How Brake Boosters Work on Turbo Cars

Written by geoffrey st. marie
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How Brake Boosters Work on Turbo Cars
Vacuum power helps multiply the force placed on the brake pedal. (Ryan McVay/Photodisc/Getty Images)

If you have ever wondered how the force you exert on a brake pedal makes a vehicle weighing thousands of pounds actually stop, this is the role of a brake or vacuum booster in a turbocharged auto---or any other automobile that has one .


The principle design, function and operations of a brake booster are no different in a turbocharged vehicle than they are when applied o a standard engine model. The only event in which different mechanisms, devices or criteria may be involved is with regard to a diesel engine. An alternate pump may be necessary in that case.


As opposed to standard brake systems, power brakes use discs that need supplemental power in order to function. A brake booster is a dual-chambered device with a central diaphragm. When the brake pedal is engaged, one chamber fills with air and in the other, vacuum power is extracted from the engine. This pressure on the diaphragm activates the master cylinder through a pushrod, thus creating the extra power for the braking system.


In some cases, an individual may try to manipulate the brake booster function to enhance the effects or power delivered by the turbo charger. This is not advised, and anyone altering the production design of a booster does so at his own risk.

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