NEW '67-'70 Mustang Hydroboost, Power Brake Booster

Description

****New one piece brake rods I've had machined now let you run this without alterations to the '67-'69 power brake pedal for either the non-angled or angled mount versions and it's compatible with auto and standard transmissions. Because they are one piece there is no pedal height adjustment at the brake rod.
****My new brake rods will give OEM pedal height using a foam firewall gasket. If you want to drop the pedal height contact me about nitrile firewall gaskets I had made which don't compress and can be stacked between the booster and firewall.
****This specific unit is
not
compatible with tall valve covers on the 429 or with the Coyote motor but contact me if that is what you are trying to work with as I have developed a solution which has been test fit and demonstrated at SEMA '19.
This is a new
(not rebuilt)
hydroboost and mount set up in two different versions for the '67-'70 Mustang, it also fits the Cougar.
The master cylinder is not being sold, it is shown for demonstration purposes only.
The hydroboost will bolt straight to pedal assembly bolt holes in your firewall and if your car was manual brake there is a hole at the bottom of this mount where you will be able to drill through your firewall to bolt it up like the OEM power brake cars. If you have a pedal assembly and you don't know if it was set up for manual or power brake I can tell you manual brake assemblies have threaded inserts where it bolts to the firewall and the power brake assembly does not as the booster was mounted with it's own studs. Please note that manual brake cars will need the pedal assembly spread a little as Ford ran 3.2 bolt centers on the master cylinder but spread the assembly to 3.45" for the vacuum booster. I have slotted two of the holes to help you fit this mount to either pedal assembly with minimal effort. As this was set up on a power brake Mustang there is the chance that like fitting a  vacuum booster to a manual brake car that you may need to open the hole up on the firewall to install this and I can provide a factory diagram if required... but... I think this will slip in there;) This hydroboost is set up to be installed inverted for greater valve cover clearance. Both non-angled and angled versions clear the shock tower and the OEM shock tower brace.
***Use of the power brake pedal with the 5" distance from the pivot bolt to the lug are required. Aftermarket pedals are available from other sources.
***Specify when order if you want the angled or non-angled mount.
***If you have a pedal with 4.5" distance (1970) it will need to be modified (I can provide info) or replaced with an aftermarket pedal that has the 5" distance.
***
For inverted hydroboost the return nipple will point towards the motor and if you require greater clearance for the return line y
ou can search on ebay for the AN-6 "spittier fitting" and use that to replace the return nipple.
When using black rubber return line get a 90* pushlock AN-6 fitting and install that on the return line.
If you are using stainless braid line then just use a return line with the 90* AN-6 fitting at the hydroboost end.
***Regarding use of replacement return hose fittings on the booster:
When the booster is inverted or clocked on the mount for clearance to the motor the return nipple points the hose at the header or into the inner fender depending on the vehicle and set up. If you don't use a banjo fitting there and use an AN-6 Spittier fitting then you need to know to before you install it to take a #35 drill bit (or 0.110") and make sure it passes through the orifice before you use it and drill it if it doesn't. 0.110" is OEM ID for Bosch return fittings and anything undersize can cause slow pedal return.
The first four pics show the hydroboost set up with a non-angled mount.
The next two pics show the hydroboost set up on the angled mount.
The second to the last pic shows the angled up version of the hydroboost installed in a customer's '69 Mach I with a 428 where he also used a hydraulic clutch. Thanks Jeff!
This hydroboost will easily clear a Windsor 351 motor and my angled version fits with a 428 with stock valve covers. The widest point you will need to clear will be the width of your master cylinder base where it bolts to the hdydroboost and that will be at 6.9" from the firewall.
The master cylinder,
shown for demonstration only
, can be looked up as GM MC #390572, or 25-25044, or interchange 130.66044. It has a 1" bore with two 1/2-20 inverted flare ports and a dimple piston for the short booster input rod.
***Note that
Wilwood now has a new Compact Master Cylinder measuring only 6.55"
so it should fit even better than the GM aluminum and plastic MC. If it is like their other MCs the bore adapter for the short booster input rod will be too long, causing excessive pre-load so plan to shorten that adapter for the correct pre-load.
>>>>>A foam firewall gasket
should be used
and can be sourced at Jegs with part # C9ZZ-2022.
The pressure ports on the hydroboost are 18mm O-ring for pressure in and 16mm O-ring for pressure out. Pressure hose installs from the pump to the 18mm port and then from the 16mm port to the rack pressure in port. Your return line gets a Tee fitting (3/8" brass hose barb) and the hydroboost return line attaches to the side barb of the Tee leaving the straight flow from the rack to the pump on "the run" side of the Tee fitting. Use of a serviceable PS filter such as Cardone #20-0038F is highly recommended and should be installed on the rack side of the Tee fitting in the return line.
***Note as Ford pumps produce lower pressure and flow than the Saginaw pump this hydroboost was designed for so I recommend using a Saginaw pump swap kit. You will get best results from the hydroboost if running 1500psi although it will operate at 1345psi but lower pressure reduce the amount of fluid reserved in the accumulator for your back up in event of engine stall. I do know guys running these off Ford pumps but I think you would be happier running Saginaw. If you are concerned that running 1500psi and 3-3.2gpm is going to make your steering rack twitchy then know that Heidt makes an adjustable flow valve that can be installed in the pressure line from the hydroboost to the steering rack and that valve will dump pressure into the return circuit allowing you regulate how much goes to the rack.
Tech, info on building pressure hoses, and pictures of custom hydroboost installations as well as my contact info can be viewed on-line at CustomPowerBrake or BadAspBrakes.
****Allow me to dispel some myths...
#1
There simply are no vacuum boosters
that will give you the same dramatic increase in line pressure at the caliper that hydroboost will provide. #2 The largest vacuum booster you could possibly fit would only give you about 1,700 psi at the front caliper and that is if you had room to fit it and the engine produced the vacuum it was designed for. If you have a low vacuum motor and a 7" dual diaphragm  booster (like a customer of mine with a built 5.7 Hemi who tested line pressure with a gauge) you will only get 1,000 psi at the front and 800 at the rear calipers. You need about 1,600 psi up front for disc. After installing my hydroboost he tested it at what you can see in my last pic above. Got it? ;) Thats an increase of 1,400psi at the front caliper at idle. 2,400psi..... yes, your pedal will be lighter;) John's car is a '37 Plymouth Tudor and he hauls a trailer for his two Harleys. His comment to me after the installation of the hydroboost was "this thing could stop freight trains". Thanks for the testing, pics and feedback John! It's what dispels myths. #3 Installing a hydroboost does not just make your pedal easier to press, ask anyone who has hydroboost installed. I have had a lot of customers tell me that swapping to hydroboost was the best modification they made to their vehicle and should have been the first. Think about it for a minute.... is it really going to help your braking if you switch from 11" disc to 13" and go from single piston calipers to four piston if you still are only going to have 1,000 psi at the front caliper when you need at least 1,600 psi? Yes, the braking would improve over what you had but you still don't have the line pressure and only changing the booster to hydroboost is going to give you 2,400 psi. To my knowledge, not even electric boosters will give you that much pressure and 2,600 psi is obtainable with the right master cylinder.
Installation of hydraulically boosted brake systems will increase your line pressure up to a maximum of 2,600psi
(as tested and I have a gauge reading to demonstrate pressure at idle)
depending on the master cylinder you select and the other components in your brake system. Consequently your brake system must be in top shape to handle increases from normal 1,100-1,600psi.
***Be sure the power steering pump you are using will be adequate to run with hydroboost which typically require 1,300-1,500psi and 2.5-3.5gpm. This hydroboost is not designed to be operated with power steering pumps exceeding 1,500psi. It is compatible with ABS.
If you have a different vehicle you'd like to set up with a custom firewall mount just shoot me a message and I'll work with you if I think it can be done.
I have set up C3 Corvettes, Chevy S10s, Toyota FJ 40s, Jeep Commandos, Wranglers, CJs, and the M715 as well as the full size Jeep Wagoneers, Cherokees and J series trucks, Scout II, Ford Ranger, F150, '67 Camaro, '70-'77 Camaro, '70 Chevelle, and I've currently mapped out a '57 Buick, '55-'57 Chevy and Jeep TJ, ZJ, MJ, XJ, '70 Chevelle, Toyota T100/Tacoma.
Shipping is quoted for the US only. I have shipped these to Thailand, Mexico, Russia, New Zealand,
Brazil, Panama, Latvia, Spain,
Turkey, Sweden, Quatar, Norway, France, Italy, Germany, Denmark, Dubai, UK, Canada, Greenland, Iceland, Australia and South Africa, but please contact me prior to purchasing so we can work out acceptable shipping arrangements. I will provide you with a shipping quote for you to consider PRIOR to your purchase.  I will only accept paypal on purchases outside the US. I request that in the text of your message you indicate
the country and postal code
you wish the unit shipped to.
Regarding feedback, I will leave feedback for the purchaser after I have received feedback.
Disclaimer:
Hydro-Boost is a registered ® trademark of the Robert Bosch Corporation. All products herein are modifications and not directly or indirectly affiliated with the Robert Bosch Corporation unless noted. Custom Power Brake (aka Sterlingworth16) is not affiliated with Bosch. All products herein are designed for off road use only and are not DOT certified. The process to meet DOT certification is extremely lengthy. To my knowledge, no other aftermarket modifier of hydroboosts has their units DOT certified for street use either. Any purchase of product and/or use of tech related to these products constitute the understanding that brake line pressure will be dramatically increased and the acceptance of liability or risk related to use.
Key words: hydrobooster, hydro boost, hydro-boost, hydro-booster, hydraulic booster, brake booster, astro van, safari van, Jeep CJ, Jeep YJ, Jeep Wrangler, Toyota FJ40, Jeep TJ, '55, '56,'57 Chevy, '57 Buick.