I need help on which size bore I need on my car?

How does it work? The smaller the bore the less fluid is pumped? So the bigger the bore the more fluid is pumped?

Im a newbie when it comes to the braking system

Billy

 

what do you want it to do?

 

Ideally to stop the car when I push the middle Pedal

Jokes aside, I'm going to make my own pedal box system because I have a serious lack of space to use a standard size servo etc

So need to find out what size bores to use etc as I dont want to get balls deep only to find that I have the wrong Master Cylinders

Billy

 

smaller the bore means more pressure IIRC

 

Smaller bore means less force acting on the pedal, because P=F/A. P should be constant, so smaller A means smaller F to keep P the same. Thats why a smaller bore master cylinder gives you a lighter pedal and longer travel than a large one.

A smaller bore cylinder have less volume which means you need to push the piston further to move the same amount of fluid as a larger one.

 

Argh! My brain!

Ok I follow you I think, so would I use a smaller bore for the fronts and a larger bore for the rear?

Billy

 

That depends on your caliper pistons (slaves). You should most likely use two equally sized mcs and then its only a matter of adjusting the brake bias (a lever which controls the stroke distribution).

The only reason for using a bigger mc is when your stroke is limited or if you experience very long pedal travel, mainly due to additional pistons on large brake setups.