Ive been out in my shed this morning and found a set of 4 pot calipers off of a 2wd cosworth which is a result because i was sure that i sold them with my old ERST.

Anyhow this has me thinking! At work i also have a set of cossy 4x4 rear calipers, would the two work together or should i stay with my STD sierra set-up?

I remeber when i done a cossy disc brake converstion on my old ERST that i had to add in a bias valve but bearing in mind the 2wd cossy disc are solid and 4x4 are vented. Think it would work?


Edit:

Ive just been doing some google research and have found the following:

• 4x4 Cosworth
  
• Front Discs 278x24mm
  
• Rear Discs 273x20mm
  

• 2wd Cosworth
  
• Front Discs 283x24mm
  
• Rear Discs 273x10mm
  

• Std Sierra (Discs Brakes)
  
• Front Discs 240x24mm
  
• Rear Discs 253x11mm
  

on a high performance car as light as most of the kits we drive most of the braking is done by the front brakes, there is almost no performance gain by converting the rear discs. In fact drums will give all the braking you will ever need. Even for most track day drivers. There is an awful lot of bollocks spoken about brakes and performance on these forums and it is often given as the most profound wisdom and advise (this might be some of it) but spending huge amounts of effort and money converting rear brakes to some fancy disks set up is likely to be money and effort wasted.

I think you may have run away with the drum brakes a little here. Probably not your fault as i dont always make myself clear.

Just to reiterate, i currently have std disc brakes (all round) from my donor sierra. But today i uncovered a pair of std 4 pot calipers which i didnt know i had, i also have a pair of 4x4 rear calipers & carriers sat on the bench at work (so it speak), so if i have it why not use it? I do have to stop a 300 odd bhp cossy lump.

My question was, will there be a problem with this set-up? I.e. the balance of the brakes front are rear etc & is there a difference between std Sierra uprights and cossy ones?

Chris

oops.....i didnt mean to step on toes. but it seems that what you want could be comfortably achieved, i think you will be looking at a limiting valve something like that fitted to the rear of the FWD lotus Elan of the early 90's. The Elan rear brakes could not be locked by using the foot pedal...huge problems when it came to MOT (used to be a lotus mechanic) but eventually the Elans had a mention in the MOT manual about the rear brakes being very low on effort. I dont see why you couldn't approach the issue the same way.