Really big brakes

Post by **Wal** » Thu Apr 13, 2006 8:49 pm

Just finished fitting a really, really big brake set up on my moggy. 280mm vented and groved discs and 4 pot RS500 Cosworth calipers and all in one afternoon. Everything, well nearly everything, worked as planned. Yippee - mind you still have to bleed the damn things and they have dual bleed nipples on.

Why - well it seemed like a good idea and I don't use a servo.

That's it just happy.

Wal

Post by **bmcecosse** » Thu Apr 13, 2006 8:53 pm

Sounds a bit OTT ! Any chance of some pictures ?

Post by **wanderinstar** » Sat Apr 15, 2006 7:38 am

Wal,
WHAT engine have you got in your Moggy that you need such stopping power?
Ian.

Post by **Cam** » Sat Apr 15, 2006 2:02 pm

He's got a tuned 2L Fiat twin-cam that I raced (and of course lost) at Santa Pod.

I agree that it's overkill, but who cares? You can't have such a thing as an 'overbraked' car. Standard drums will lock the wheels up if you slam on hard, it's just that they can't do it often without overheating which is where discs have the advantage. Bigger discs just mean even less prone to overheating. I have to say though that I have not managed to overheat my JLH Ford (Escort?) vented disc kit and I'm very pleased with it.

Wal, sounds good. Do you have any pictures?

Post by **Wal** » Sat Apr 15, 2006 8:44 pm

Hi,
yes I agree it is a bit of overkill, and yes I run tuned Fiat Twin cam.

Part of the reason is that I want to take the car on the track this year and feel more comfortable with a bit of extra brake surface to cool. But the the real reason is they fill the alloys up soooooooooooooooo much better and look really cool.

I could probably take some photos but I can't post them, no facility. If Cam is willing to host them I can email them to him?

Regards,
Wal

Post by **bmcecosse** » Sat Apr 15, 2006 8:49 pm

Have seen Minis so overbraked (and tyred) the car could lift the rear wheels right off the ground under braking. That would be interesting on a Minor! Big brakes are fine if you need them - otherwise they may run too cold and not be effective when needed ! Pics would be interesting.

Post by **Cam** » Sat Apr 15, 2006 9:04 pm

Wal wrote:I could probably take some photos but I can't post them, no facility. If Cam is willing to host them I can email them to him?

No probs: cam.shaw@mmoc.org.uk

bmcecosse wrote:Have seen Minis so overbraked (and tyred) the car could lift the rear wheels right off the ground under braking.

More to do with sticky tyres and the Mini's weight distribution rather than being 'overbraked'.

Big brakes are fine if you need them - otherwise they may run too cold and not be effective when needed !

That all depends on fitting the correct pads for the application which of course must not be overlooked. Not much to do with the large diameter discs.

Post by **bmcecosse** » Sat Apr 15, 2006 10:27 pm

Yes indeed - sticky tyres!

Post by **Cam** » Wed Apr 19, 2006 3:48 pm

Here are the piccies of Wal's brakes:

Post by **paulk** » Wed Apr 19, 2006 3:59 pm

Whats the little gauge behind the disc on the 2nd and 3rd piccy?

Must be tricky to read while driving

Post by dp » Wed Apr 19, 2006 4:32 pm

Looks suspiciously like an Accusump.
http://www.accusump.com/acc_tech_accusump.html

Post by **Wal** » Wed Apr 19, 2006 6:25 pm

Cam,
thanks for posting the picys.

Dp,
well identified it is indeed an oil accumulator / accusump, a life or engine saver for the tuned engine. Though, as said, reading the dial while driving is a bit of a pain. Though whatever it says while driving is mostly irrelevant except in serious driving mode. Excellent for upsetting inexperienced MOT inspectors though who always think its a Nitro tank - I wish.

Regards,
Wal

Post by **bmcecosse** » Wed Apr 19, 2006 8:25 pm

YES - well done - I like them !! Will you be doing a 'how to' write up for us ? Are the hubs still 4" pcd ? Or are they on the Ford pitch (whatever that is - 100mm ?) ?
With these big brakes - and fancy wheels - and arb - I am surprised not to see tele dampers on there! They make a huge difference.

Post by **jonathon** » Wed Apr 19, 2006 8:35 pm

108mm for Ford pcd ,BM

Post by **Multiphonikks** » Wed Apr 19, 2006 8:36 pm

...makes my plans for regenerative braking look positively dull!

Post by **bmcecosse** » Wed Apr 19, 2006 9:07 pm

Re-gen braking with flywheels - or with generator - or with steam ?

Post by **Multiphonikks** » Wed Apr 19, 2006 9:20 pm

That'd be letting on ;)

Lets just say that if my plans go the way I want then I'll be plugging her in

Post by **Onne** » Wed Apr 19, 2006 9:25 pm

but you would have to record the fart of course!

Post by **Multiphonikks** » Wed Apr 19, 2006 9:28 pm

Awwww... Victoria was registered on my late father's fifth birthday!

Post by **Onne** » Wed Apr 19, 2006 9:35 pm

how very nice!