Brake Master Cylinder Questions

[snettleship]

I'm working on my brake system on my Series 4 Seven. I've never been totally happy with the feel of the Master Cylinder. So any help here would be appreciated...

 

- I pulled the Girling Master Cylinder. It has two ports and a single reservoir with a divider. I'm not sure if the bore size (how can I tell?)

 

- I opened the bleed screw on the left front to see what would happen. Of course, there was no front brake. The rear brake reservior stayed full. But, the pedal went dead to the floor and I could easily role the car with my foot on the brake. Should working dual master cylinder do that?

 

- I'm looking to replace the master cylinder. On the S4 Seven, I don't think I can fit a 2 master cylinder with a balance bar. So' I'm looking to replace with a Dual Integrated Master.

 

- Wildwood has something that looks like it would work. Here are my questions:

 

- What bore sizes do people use? I have 9" disks on the front with a Girling LF14 (2 cylinders) calipers. I have 9" Drums on the back

 

- I'm considering a larger bore size (1 inch) and use a proportioning valve on the front and rear lines. Does this make sense? Or worse yet, a really bad idea?

 

So, what do you folks have, especially the road racers? Thanks

 

Scott