master cylinder for stock front disc + empi rear discs

[flat]

Yeah, but at 24mm the bus MC is way too big..... You'd need quads like Schwarzenegger to stop the beast.

[C4 Metal Werks]

Even a 71 bus with front discs and a brake booster uses a 26mm master cylinder? I'm pretty sure that is what I used on my 65 bus when I converted it to 4 wheels discs.

Originally Posted by flat

Yeah, but at 24mm the bus MC is way too big..... You'd need quads like Schwarzenegger to stop the beast.

[flat]

Originally Posted by C4 Metal Werks

Even a 71 bus with front discs and a brake booster uses a 26mm master cylinder? I'm pretty sure that is what I used on my 65 bus when I converted it to 4 wheels discs.

The late bays use a 24mm dual circuit MC. The pedal ratio of an early bus allows the use of a larger MC without drastically increasing the pedal effort. A bug has less pedal ratio and hence you need more pedal effort.

For the record, I've got a 4 corner C2 (1991) setup on my 65 bus with a early 944 stepped MC (23/19), and I'm heavily leaning towards and early 911 (20.6mm) MC to increase line pressure and decrease pedal effort. Although I do admit that my pedal is very reasonable and it's doesn't take much foot to make it stop, but I'm sure it can be better.

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