Chevy Truck Parts :: 1947 - 1955 Chevy and GMC 3100 Truck :: Brake Parts :: Hydro Boost Brake Boosters :: 1947-53 Chevy Truck HydroBoost Power Brake Booster, Firewall Mount

1947-53 Chevy Truck HydroBoost Power Brake Booster, Firewall Mount

1947-53 Chevy Truck HydroBoost Power Brake Booster, Firewall Mount
1947-53 Chevy Firewall Mount Hydroboost Conversion
Part # HBK2-4753F
Weight 35.00 lbs
Our price: $599.99
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Brakes Type
CA Prop 65 Warning - cancer and reproductive harm

1947-53 1st series Chevrolet and GMC truck Hydro Boost® kit is even smaller then the 7" or the 8" vacuum booster in use currently. Generates 1000 to 1800psi to the calipers and fits a 1.125" bore size master cylinder. The Hydro-Boost® is powered by hydraulic pressure from the power steering pump. It requires 'no vacuum'. This has several advantages. No external vacuum pump required on low vacuum high performance motors. No 'small bore' master required. Firewall and valve cover clearance is increased. Frame mounted clearance is increased. Frame mounted Hydro-Boosts® are the same width as a master cylinder, giving additional exhaust clearance.

The Hydro-Boost® can be fitted any where a vacuum booster will fit. It can use stainless braided hoses or rubber type and brackets are available for most applications. The Hydro-Boost® uses fluid pressure from the existing power steering pump. The average power steering pump puts out from 800psi to 1400psi. The Hydro-Boost® uses this pressure that is always circulating through it, to convert to pressure to apply against the master cylinder.

The output of the Hydro-Boost® is affected by three factors.

  1. The pedal ratio. We prefer that the pedal ratio be between 5:1 to 6:1.
  2. Pressure output from the pump.
  3. Master cylinder bore diameter.

These are factors necessary to design the system that will work for a given application. It is imperative that the system be clean. Any residual metallic sediment laying in an old pump or steering box, will be floated up and through the system when the fluid comes through on start up. If any of this sediment lodges in the relief valve of the pump, there will be no pressure from the pump. This will result in hard steering and no power brakes. A filter or a new system is required to maintain any warranty.

Kit includes:

  • Hydro Power brake booster
  • Master cylinder
  • Proportioning valve, bracket and lines
  • Mounting brackets
  • Limited Lifetime Warranty

Stainless Hose kit with fittings sold separately, Add $259.99. Please specify.

Rubber Hose kit with fittings also available, Add $209.99. 

Note: These are remanufactured Bosch Hydro-Boost® units. These are not imported units commonly found. Hydro-Boost® is a registered trademark of the Robert Bosch Corporation