GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets
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These proportioning valves are similar to what GM used on many cars in the 70s. They are non-adjustable and may require an adjustable valve in the rear brakes (if needed). Block incorporates metering (for front brakes) and proportioning (for rear brakes) into one unit. For use with front disc, rear drum brake systems.
Includes hard lines to connect to a master cylinder with 1/2"-20 and 9/16"-18 outlets.
For M/C with 1/2"-20 and 9/16"-18 outlets.
NotesBottom Front Port: 3/8"-24 IFF threads - goes to one front brake
Top Front Port: 3/8"-24 IFF threads - goes to one front brake
Middle Top Port: 1/2"-20 IFF threads - comes from master cylinder
Rear Top Port: 7/16"-24 IFF threads - comes from the master cylinder
Rear Most Port: 9/16"-18 IFF threads - goes to rear brakes
Outlet FittingBottom front/Top front are 3/8"-24 IFF (to font brakes), Rearmost port is 9/16"-18 IFF (to rear brakes).
NotesIncludes hard lines with fittings, hardware, bracket, and brake light switch. This is a combo valve (metering for front/proportioning for rear) into one valve. Residual valves NOT built in.
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Q & A
Tim demonstrates the brake assembly with a Wide 5 drum brake and Speedway's new self-energizing backing plate.
Tim talks about brake booster adjustment.
We get a lot of questions about brake kits so Tim gives a brief overview of disc brake setups.
Anytime you purchase a new master cylinder, it's important to remove all the air before installing it. Here is a very helpful video tutorial that will show you how to bench bleed a new master cylinder.