Trans Am Information > Suspension

Low Vacuum, Poor Brakes

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Tin Indians Rule:

--- Quote from: "81BlackTA" ---Another idea for you to consider...GM makes or made a hydraulic power brake assist as well. I had a crew cab 3500 series truck that had that system. It worked great and ran off of the power steering pump. Vacuum doesnt matter with that set up. There is no vacuum booster behind your master cylinder.

Heres one link:  http://www.hydratechbraking.com/

Heres another one:     http://www.superchevy.com/technical/chassis/brakes/0601sc_hydro/
--- End quote ---

those are great units too. I think they were called hydroboost and they were on all the GM cars that had diesels in the early 80's. I robbed a whole set up from a regal at the boneyard for 25 bucks a few years ago.

Eagle 1:
The problem with those is they really rob horsepower from the engine.

A buddy of mine used a vacuum pump on his pickup and he said it really helped especially in the braking.

81BlackTA:
The problem with those is they really rob horsepower from the engine.


I believe they use the power steering pump which is spinning anyway. Other than a bit of extra fluid circulating, there is no load on the pump unless the brakes are applied, which case you are slowing down and don't need the horsepower then. I believe one of the links in my previous post addresses that issue.

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