Just an FYI for everyone reading this thread, changing the master cylinder does ABSOLUTELY NOTHING TO THE BRAKE BIAS.
seriously a master cylinder does not change brake bias what it DOES change is the input force required. So going with a larger master cylinder will require MORE INPUT for the same CLAMPING OUTPUT. Basically this means for example you push on the pedal with 50lbs of force with the stock master cylinder and the brake caliper squeezes with 500 PSI (not real numbers just for explanation) now you increase to a larger master cylinder and you push on the pedal with the same 50 lbs of force, now your output psi is only 425 PSI. So in order to achieve the same clamping force of 500 you have to INCREASE your input lbs to say 60 lbs (again rough numbers), this means you have to push harder on the pedal to achieve the same amount of braking.... this is where you get the FIRMER braking comments.
In a stress driving situation (racing/spirited driving) this can be desirable as the tendency is to increase the force with your leg when the adrenaline is pumping and if the pedal is too light you can just lock everything up quickly and seemingly have no brake "feel".
seriously a master cylinder does not change brake bias what it DOES change is the input force required. So going with a larger master cylinder will require MORE INPUT for the same CLAMPING OUTPUT. Basically this means for example you push on the pedal with 50lbs of force with the stock master cylinder and the brake caliper squeezes with 500 PSI (not real numbers just for explanation) now you increase to a larger master cylinder and you push on the pedal with the same 50 lbs of force, now your output psi is only 425 PSI. So in order to achieve the same clamping force of 500 you have to INCREASE your input lbs to say 60 lbs (again rough numbers), this means you have to push harder on the pedal to achieve the same amount of braking.... this is where you get the FIRMER braking comments.
In a stress driving situation (racing/spirited driving) this can be desirable as the tendency is to increase the force with your leg when the adrenaline is pumping and if the pedal is too light you can just lock everything up quickly and seemingly have no brake "feel".
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