Originally posted by Tiggie
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As long as the overall length/travel length of the pistons is appropriate the smaller diameter ones should be fine...my worry would be if there's longer travel required and you end up popping the pistons out of the WC down the road. I'll be rebuilding my brake system from scratch with a newer style MC (no valve on the frame rail), new hard lines, 95-97 front brakes but keeping the 11" drums.
If I'm understanding the hydraulics of it correctly, the larger diameter WC would give crapper pedal feel on account of taking more force at the master to create the desired amount of friction at the drums. Maybe they found the 11" drums had accelerated shoe wear vs the 10" and that was the solution to get more brake balance up to the front (use a larger diameter WC)?
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