What bore size master Cylinder for C4 Corvette Brakes?

[Rick_L]

What you're missing is that pedal ratio and bore diameter have similar effects. Pressure and volume are both affected. A stop only affects total volume.

[chevynut]

Am I missing something here concerning pedal travel? Why not use a pedal stop rather than change ratio (the location of the push rod). The Wilwood and hydroboost systems I’ve used say to limit rod travel to 1 inch, and a pedal stop works nicely. What am I missing?

With the same calipers, a smaller master cylinder bore requires more travel to push the same amount of fluid. It also give you more pressure. There is a tradeoff of pedal stroke, caliper bore size, and master cylinder bore size. A smaller master cylinder give you more pressure at the expense of more stroke required. That stroke can be reduced by lowering the pedal ratio. But then you need more pedal force to get the same pressure. It's a balancing act and I had to do a bunch of calculations to get my brake system to where I wanted it since I designed a bellcrank to move my master cylinder outboard. I hope it works as expected.