I didn't speculate on "what if's". I went directly to the calipers and measured the pressure at each corner.
You can do this with the engine running for vacuum and with it off and compare the differences.
This is a "brake pressure gauge" from Strange engineering. 1,000 psi limit.
It will help you set your adjustable rear proportioning valve as well.
I'm just a "need to know guy". I like to see the data. Assumptions too often are incorrect and sometimes not even "in the ballpark".
Reading the gauge helped me understand the differences in pressure the caliper receives with a soft pedal or a rock hard one. The softer the feel of the pedal, the less pressure it is receiving.
You shouldn't be "tuning" the pressure to the caliper by playing with pedal pressure. I get my pedal as hard as I can get it. I have had master cylinders fail even when new, while bleeding the brakes manually. Using a pressure bleeder to at least get you close relieves some of the stress on the master.
