47-55.1 Pressure bleeding

[dsraven]

my thoughts too. something just needs a little adjustment tweak, a metering valve reset, check of the prop valve operation and flow test, and/or spec info to see how the master cyl in place is supposed to be connected. not a fan of the small boosters but thats what we have to work with, don't wanna re-invent the system, just get it working.
if the master cylinder is getting a stroke of some kind then there must be fluid going somewhere. it would be good to know where it is going and how far down the pipe is it getting. is there a restriction inline for the rear brakes, like the prop valve or a metering valve that won't flow? if he is power bleeding the brakes at 12 psi and isn't getting much out of the rear then there seems to be a flow issue out back.

it seems he has s10 front brakes and second gen camaro rear set up. s10 has 2 types of front brakes. single and dual piston calipers. just as a comparo for fluid requirements here is some info on these. not sure of the master cyl size that came with the brake booster kit.

s10 single 2.5" piston front disc brakes used a 10.5" rotor, a master cyl with a 0.9448818898 bore
the same truck used a rear wheel cylinder with a 3/4" bore and a 9 1/2 x 2 rear brake set and a 10.8" booster

s10 dual 1.8" (3.6" total) piston front brakes used a 10.5" rotor, a master cyl with a 1" bore
the same truck used a rear wheel cyl with a 3/4" bore and a 9 1/2 x 2 brake set and an 11" booster

a second gen camaro, say from '75, used an 11" rotor, a master cyl with a 1.125 bore, a single piston caliper with a 3" piston, a rear wheel cyl with a 7/8 bore, had a 9 1/2 x 2" rear brake set and a 10.8" booster