Quote:
Originally Posted by The HACK
Problem with upgrading to a 335i caliper on a 328i is the master cylinder is designed to drive a smaller piston area. Now all of a sudden you increase the piston size front and rear and you will end up with piss poor pedal feel.
ANY brake upgrade involving changing out calipers, you must consider the overall size of piston area or else suffer a soft or limp brake pedal.
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Not necessarily since the stock master cylinder should have the capacity to push bigger or more caliper pistons per wheel. BBK's (i.e. Stoptech) do not include bigger master cylinders for a reason. If you increase the master cylinder size you would have more pressure than needed per caliper. The ratio between master cylinder size and caliper piston size is not linear so any increase in master cylinder size would multiply brake line pressure by a substantiable factor. Having said that, there should not be any difference in pedal feel.