Description: This is a NEW hydroboost, not rebuilt. It is set up for inverted installation in a C2 Corvette. This is set up set for your OEM brake pedal height and is adjustable. This is not a "universal" hydroboost, it is designed to fit the C2 firewall bolt pattern and pocket requiring no modifications to the firewall or the hydroboost mount. It is a direct bolt in installation. You will need a short booster input MC (dimple input) to match the hydroboost and the '78 Vette disc/disc power brake MC is dimple input. ***The first four installed pics are showing it with an LS3. The next two are an angled up unit required to clear a big block. If you have a big block send me pics and ask about the angled up unit. ***Discuss this with me before you buy it if you have a big block motor as I have some optional designs for clearance depending on your specific set up. ***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. ***For cars where the OEM PS pump and gear are retained you can adapt the OEM PS hose hardline to match AN-6 hose fittings by cutting the hard line and brazing on a bung (Aeroquip FBM 2872 availabe from Summit Racing and other sources). ***For greater amount of engine clearance on an inverted hydroboost you may want to use banjo fittings for the pressure ports on the hydroboost. For maximum engine clearance I can clock this unit 90* for an additional $100 and this directs the hoses towards the driver side fender well (see my other listings for the 90* MC adapter and longer stainless input rod used). 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 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 the iron '77-'80 Corvette MC is a frequent choice. The MC must have the shallow dimple on the piston for the booster rod. ***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 C2 & 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 and 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, 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.
Price: 589.48 USD
Location: Pilot Point, Texas
End Time: 2024-08-11T23:50:38.000Z
Shipping Cost: 26.25 USD
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Returns Accepted: ReturnsNotAccepted
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Country/Region of Manufacture: United States
Manufacturer Part Number: CPB-21
Brand: Custom Power Brake
Manufacturer Warranty: No