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Adjustable Proportioning Valve Block, Brake Distribution System

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PROPORTIONING VALVE MOUNTING BRACKET LINES AND HARDWARE
Adjustable Proportioning Valve Block, Brake Distribution SystemAdjustable Proportioning Valve Block, Brake Distribution SystemAdjustable Proportioning Valve Block, Brake Distribution SystemAdjustable Proportioning Valve Block, Brake Distribution System
Adjustable Proportioning Valve Block, Brake Distribution System

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What's in the Box

Adjustable proportioning valve and distribution block with mounting bracket  all in one. Features a rotary adjustment to regulate rear brake pressure and help maintain correct brake bias between front and rear. Distribution block connects to master cylinder and distributes brake fluid to all four wheels. Includes two stainless steel 3/16" brake line,3/8 24 flare nut brake light switch. Also available in chrome.

  • Rotary adjustment to regulate rear brake pressure and help maintain correct brake bias between front and rear
  • Connects to master cylinder and distributes brake fluid to all four wheels
  • Hard lines are 3/8"-24 threads on both ends of both lines
  • Includes:
    • Two stainless steel 3/16" brake line
    • 3/8" 24 flare nut brake light switch
  • Choose from Black or Chrome finish

Instructions (PDF)

Learn more about how adjustable proportioning valves work by reading our tech article. Brake System Selection.  

Note: This is a universal fit and that due to the differences in master cylinder castings, that it's possible the bottom of the master cylinder OR the bracket may require grinding/adjusting to fit the bracket correctly. The lines may need to be "tweaked" to fit correctly and due to the different fittings on master cylinders, adapter fittings may be required as well.

You may also be interested in:

Wilwood 260-8420 Lever Style Proportioning Valve
SKU-8352608420
                        

This proportioning valve has six preset adjustment points actuated by moving a lever allowing racers to adjust brake bias during a race without having to "look" where the knob position is. This lever "clicks" into the six positions for positive adjustment and the bright red lever is easily seen in a busy racing cockpit. Lever can be rotated 180 degrees for easy installation.

  • This ratchet style brake proportioning valve allows quick and accurate adjustment of brake bias
  • Universal design works on all race cars
  • 100 to 1500 psi range, up to 57% pressure reduction
  • It comes with 6 preset positions, has an aluminum body, rapid ratchet, and positive lock
  • Uses 1/8" NPT fittings

835-2608420 Instructions (PDF)

Adjustable Proportioning Blocks With Brake Light Switch
SKU-91031358
                        

This adjustable proportioning block allows you to run lines from the master cylinder to the block and then to the appropriate wheels. What is neat about it is that it also contains the proportioning valve and brake light switch. This dramatically reduces the amount of fittings needed and potential leaks.

The adjustable proportioning valve regulates rear brake pressure, helping to maintain correct brake bias between front and rear brakes. It is designed for dual bowl master cylinders. The distribution block connects to the master cylinder and distributes brake fluid to all four wheels. An easy to turn handle with directional arrows makes it simple to either increase or decrease rear brake pressure.

The block accepts 3/16" brake lines and the inlets and outlets on this unit are 3/8"-24 inverted flare females.  It has two inlets from the master cylinder, two outlets to the front brakes and one outlet to the rear brakes.  It includes five stainless steel 3/16" fittings and wiring pigtail for rear brake light switch. Mounts to any convenient location. This is not a direct factory replacement for original blocks. Some line modifications may be necessary.

910-31358 Instructions (PDF)

Learn more about how adjustable proportioning valves work by reading our tech article. Brake System Selection.  

GM Disc/Disc Proportioning Valve for 1/2-20, 9/16-18 Outlets
SKU-91031352
                        

These proportioning valves are similar to what GM used on many cars in the 70's. 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 four-wheel disc brake systems.

Includes hard lines to connect to a master cylinder with 1/2"-20 and 9/16"-18 outlets.

910-31352 Instructions (PDF)

Speedway Purple Proportioning Valve
SKU-91031353
                        

Allows easy adjustment of front-to-rear brake bias. Universal design works on all race cars. Has a 100 to 1500 psi range with up to 57 percent pressure reduction.

Includes two 1/8"-27 NPT to 3/8"-24 inverted flare fittings (not pictured).

Brake System Builder's Tip (Link) 

Wilwood 260-11179 Adjustable Proportioning Block
SKU-83526011179
                        

This block has the proportioning valve built-in to the rear brake ports and a stop light switch built into the front brake ports. All ports are 3/8"-24 inverted flare female.

  • Compact design simplifies mounting, plumbing, & wiring
  • Maintains full isolation between front and rear fluid circuits
  • Rear circuit has a single inlet and single outlet with the adjustable proportioning valve
  • Front circuit has a single inlet with two outlets

Proportioning Valve Installation Instructions (PDF)

Brake System Builder's Tip (Link)

Detailed Schematic of Proportioning Block 

Learn more about how adjustable proportioning valves work by reading our tech article. Brake System Selection.