Thread: master cylinder size

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What happens when you change bore size?? More or less pedel travel? More resistance? I'm Getting old and can not remember

Originally Posted by 53 Willys

What happens when you change bore size?? More or less pedel travel? More resistance? I'm Getting old and can not remember

the smaller the bore the more pressure, less volume you have, big bore less pressure, more volume. pedal should stay the same, shouldn't have to press as hard.

I like a 1" bore master cylinder on cars over 2,500 pounds, 7/8 or 3/4 on lighter cars with 4 wheel discs. On light cars, the small cyliner bore and 4 wheel discs seem to give a more controlled stop. Nothing scientific to back this up, just what works for me.

Thank you Thats what I needed
ED