[Shotimes] Question on brake proportioning valve

[Tom Leeth]

When I work on the rear brakes on my SHO I usually use a floor jack to raise
the left rear suspension just enough to crack the proportioning valve so that
I can easily compress the rear caliper pistons, assemble the pads, and do a
function test of the assembled calipers before I take the car off the jack
stands.  I recently replaced my noisy rear hub/bearing assemblies and this
time I just tied the proportioning valve in the fully compressed position
using a couple of nylon ties.  With the push rod lashed in the full up
position there is free brake fluid flow in both directions. If you set the
parking brake the wheels are locked and when it is released the wheels spin
freely.  The same is true if you have some one pump the brake to center
caliper travel.  As soon as the brake peddle is released the wheel spins
freely.

My question:  Is there any reason I can't just leave the proportioning valve
in the fully open position and drive the car that way?  Isn't this about the
same thing as installing the proportioning valve plugs that folks talk about?

Tom Leeth