Replacing brake master cylinder, but with what?

[JimK]

I do teach, and I still have that problem. Sometimes I feel the more I explain something the less likely some students are to understand

Do you mean that with discs you get better braking for the same swept area? Or that for a given brake fluid pressure you get higher pad-disc friction and hence better braking? (Part of my job is working out what delegates are really trying to find out when they ask a question )

I'm totally sold on discs - there's a really good reason why every single car sold today has discs at least on the front, and that's because they stop better for longer.

[jonathon]

I'd say the latter of your interpretations is close to what I actually mean.
It did make sense when I wrote it , honest!!!!!

[Kevin]

but I couldn't grasp Jonathan's comment about clamping pressure so I wasn't sure...

Jonathon meant that the disc pads work by using a clamping action onto the discs, brake shoes work by an expanding action against the drums, 2 completly different actions.

[les]

Just got back on line, not a problem Jim.