question: Hydroboost braking system

Hydraulic brake assist using the power steering pump, called hydroboost.

Currently I have a Corvette master cylinder with 7" dual diaphram booster.
But because I'm running a blower motor it robs the booster of vaccum,
I don't want to use a remote canister.

I'm looking to buy a used hydrobooster rather than an expensive aftermarket one, do the newer Corvettes run this system ? Or what can I use in it's place that'll accept the Corvette master cylinder ? I can make up my own stainless lines and used the stock equalizer block.

hydroboost without master


hydroboost in a C3

Darrell I mounted a remote Vacuum pump on the roadster, I would take a photo of it but there is a firewall behind the seat and a real problem to get to at.

Just check it out on the Comp Cams site www.compcams.com the unit I am using is a 5500 Electric Vacuum Pump Kit. Mate if I can fit it anyone can, just make sure when you tighten the bolts through the rubber you don't over tighten them because they brake real easy, I drilled the bolts out and fitted a bolt right through the rubber. Just type in vacuum pump in the search section and it will take you right to the correct section then click on 5500 pump I think it says.

All the best with it, John

I had an 86 chevy caprice wagon that had a Hydro-boost brake system on it with a small block motor-The car had a heavy duty package with dual batteries,etc-maybe that was GM's idea of a heavy duty brake system too!

I don't know how many of those cars used them-but that is a lead for the bone yard or NAPA

Jim

Darrell,if memory serves me correct GM MCs are the same mount pattern.As for the hydro boost,it's a good set up There was a slew of GM trucks produced with it,I'd be scouring the wreckimg yards and you just might score!

bullet i use one on the blown beaumont , cost around 500.00 and works way better than a vacume booster

Thanks John for the suggestion, but I think I'll go with the hydrobooster. Seems I can find a used one for relatively cheap and use my Corvette Master and stainless lines and fittings I have laying around.

Frank ( techhead ) sent me this list of vehicles with hydroboosters.

CADILLAC ESCALADE (1999 - 2000)
CHEVROLET C1500 PICKUP (1995 - 1999)
CHEVROLET C1500 SUBURBAN (1995 - 1999)
CHEVROLET C2500 PICKUP (1995 - 2000)
CHEVROLET C2500 SUBURBAN (1995 - 1999)
CHEVROLET C3500 PICKUP (1995 - 2000)
CHEVROLET K1500 PICKUP (1995 - 1999)
CHEVROLET K1500 SUBURBAN (1995 - 1999)
CHEVROLET K2500 PICKUP (1995 - 2000)
CHEVROLET K2500 SUBURBAN (1995 - 1999)
CHEVROLET K3500 PICKUP (1995 - 2000)
CHEVROLET TAHOE (1995 - 2000)
GMC C1500 PICKUP (1998 - 1999)
GMC C1500 PICKUP SIERRA (1995 - 1997)
GMC C1500 PICKUP SIERRA XC (1995 - 1997)
GMC C1500 SUBURBAN (1995 - 1999)
GMC C2500 PICKUP (1999 - 2000)
GMC C2500 PICKUP SIERRA (1995 - 1998)
GMC C2500 PICKUP SIERRA XC (1995 - 1998)
GMC C2500 SUBURBAN (1995 - 1999)
GMC C3500 PICKUP (1998 - 2000)
GMC C3500 PICKUP SIERRA (1995 - 1997)
GMC C3500 PICKUP SIERRA XC (1995 - 1997)
GMC K1500 PICKUP 1999
GMC K1500 PICKUP SIERRA (1995 - 1998)
GMC K1500 PICKUP SIERRA XC (1995 - 1998)
GMC K1500 SUBURBAN (1995 - 1999)
GMC K2500 PICKUP (1998 - 2000)
GMC K2500 PICKUP SIERRA (1995 - 1997)
GMC K2500 PICKUP SIERRA XC (1995 - 1997)
GMC K2500 SUBURBAN (1995 - 1999)
GMC K3500 PICKUP (1998 - 2000)
GMC K3500 PICKUP SIERRA (1995 - 1997)
GMC K3500 PICKUP SIERRA XC (1995 - 1997)
GMC YUKON (1995 - 1999)
GMC YUKON DENALI (1999 - 2000)
GMC YUKON SLE 1999
GMC YUKON SLT 1999

Asphalt Angel said:

I had an 86 chevy caprice wagon that had a Hydro-boost brake system on it with a small block motor-The car had a heavy duty package with dual batteries,etc-maybe that was GM's idea of a heavy duty brake system too!

I don't know how many of those cars used them-but that is a lead for the bone yard or NAPA

Jim

Click to expand...

Good chance that was originally a diesel caprice. All of the cars with the 5.7 olds diesel as well as all of the GM diesel pickups ran hydroboost.

Cody said:

Good chance that was originally a diesel caprice. All of the cars with the 5.7 olds diesel as well as all of the GM diesel pickups ran hydroboost.

Click to expand...

Not likely-I was the second owner-The first owner was our local fire dept-The Chief's car-I wonder if any cop cars/taxis had similar equipment.But the diesel cars would be another place to find that system

Jim

BulletThe pix you have with the hydraboost in a C3 .I'm curious that it is using a master cylinder that is a disc drum type.The C3 is disc /disc. Also If I remember you are using a pump that is putting out around 1000 psi .I just wonder if it is enough pressure .

Bob

34ford said:

BulletThe pix you have with the hydraboost in a C3 .I'm curious that it is using a master cylinder that is a disc drum type.The C3 is disc /disc. Also If I remember you are using a pump that is putting out around 1000 psi .I just wonder if it is enough pressure .

Bob

Click to expand...

I don't know, I'll have to check that out.

I'm using a Billet Specialties Tru-Trac System that utilizes a Maval Mfg. steering pump. 3.5gpm @ 1200psi

Not sure what a Saginaw puts out.

bulletThat should be enough

Bob

Mustang Rack Fluid Pressure

Bullet,

You may considered this but are you aware of the pressure range your aftermarket TCI Mustang rack operates at. I ran into a problem where my GM pump was putting out 1200PSI and my MII rack operated at 700-800Psi. It made the steering VERY jumpy and erratic......unsafe at any speed! I've heard if you use a Hydroboost system you need to run a pressure reducing valve to lower the pump output to the rack.

bullet , as i was sitting on the throne of reading i found that summit sells the complete hydroboost system with fittings and hoses for a little over 500 clams