When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Price: $589.48
This is aNEW hydroboost, not rebuilt.It is set up for inverted installation in a \'55-\'57 Chevy. The item pictured in the first picture isthe hydroboost being sold on this listing.The following three pictures are showing a different setup using a offset booster bracket to clear a big block. Then the next three show a similar unit installed in a \'55 Chevy by another ebay member who worked with me on designing this fit. The eighth pic is of a blown big block where we rotated the hydroboost up to clear and installed an adapter to level the MC. 90* rotation and MC adapters are also available and should be used with the LS motors (see my other listings or request I invoice you for the adapter where required. The 9th and 10th pics are of a customer\'s \'57 with an LS2 swap where he used banjo fittings on the hydroboost to clear the motor but you can see in the pictures that there would be more clearance if the 90* rotation and adapter were used when using an LS motor.
This isset upwith a custom welded steel firewall mount that will match your existing firewall bolt pattern and the rod is both set for your OEM brake pedal height and is adjustable. If you currently have manual brakes you will need to drill another 3/8 hole in your brake pedal 1\" lower on the pedal where you will attach the clevis to have this at the correct rod angle/ratio.
***If you run a big block with tall valve covers and need the extra valve cover clearance let me know and I can rotate this unit 90* to provide more clearance with additional parts/work for $100.
***For inverted hydroboost the return nipple will point towards the motor and if you require greater clearance for the return line you 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.
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.
****Allow me to dispel some myths...#1There simply are no vacuum boostersthat 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 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.
Many power brake master cylinders can be used on this hydroboost and theiron \'77-\'80 Corvette MCis a frequent choice and has the shallow dimple on the piston that is compatible with the shortinput rod in the booster.***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 vehicle you\'d like to set up in a similar fashion 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 Camaroand I\'ve currently mapped out a \'57 Buick, \'55-\'57 Chevy and Jeep TJ.
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, Australiaand South Africa, but please contact me prior to purchasing so we can work out acceptable shipping arrangements. I will provide you with a shipping quotefor you to considerPRIOR to your purchase. I will only accept paypal on purchases outside the US. I request that in the text of your message you indicatethe country and postal codeyou 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,\'57Chevy, \'57 Buick.