Has anyone fitted Sierra Cosworth rear calipers to a locost / MK

Are cosworth hubs needed etc??

Majority of kit cars run saph cosworth4x4/xr4x4 rear calipers and discs.

2wd cosworths run a larger non vented disc set up.

2wd cossie calipers (and pads) are identical to the std sierra ones - just mounted over 273mm solid discs rather than the 253mm ones found on all non-cossie cars
(these 273mm ones need longer lugs to bolt the calipers onto though - hense the different hubs)


4x4 cossie's use the same longer mounting lugs to mount a 273mm vented disc, the caliper and its carrier are basically the same, just wider to allow for the wider disc (they also use the exact same pads)


but I'd ask is it really worth it ? given that std. 253mm sierra / granada rear discs are often over kill on a lightweight car anyway and upgrading the pads is alot easier...
remember by fitting bigger discs your also adding a fair bit of extra weight

if your not happy with the current brakes then the first thing to look at is the master cylinder(s) size and the brake pads



[Edited on 11/9/2018 by mcerd1]

I'd have to agree with "mcerd1" and ask whether it's really worth it?

These cars are generally so light in comparison to the tin top donors that meaty great big brakes are very often overkill.

2.0 Pinto so not massive power, but my MK Indy used standard Sierra Saphire brakes (discs front and drums rear). It never felt remotely short of braking ability. It's also worth remebering that cable operated handbrakes are often much easier to set up and more effective with drum brakes on the rear.