Aluminum Master with rear drums

chrgdrt said

my understanding is that the newer car have a different type of rear wheel cyl. that does not require a residual valve so i was wondering what everyone has done and how it worked out.

Click to expand...

Correct, but "newer" means c.a. 1970's. The change was that the springs in the wheel cylinders have either a cup or a tightly wound spring to form a cup. That keeps the lips of the rubber piston seal tight against the bore. Before that, the "residual valve" locked up ~10 psi to keep the piston seals tight so they wouldn't leak. No need for a residual valve in the MC since. The only people who use them now are hot rodders who install the MC below the floor.

Most people here use an 80's Dodge truck MC, and that is what Dr Diff sells w/ his adapter plate. But many MC's would work as long as they have the bore you want and two female dbl-flare ports. I use one for a 95-99 "cloud car" (Breeze, etc) w/ ABS (2 ports) w/ 7/8"D bore. Around 2000, many manufacturers changed to bubble-flare fittings, which you might want to avoid.