Hey Guys, I have aquired new front and rear disk brakes, but i am getting mixed messages on what i need to do about my master cylinder. I have a new dual bowl stock style non-power cylinder and i would like to stick with that, but i have many people telling me i will have to change it?...come on experts..let me know what i need to know...what do i have to do or change in order to use the same cylinder i had for my drum brakes with my disk brakes???

 

You cannot use a drum/drum master on a car with disc/disc brakes. The disc brakes are valved differently (in the master) than drums. You should be able to use an 84-86 SVO master cylinder.

 

yes, no way you can use the old master. fully agreed

 

You did not state what calipers you are using. If you are using single piston calipers, it would be marginal because of small reservoirs on the OEM masters and the volume requirements of the big OEM single.

If you are using 1.75 piston in front and 1.38 piston in the back with a .50" pad or less the stock 67 drum brake master will work just as long as you watch the pad wear. You most likely will only get 60-75% out of the pads because the reservoirs are small.

Just make sure the distribution block is taken out, or your wheels will lock up.

You should have about 8 to 12 oz to service both the front and rear system correctly. Anything less than that you will not get 100% wear out of the pads.

 

I was thinking it would work so long as the RPV's are out of the system, we are using a stock 67 M/C and it works well with my son's disks.

Works for us...

 

Did you use a kit or did you do a swap from another car? If you used a kit then you should follow what the maker recommends.

 

Yes, you are correct.
BTY, nice 506hp, wish my dad would have gave me a 500 hp car.