As you know i've been faffin around with brakes a lot latly. So why are some calipers - ours and many alike on the front upper third of the disc.

And others on the rear upper third of the disc ie-scooby, intergrale etc.

Which actually cools quicker, the more i think about it the more pros & cons i think of for both.......No differance in either or has one of you the answer.

 

 

I know that the position of the cliper can make a difference. I dont know too much about it be I did read somthing about drums. Drums whos shoes are up and down have to best effect but had a tendency to stick a lot. Maybe because of the heat. Shoes that go horizontal didnt stick but didnt hold as well.

I know that (unless anyone can tell me otherwise) brakes in a Leading, trailing or radial (on top, I think????) has no difference to the braking ability, it cant, because the disc is spinning the same rotation, the caliper exerts the same force and is 'the same' (relatively speaking) distance away from the centre point of the hub etc.

The only difference in making manufacturer fitting leading, trailing or radial caliper mounts it the suspension setup, i.e. where the suspension pickups are, track control arms etc and where the steering rack is picked up. Routing of the brake fluid lines may also have an effect on the location of the caliper, buti could see a manufacturer routing the brake lines before the designed the caliper position (maybe they did, I dunno).

Maybe someone else could give more ideas?

Hope it answers your question anyway

The position of the calipers does affect the centre of gravity. Tiny amount on a car of course but on bikes it worth considering. I suspect in front or behind the disc will also affect whether the forces 'push' or 'pull' on the suspension and if the caliper is behind the disc then cooling of the disc may be easier to achieve, unless the discs are hidden within the wheel, which they are on a Zed.

Cheers for that, I posted because i also came up with the ctr of gravity - suspention (grab) theory being the most prominant.

But im all for comments

Cos I want to re-engineer a twin caliper hub, 4 pads - & abs burst valve, to cut in when required. To suit any size rotors.

Its on a road car now! so it can be done, just a few hundred pages of maths i guess.

But would it be any better.

 

harve

it has to do with the mounting point and that is it as far as im aware.

Harve

 

I imagine that 2 calipers on a disc is going to vastly increase the heat build up and limit the amount of air flow going to the disc. There may also be the issue of warping discs on a more frequent basis f it is that heat is an issue.

 

In theory it sounds a brilliant idea apart from the maintenence side of things....BUT...

 

8 - 12 Pots per disc!!! NICE

 

By the way, is your email working yet?

 

[This message has been edited by Cos (edited 10-05-2002).]

Heres a pick of 2 calipers on one disc(but the small one looks like a single pot):

 

------------------

 

Trev

1990 300ZX TT 2+2(import)

http://www.300zx.co.uk/rides/trey/