[Scarebird]

Originally Posted by RocktimusPryme

...Im not arguing, I agree with you that I would feel comfortable relying on the master to do what we need it to in most cases. Im just saying I don't feel comfortable stating you 100% for certain wont need some sort of proportioning device to the rear brakes when you switch from drum/drum to disc/drum. People should for sure listen to you over me, but I have done this a few times now and in different ways, and honestly, the brakes don't see to care very much how you do it...

Please let me clarify. What I recommended to our customers was bleed it well and try it out as-is: if it worked to their satisfaction - excellent, and this was overwhelmingly the case. If not, usually an adjustable delay valve in the rear line would trim it to where they needed to be. Ideally with our nose heavy cars you want the fronts to lock up a bit before the fronts to prevent the rears locking and spinning out. GM did this by different combo valve holdoff spring rates.

Other manufacturers, like Toyota and VW used actual valves with levers and linkage so when the rear rose up it cut off pressure to the rear brakes. I cannot comment on how well that worked.