For the teams that have done custom master cylinders or calipers, what surface roughness of the bore did you aim for? The mfg. of our seal does not give any concrete values, but it seems that par for the course is 10-20 micrometer RMS.
Alternatively, has anyone measured the rougness of a purchased MC/Caliper?
Is turning and reaming sufficient, or do you also hone the bore?
Matt Gignac
McGill Racing Team