Wrong master cylinder!!!

[gpreston57]

AS Ive been sayin all along, not up on brakes, got all4 drum man. brks.74 swinger, but in looking on here, I have the master cyl. with the small pot in front big in back, how bad will that affect braking? this is for power disc. I have very hard pedal, very poor braking performance.If I correct this, will it help much???

 

[chryslerfat]

Part of the difference is a drum brake master cylinder has a residual check valve to hold pressure against the wheel cylinder cups. If use on a disc car it will cause caliper drag. If using a disc master on drum barkes it will not work the drum brakes properly as it has to overcome no residual pressure. Get the correct master for your application.

 

[caferacerx]

the wrong master cylinder can cause poor braking