Speedway 1928-31 Ford Frame Mount Power Brake Pedal Assembly

Description

Universal power brake upgrade that retains the brake pedal under the floor, automatic transmission only, Mounts to inside of frame rail or boxing plate to fit multiple vehicles, bracket mounts 2" off of frame, Features a 7" dual diaphragm brake booster, 1" bore Corvette style master cylinder w/ 1/2"-20 & 9/16"-18 IFF outlets, and 10-1/2" brake pedal assembly, Brake pedal is 1/2" steel plate and offers a 6 to 1 pedal ratio, round rubber pad included, From center of pedal pivot to front of mounting bracket measures 1.50"
Speedway 1928-31 Ford Frame Mount Power Brake Pedal Assembly
Sku # 91664062
Mfr. Part # 91664062
Condition
New
Brand
Speedway Motors
Sold
Kit
Details
Info
Universal bracket assembly converts under floor mount master cylinder applications to power brakes
Power brake pedal assembly mounts to inside of frame rail or boxing plate
Retains through the floor pedal for period looks while improving braking safety
For automatic transmission applications only
Pedal ratio is 6:1 for ease of braking and works with all disc/drum setups
Corvette style cast iron master cylinder provides line access from either side of unit and includes port plugs
Master cylinder utilizes 1-inch bore with dual reservoirs for additional brake system safety w/ 1/2"-20 & 9/16"-18 IFF outlets
Dual diaphragm power brake boosters are compact and works with any engine providing at least 17 in/hg of vacuum
Power Brakes for Your Early Hot Rod
There is no denying that early braking systems on the cars we love to build, like Model Ts, Model As, and other pre-war rides, were rudimentary to say the least, and that is putting it lightly. These early mechanical brake systems may have been OK for the speeds of the time, but drop a hopped-up Flattie in it, or even more power via a small-block Chevy, and you are really asking for trouble when you must hit the “whoa” pedal after using too much of the “go” pedal.
Updating these classics to “juice” brakes (hydraulically actuated) has been the thing to do for decades and we are here to make that conversion easier for you. From disc and drum conversions, brake lines, proportioning valves, fittings, and more, Speedway Motors has everything you need to convert to hydraulic brakes on your pre-war hot rod, including this universal frame mount brake booster and master cylinder combo. These are the basis for your new hydraulically actuated braking system in your pre-war car and can easily be used to retain that period looking under floor master cylinder/pedal assemblies in ’40s and ’50s cars and trucks when under dash or engine compartment room prevents adding a power brake booster and relocating the master cylinder to the engine compartment firewall.
A Power Brake Conversion That Fits Most Early Hot Rods and Trucks
Adding power brakes to a pre-war hot rod is not always easy. Most of these original brake systems featured a mechanical brake system and early hydraulic conversions fitted the brake master cylinder under the floor, which did not always provide the correct leverage for optimal braking. Upgrading to power brakes using our universal brake booster and master cylinder with frame mount pedal assembly is a much better solution. The manual to power brake conversion retains the through the floor pedal assembly for period looks, but provides a solidly built mounting bracket, a compact power brake booster, and dual reservoir brake master cylinder that works with any open C-style or boxed frame member. The period look brake pedal passes through the floor and works with automatic transmission applications only. This kit works great in conjunction with a front disc brake upgrade as well.
Our frame mounted power brake booster and master cylinder combo kit features a zinc-plated 7-inch dual diaphragm power brake booster that provides more assist than the standard single diaphragm brake booster and yet is only 5-1/4-inch thick, allowing the brake booster and master cylinder combo to fit within your hot rod’s frame with ease. The power brake system works with engine vacuum of at least 17 in/hg or can be paired with an for those with aggressive cam profiles that produce insufficient vacuum. The power brake booster assembly includes mounting hardware for the booster and the master cylinder that mounts to it. Additionally, the booster includes an adjustable master cylinder pushrod and threaded pedal rod with lock nut for pedal height adjustment. The included brake booster check valve uses standard 3/8-inch brake booster vacuum hose for your engine’s vacuum source (carburetor base plate/spacer or intake runner vacuum tree).
The included Corvette-style brake master cylinder features a 1-inch bore with front and rear divided fluid circuits for the modern safety of a split braking system. Our master cylinder is designed for disc/drum applications with ports on both sides so that you can route your brake lines inboard or outboard however you wish for function and aesthetics. This brake master cylinder is ideal for a front disc brake upgrade solution. The ports are 1/2-20 inverted flare for the front circuit and 9/16-18 inverted flare for the rear circuit. Inverted flare plugs are included to block off the opposite side unused ports. For those crafting their own 3/16-inch brake lines we offer a to allow direct connection. If you choose to utilize pre-made lengths of 3/16 brake line our in 1/2-inch and 9/16-inch sizes will allow direct connection to our master cylinder without having to cut and flare brake lines.
Universal Mounting Solution Fits Any Frame Style
We have designed our frame mount under floor universal power brake kit to work with just about any frame configuration. As shipped the main mounting bracket will work with any stock or aftermarket rectangular boxed frame member, or an original C-channel type frame that has been boxed with steel plate. If your C-channel frame has not been boxed we provide an additional bracket attachment/extension that fits within the C-channel, providing a 2-1/4-inch mounting extension, that can be bolted or welded inside the C-channel to allow the main mounting bracket to attach to and sit at the proper spacing. We include all mounting hardware for both brackets, so if you do not own a welder installation takes nothing more than some careful measuring and a sharp drill bit! The brake pedal itself is a 6:1 pedal ratio and includes a 3-3/8-inch diameter classically styled round rubber brake pedal pad. Our kit makes a manual to power brake conversion easy, no matter the vehicle.
Charts
(GIF)
Installation Tips
A brake light switch is not included; a can be installed in the unused front master cylinder outlet by using an to operate brake lights
A brake proportioning valve will be required and is sold separately, we suggest an or an
A 3-3/8-inch round rubber brake pedal pad is included in the kit that is threaded 1/4-inch NPT and a is available
Pedal arm may need to be bent left or right to line up with the proper pedal position for your vehicle
DOT 3 or DOT 4 brake fluid is suggested
The pedal assembly (with the booster and master cylinder attached to it) will measure 17-1/8" from the center of the pedal pivot to the rearmost point of the master cylinder
The forward-most point of the main mounting bracket is 1.5" forward of the brake lever pivot
The brake pedal arm measures 10.5" from the center of the pivot point (and has a 6-to-1 pedal ratio) and is 1/2" thick
The widest point of this assembly will be at the booster, which will be 7.5"
The 4-bolt bolt pattern where the main bracket attaches to the frame rail (or the secondary bracket) is 2.25" x 3.5"
The secondary bracket measures 3.75" x 11" and has a longer bolt pattern where it might attach to the frame rail. That 4-bolt pattern is 2.5" x 9.75"
Mounting bracket sets off frame rail 2" for clearance
Brake booster Bolt Pattern is 3-3/8" square
Master cylinder bolt hole spacing is 3-3/8" center to center
Specs
Sold in Quantity
Kit
Outlet Count
Tandem
Reservoir Type
Integral
Master Cylinder Material
Cast Iron
Bolt Hole Pattern
3.38" x 3.38"
Hardware Included
Yes
Balance Bar
No
Brake Pedal Rod Included
Yes
Pedal 1 Ratio
6:1
Brake Booster Included
Yes
Brake System Type
Disc/Drum
Position
Frame
Master Cylinder Mount Type
Reverse
Master Cylinder Count
1
Pedals Included
Brake
Outlet Fitting
1/2"-20 IFF
Outlet Fitting 2
9/16"-18 IFF
MFG. Part #
91664062
Finish
Raw
Brake Booster Type
Vacuum Diaphragm Dual
Master Cylinder Bore Size
1 Inch
Brake Booster Diameter
7 Inch
Pedal Length
10.5
Reviews
Nice assembly, easy to set up
Rated
by John on December 26, 2021
Summary:
Comes with extra brackets for a easy install
It's a great piece
Rated
by Phil on September 22, 2021
Summary:
It's a brake booster
Yes, I recommend this product.
Great product and price
Rated
by Rj on April 05, 2021
Summary:
Very happy with transaction and product quality
Yes, I recommend this product.
YES
Rated
by JACK on January 09, 2020
Summary:
32 FORD
Cons:
NEVER GOT MY SPEEDY 10 DISCOUNT ON ANY OF THE SP
Pros:
PARTS WERE GREAT
Yes, I recommend this product.
great service and item
Rated
by rolf on July 30, 2019
Summary:
improve brake on my 31 ford
Yes, I recommend this product.
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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 70 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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