Camaro SS 4 piston calipers

[Titan1021]

I have a 68 camaro with drums all around. I’m going to be installing some 4 piston Brembo off a 6th gen camaro. My question is what type off MC should I go with. I was thinking of going with a wilwood tandem MC. And adding a residual pressure vale for the drum rears. Just to note. I plan on adding rear disk some time in the future. Any help would be appreciated.

[andrewb70]

Don't need a pressure valve in the rear. Are you doing manual or power brakes?

Andrew

[dhutton]

Pretty sure a 10 psi RPV is needed for rear drums....

Don

[andrewb70]

Pretty sure a 10 psi RPV is needed for rear drums....

Don

Why? I thought those were only needed when the MC is mounted lower than the wheel cylinder?

Andrew

[dhutton]

Rear drums need some preload on them or they will not brake effectively. The preload keeps the pads just kissing the drums.

Don

[Titan1021]

They are manual brakes. And will stay that way. Is there a way for me to use the original master. With the new disk brakes.

[67King]

They are manual brakes. And will stay that way. Is there a way for me to use the original master. With the new disk brakes.

I would fully expect that you will be moving a much greater volume of fluid with 4 pistons each with, say, 40mm or so diameter versus 2 with about 12mm, and that the result would be that you'd need a larger bore MC. MAYBE a Corvette one would work, but still look the same. I have Corvette brakes on my GTO, but I don't think the pistons are all that big. Been a long time since I had them apart. The bore size difference is 1.125 compared to 1.000 for the drum brake cars, which is a little more than a 25% increase in fluid moving capability.