I'll correct myself on the 10 lb RPV cuz I shouldda not relied on my memory (I was at work ya know?).. 10 lb'ers are only used with drum brakes. They'll all be 2 lb'ers with 4 wheel discs.. After further review, I don't think you need them unless you're building a street rod with the MC mounted low.
Below is a pic from the Speedway Motors catalog. In contrast however, I would install the rear valve after the proportioning valve.
I would question why GM/ Cadillac felt the need to utilize RV's for disk brakes.
If they didn't install them from the factory, I would question why an aftermarket supplier is recommending them.
Keep in mind, calipers BY DESIGN are always in contact with the rotor. They only contract when pressure is released and also the slight run-out of the rotor (no matter how well a rotor is turned it has some run-out) also pushing.
I personally wouldn't install it. But if it wasn't a hassle it might make a fun experiment to see what difference it made.
If anything, I could see excessive drag at first, but eventually once the self-adjust begins to slacken it would eventually start making up the difference.
Thanks for the feedback, guys. I am getting a bit confused though. I think I will install w/o the rv and see what happens. If I have probs keeping a pedal, or the adjusters don't work, then I can splice the 2 lb in. If that isn't enough, then I'll go with the 10 lb.
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