ConversionsxxDisk Brake Conversionsx Hydroboost Brake-Assist Conversionsx

Hydroboost is a superior brake-assist system that takes the place of a traditional vacuum-power brake booster, and replaces it with a fluid driven system.  Hydroboost is commonly used in diesel engines applications and with vehicles that that need better-than-ordinary braking ability, such as many vans and trucks that are 3/4 ton or larger. 

Hydroboost is required with any diesel conversion (as diesels to not produce adequate vaccuum for a traditional vaccum booster), or applications where you need superior brakes suchas having significantly larger tires.  Most of our rock crawlers, however, use traditional brake systems.  Hydroboost will stop you better than most 4-wheel disk brakes even if you leave your factory drum brakes in the rear - it is that powerful.

Hydroboost is driven off the power steering pump.  Because of this, hydroboost is recommended for use with only high pressure pumps such as most Chevy/Saginaw pumps but NOT with Toyota pumps.  Furthermore, power steering pumps specifically designed for hydroboost can be found which use two return ports, but using a hydroboost-specific power steering pump is not necessary.

The routing for hydroboost is as follows: 

1) The high pressure outlet from the powersteering pump goes to the hydrobooster which is mounted between the firewall and brake master cylinder (as seen below).

2) The booster itself has two return lines:

• A low pressure line that is routed back to the powersteering pump (or is T'd into the same return as the power steering box) or can be routed to a remote fluid reservior (if required) then back to the pump. 

• A second return line from the booster is still "high pressure" and goes to the high pressure port of your power steering box.  Your power steering will still be exceptional even with hydroboost installed. 

Feel free to ask if you have more questions about this..
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