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Wilwood 260-11179 Adjustable Proportioning Block

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Specs
Centerline of Holes:
2.68
Material Type:
Aluminum
Overall Width:
1.30
Overall Length:
5.00
Sold in Quantity:
Each
Overall Thickness:
4.30
Finish:
Anodized
Inlet fitting:
3/8"-24 IFF
Outlet Fitting:
3/8"-24 IFF
Garage Sale:
No
Notes
All ports are 3/8"-24 inverted flare female.

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Watch the video below to learn more about the differences in brake lines, flare types and fittings you may want to consider before plumbing away on your current chassis project.

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Details

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Q & A

What's in the Box

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.   

Specs

 

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Wilwood 290-0632 Hi-Temp 570 Degree Racing Brake Fluid
                        

Wilwood's specially formulated Hi-Temp 570° Racing Brake Fluid has a minimum 570 degree dry boiling point to withstand the severe heat requirements of automotive racing. Hi-Temp 570's low viscosity allows easy bleeding of your brake system, eliminating aeration of the brake fluid caused by foaming due to excessive pumping of the pedal. 

This high temp brake fluid comes in a convenient 12 ounce container hermetically sealed to guarantee against unwanted absorption of moisture which can drastically lower the fluids boiling point (fluid from larger containers tends to become contaminated with moisture, lowering its boiling point and making it unsuitable for racing applications). 

  • Dry Boiling Point:  573° F
  • Wet Boiling Point:  313° F
45 Degree Double Flaring Tool
                        

Use this handy tool to double flare mild steel brake lines just like the brake shop does. This tool makes 45° flares only. For 3/16", 1/4", 5/16", 3/8", 1/2" mild steel line only, NOT to be used with stainless steel line.  If using 37° AN fittings with stainless steel line, use 910-89524.

Learn more about flaring lines for our automotive fittings by reading our tech article. The Principles of Automotive Fittings

Wilwood 260-8419 Knob Style Proportioning Valve
                        

This device lets you adjust the front-to-rear braking balance by proportionally decreasing the rear (or in some cases the front) brake line pressure. Can also be used to adjust individual front wheel braking in dirt track applications. Valve weighs only 5.2 ounces and has two .25" side mounting holes spaced 1.00" apart.

  • Allows easy adjustment of front to rear brake bias
  • Universal design works on all race cars
  • 100 to 1500 psi range, up to 57% pressure reduction
  • Accepts 1/8"-27 NPT fittings

Compensates for weight transfer to the front wheels during braking. All factory brake systems allow for this in some fashion. An APV allows you to "fine tune" a street or race brake system and thus prevents severe rear brake lockup under moderate-to-heavy braking.

835-2608419 Instructions (PDF)

Adjustable Proportioning Blocks With Brake Light Switch
                        

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.  

Dual Outlet Master Cylinder Steel Dual Brake Line Kit
                        

This is a pair of steel or stainless steel brake lines intended to simplify plumbing from the master cylinder to a proportioning block, such as our 910-31358 or 835-26011179.

  • Features tight 90° bends at the master cylinder end
  • Both ends of both lines are 3/8"-24 inverted flare nuts
  • The longer of the two lines measures app. 12" from the bend to the end
Dual Outlet Master Cylinder Stainless Steel Dual Brake Line Kit
                        

This is a pair of steel or stainless steel brake lines intended to simplify plumbing from the master cylinder to a proportioning block, such as our 910-31358 or 835-26011179.

  • Features tight 90° bends at the master cylinder end
  • Both ends of both lines are 3/8"-24 inverted flare nuts
  • The longer of the two lines measures app. 12" from the bend to the end