What size

[Odies dad]

I have a 4 wheel disc brake setup going on the hotrod. I have the under floor pedal assembly with a 7" dual diaphragm booster. I will use an adjustable proportion valve and residual valves.
I want the corvette style master cylinder with dual ports but I don't know if I should get the 1" or 1 1/8" bore master.
What is the general consensus?
They are the same price.

 

[Dr Crankenstein]

Disc brake calipers need more volume than drum brake cylinders. I'd go with 1 1/8"...

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[Odies dad]

Thanks

 

[kenny c]

Are residual valves needed for discs?

 

[Dr Crankenstein]

Are residual valves needed for discs?

Discs or drums. Anytime the MC is mounted lower than the calipers or cylinders, you should use residual valves.

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[Old Iron]

Disc brake calipers need more volume than drum brake cylinders. I'd go with 1 1/8"...

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For my personal info, would you use 1 1/8" if it were manual 4 wheel disc ?

 

[Dr Crankenstein]

For my personal info, would you use 1 1/8" if it were manual 4 wheel disc ?

Sure, but pay attention to pedal ratio.

http://www.mpbrakes.com/techtalk/how-to-series/calculating-pedal-ratio

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