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If you mean specifically, what type of vacuum, the answer is manifold vacuum. Manifold vacuum is constant and doesn't, change with throttle valve opening, the way ported vacuum does.

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Q: What does a vacuum power brake booster use to assist the driver in applying pressure to the master cylinder pistons?
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Related questions

Primary master cylinder pistons are activated by?

Brake booster pushrod


How do the pistons in a car engine work?

Pistons converter the pressure of the burning air/fuel charge in the cylinder into torque through the connection to the crankshaft.


How many pistons in a 4 cylinder?

There would be 4 pistons, one in each cylinder.


How many pistons in a 8 cylinder engine?

A normal combustion engine has one piston per cylinder. So a 4 cylinder has 4 pistons, a 8 cylinder has 8 pistons, etc.


How many pistons does each wheel cylinder have?

A wheel cylinder describes "Drum Brakes" - Drum brakes have one cylinder with two diametrically opposed pistons.


What does 4 cylinder mean on car?

4 cylinder means that the engine has 4 pistons it means it has 4 pistons. the number of pistons can tell you how much speed and how much power


What danger exists by using air pressure to push out pistons from cylinder?

you should be able to just push the pistons up and out. never use air. obviously the pistons are seized in that case. sometime i use the woden handle of a handle to tap them out but be careful when doing this.


What is cylinder bore?

This is the diameter of the cylinder hole in the engine block for the pistons.


What is the function of cylinder block?

to house the pistons


How many pistons in a v8 engine?

An engine has one piston for each cylinder, so a V8 will have eight pistons.An engine has one piston for each cylinder, so a V8 will have eight pistons.


What pushes the pistons out of the brake cylinder?

Hydraulic Fluid


What is a 1 cylinder?

A 1 cylinder is an engine with a single cylinder and piston. As opposed to a twin which has 2 cylinders and 2 pistons or a V6 (6 cylinders, 6 pistons) etc. 1 cylinder engines are common on lawnmoers and small motorcycles or dirtbikes.