I recently swapped a dual master cylinder into my '66. The previous owner had installed Granada front discs, but had left the old fruit jar in place. The power brake booster was shot as well.
Rather than using a stock-type proportioning valve/distribution block, I just created two totally separate systems front and rear (or so I thought) and put an aftermarket proportioning valve in the rear line. Now someone who should know tells me that I've not improved brake system safety at all over the single master cylinder; that if I lose pressure in one wheel, I lose the whole system. I was under the impression that the two reservoirs/outlets on the master cylinder were completely separate. Is this not true? Is there fluid transfer inside the master cylinder?
Rather than using a stock-type proportioning valve/distribution block, I just created two totally separate systems front and rear (or so I thought) and put an aftermarket proportioning valve in the rear line. Now someone who should know tells me that I've not improved brake system safety at all over the single master cylinder; that if I lose pressure in one wheel, I lose the whole system. I was under the impression that the two reservoirs/outlets on the master cylinder were completely separate. Is this not true? Is there fluid transfer inside the master cylinder?