippthrough 98]

i have bigger brakes on my push bike!

 

See if these fit on your bike:

 

[projectpug 0]

Nice 2.7kg weight swaving when using the ultra light discs .

[Rippthrough 98]

And a handbrake that actually works to boot

[projectpug 0]

Sounds like the perfect solution. Reduce weight without it costing the earth!

[ablister 31]

See if these fit on your bike:

 

 

 

maybe not then

[Dj_mini 7]

That looks sweet Tom just the sort of reply i was after . Has anyone fitted motorbike stuff to a 205?

 

Keep and eye out in the project section soon i have a bit of work in progress to be finished

[projectpug 0]

Sure will do Dj