Originally Posted by
Sp3no
Im sure mondeo 300mm calipers fit straight onto non focus ST knuckles you may have to drill the caliper mounting hole by 2mm but thats it. ST170 calipers have a seperate carrier that bolts to the ST170 knuckle, the mondeo does not, the caliper bolts straight to the knuckle.
So you need MK3 mondeo calipers and pads, ST170 disks.
you can not fit a bigger disk to a standard mk1/1.5 focus as the pad carriers are cast into the knuckles and physically stop the use of a bigger disk!
to go bigger you have to fit st170 knuckles. i've done this conversion on my 2l and its well worth it.
some have used mk3 mondeo callipers aswell but always have to use st170 knuckles. i'm not sure how the calliper mounts on the mk3 modeo as i've never done my dads brakes to find out but i'd assume there would be a mounting bracket for the calliper that bolts to the knuckle.
there are advantages to going with the mondeo calliper
1. it can deliver a larger force as the piston is bigger although it does require a greater movement of the beak pedal to get the same travel from the piston. this really wont be noticeable though
2. the pads i think are slightly bigger so more friction = more breaking power
3. their cheaper.
disadvantage. not as big a range of performance pads.