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Adjustable Proportioning Valve Block, Brake Distribution System

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Specs
Sold in Quantity:
Kit
Finish:
-
MFG. Part #:
-
Notes
PROPORTIONING VALVE MOUNTING BRACKET LINES AND HARDWARE
Adjustable Proportioning Valve Block, Brake Distribution System
Adjustable Proportioning Valve Block, Brake Distribution System
Adjustable Proportioning Valve Block, Brake Distribution System
Adjustable Proportioning Valve Block, Brake Distribution System
Adjustable Proportioning Valve Block, Brake Distribution System

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Details

Reviews

Q & A

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.

Customer Reviews

Rated 2.5 out of 5 by 4 reviewers.
RATING BREAKDOWN
4 reviews
5 Stars
0
4 Stars
1
3 Stars
1
2 Stars
1
1 Star
1
RECOMMEND THIS PRODUCT:

Matty
Verified Purchaser
Verified Reviewer
Kearney nebraska

Split them and forget them

January 25, 2016
Nice set up wish you could change how it set under the master cylinder to the side but it's ok
Yes, I recommend this product.
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1934
Verified Reviewer
TEXAS

Better read the ''REVIEWS'', i didn't

December 26, 2015
I purchase a master cylinder and this proportioning valve, what a bad product , I wrote a review to tell them about this product , speedway call me, sent me a email , haven't heard back,they should really remove this product, if I wanted to have to drill and make this work I would have went to another brand , ''WISH'' I had read the ''REVIEWS'', I finally mounted the proportioning valve to my frame , and threw away the the chrome bracket, I even paid extra for. which is cheap chrome. I still make purchases from speedway cause they have great pricing on there products , but this one is bad for the Customer.
No, I would not recommend this product.
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Merchant Response:

Thanks for your feedback! We appreciate hearing from you. Your review has been passed along to our QC team to record and inspect the issue you found with this kit, as well as the manufacturer. We are really sorry for the misalignment / interference issue you found. It was great speaking with you on the phone, and we wish you the best of luck on your project!
Stovebolt Scott
Verified Reviewer
Houston

A few short of a good

November 10, 2015
A few issues: The plate that it is supposed to mount to hits the top of the brake light switch, which the top of it is slightly taller than the actual block for the proportioning valve. I added two thick washers between the two, solving the problem, but it wasn't going to work well out of the box. The supplied input lines were OK, but they are installed so close to the brake light switch and the proportioning valve that a normal tubing wrench is too bulky to fit. A open end wrench does not fit. I had to ruin stubby combination 3/8 wrench by cutting an opening in the box end side for the tubing, and its thin walls were sufficient to allow me to tighten the input lines. The Rear brake output is located on the rear of the valve block, which when installed in a car is extremely awkward to get the line installed. Luckily the wrench I made in prior step helped me with slight angle tweaks to the line I just made to get it lined up to screw in, but it was all by feel. The valve itself says Increase / Decrease and there are no directions. I thought this meant "Increase rear brake" so I adjusted that way. But that is NOT how it works, INCREASE means REDUCE rear brake. Other than those problems, now it seems to working well and solving the problem I had of adding new brake components to an older classic car and having the brakes work properly.
Pros:
  • works
Cons:
  • Rear Out Fitting Hidden
  • In Fittings Location Bad
  • Valve Nomenclature
No, I would not recommend this product.
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rustorations
Verified Purchaser

Nothing fit together

October 04, 2014
The products individually are great, but they come as a kit and NOTHING fits together as it should. The proportioning block doesn't bolt to the bracket. (I had to drill my own holes). The stainless lines won't not line up with the proportioning block and master cyclinder. I have to make new lines now so I can use it. :(
No, I would not recommend this product.
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Merchant Response:

Speedway Motors Customer Service team has issued this customer a gift card for the troubles experienced with this item. We have since updated this item's product page with an image showing how these should be properly installed as well. We apologize for any inconvenience this may have caused and are always happy to help.
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Product Q&A

4 questions : 4 answers

1 answers

Is the bracket chrome on the "chr" model, or just the proportioning valve?

Yeahitsfast
July 03, 2014

Is the bracket chrome on the "chr" model, or just the proportioning valve?

Answers

July 07, 2014
EricM
The bracket and the proportioning valve is chrome on the -CHR model.
1 answers

From abs to no abs I am changing out my abs to non abs. I have two lines coming out of my master and 1 to each wheel off of my abs unit. I was wondering how many lines out are on this unit?

NickAdam
Victorville, CA 92392, USA
March 07, 2014

From abs to no abs I am changing out my abs to non abs. I have two lines coming out of my master and 1 to each wheel off of my abs unit. I was wondering how many lines out are on this unit?

Answers

March 10, 2014
EricM
This valve has one inlet for the front brakes and two outlets for the front. The rear has one inlet and one outlet port.
1 answers

What is the difference between the adjustable proportioning valve and a combination valve? I'm installing yalls 9106002 universal power brake booster and I'm needing a valve for the disc/drum set up.

Boomer
Oklahoma.
May 30, 2015

What is the difference between the adjustable proportioning valve and a combination valve? I'm installing yalls 9106002 universal power brake booster and I'm needing a valve for the disc/drum set up.

Answers

June 01, 2015
Eric
Expert
This adjustable proportioning valve would be a great addition to your pedal assembly and disc/drum brake set up. The term combination valve can mean several things depending upon the particular valve. This 91031367 proportioning valve would be a very good choice for you brake system.
1 answers

Hi, I purchased & just received item 910-31367. 1. The New Proportioning Block has too many Outlets, what fitting do I use to block off the extra port ? 2. The Rear Brake Line in my truck connecting to the old Master Cylinder is a 1/2" flared fitting. 3. What Adapter Fitting do you have that will fit my 1/2" Male Threads Fitting to the 3/8 Port on the New Proportioning Block ?

Sam
February 09, 2016

Hi, I purchased & just received item 910-31367. 1. The New Proportioning Block has too many Outlets, what fitting do I use to block off the extra port ? 2. The Rear Brake Line in my truck connecting to the old Master Cylinder is a 1/2" flared fitting. 3. What Adapter Fitting do you have that will fit my 1/2" Male Threads Fitting to the 3/8 Port on the New Proportioning Block ?

Answers

February 10, 2016
Eric
Expert
Plug part number 9103186 can be used to block one of the outlets for the front brakes if needed. Sorry we do not offer an adapter that will allow you to connect your current 1/2" thread brake line to this proportioning block. If your rear brake line is 3/16" OD then you will need to cut the line and remove the 1/2" flare nut so that you can use one of the supplied nuts and double flare the line. If your rear brake line is 1/4" OD then you will need to cut the line to remove the 1/2" flare nut, then use 7/16" flare nut 91031819 and double flare the line. Then you will need adapter 9103183-3/8 in order to connect the 7/16" nut to this block.
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Wilwood 260-8420 Lever Style Proportioning Valve
(Part #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
(Part #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
(Part #91031352)
                        

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 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)

Item Details

For M/C with 1/2"-20 and 9/16"-18 outlets.
Speedway Purple Proportioning Valve
(Part #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.

Brake System Builder's Tip (Link) 

Wilwood 260-11179 Adjustable Proportioning Block
(Part #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.