Polished Adjustable Proportioning Valve Block for 3/16 Brake Line

Description

This adjustable proportioning block serves several purposes which dramatically reduces the amount of fittings needed and reduces the potential for leaks, Dual front brake line outlets eliminates the need for a T fitting for the front brakes, Built in pressure switch allows you to conveniently operate your brake lights, 3/8"-24 inverted flare female inlets and outlets allow the use of common 3/16" brake lines for a quick nand easy installation, Five stainless steel 3/8"-24 flare nuts and a wiring pigtail for the brake light switch are included making this a value that can't be beat
Polished Adjustable Proportioning Valve Block for 3/16 Brake Line
Sku # 91031358-POL
Mfr. Part # 91031358-POL
Condition
New
Brand
Speedway Motors
Sold
Each
Details
Notes
The brake block is plumbed as follows. The port on the proportioning valve end is the "out" line for the rear brakes. The port between th proportioning valve and brake light switch is the "in" line for the rear brakes. The port in front of the brake light switch is the "in" line for the front brakes. The port on the brake light switch end is the "out" line to the passenger front brake while the port on the bottom is the "out" line to the driver front brake.
This block has individual lines for the front wheels and each line would require a residual valve if the master cylinder is mounted under the floor on the frame rail. 2 psi for each front if it has disc brakes and 10 psi for drum brakes. It still will require a residual valve to the rear with the same psi, depending on the brake type used.
Brake System Builder's Tip (Link)
Info
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.
Learn more about how adjustable proportioning valves work by reading our tech article. Brake System Selection.
Charts
(PDF)
WARNING: Cancer and Reproductive Harm -- p65Warnings.ca.gov
Specs
Material Type
Aluminum
Sold in Quantity
Each
Finish
Polished
Color
Natural
Notes
Includes two adapter fittings (7/16"-24) and (5) 3/8"-24 brake line nuts.
Thread Pitch
3/8"-24 IFF
Overall Height
1.75
Overall Width
1.00
Overall Length
4.00
Brake System Type
Disc/Drum
MFG. Part #
91031358-POL
Proportioning Valve Type
Knob Adjustable
Proportioning Valve Location
Frame Mount
Port Quantity
4-Port
Pressure Safety Switch Included
Yes
Reviews
nice size
Rated
by Jeff on May 23, 2021
Summary:
works great having everything in one product. saved time plumbing the brakes.
Yes, I recommend this product.
great for custom built brake system
Rated
by mustangtoo on April 10, 2021
Summary:
I haven't installed it yet but, it looks to be just what I need for a custom application. Since the front and rear brakes, master cylinder, weight distribution of the vehicle etc. are all unique to this build this part should allow me to dial in the brakes for best performance.
Yes, I recommend this product.
Well made easy to install
Rated
by Fordcat on March 15, 2021
Summary:
Bought the adjustable combination valve to convert from manual to power brakes on my 59 Fairlane
Yes, I recommend this product.
I would buy this product again
Rated
by jerry50 on February 18, 2021
Summary:
works well in regulating rear brake pressure.
Yes, I recommend this product.
Perfect
Rated
by ChopperClint on January 17, 2021
Summary:
Fit perfectly and and works great on my rat rod
Yes, I recommend this product.
Related Items / Suggested Parts
Wilwood 260-11179 Adjustable Proportioning Block
Dual Outlet Master Cylinder Stainless Steel Dual Brake Line Kit
Dual Outlet Master Cylinder Steel Dual Brake Line Kit
3/8 Inch-24 Inverted Male Flare Plug for Master Cylinder Ports
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About
Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 69 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.
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