Not being a hydraulics expert I am wondering which size bore master cylinder, 7/8", 1", 1 1/8" would be the best choice for a four wheel disc brake system without a booster, . Or would it be different with a booster? Thanks for the help.
I am no expert but I tried to use a 1'" bore master on a system designed for a 7/8 bore and it would not lock the wheels. A $60 dollar lesson in hydraulics There is a real science to the design of the system.
Not sure there is a best. You sort of have to work through the available pedal stroke and the amount of fluid you need to move the caliper piston.
On a related issue, I am fabbing brake and clutch pedals for my A coupe using my stock A pedal arms as a starting point. I have support tube mounted on the frame for the pedals to pivit on. I now have to modify the arms by welding on lower levers to actuate the brake and clutch master cylinders. My questions are: 1) with a 12" long upper pedal arm, how long should the lower actuater arm be? 2) I'm running Mustang II discs up front and Jag discs in the rear. Can I run a non-power master cylinder and if so, what is a good recommendation?
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