Quote:
Originally Posted by WNDSRFR
What do the boosted guys do for vacuum?
If you have a positive manifold pressure you won't have any vacuum for the brake booster.
I know my GTI has a vacuum generator to boost the brakes to counter act the turbo.
What gives?
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The brake booster effectively stores vacuum since there is a one way check valve inline.
As long as the booster and check valve aren't leaking then you will regenerate booster vac on decel. It is possible to get into a case where you get on and off the brakes without lifting throttle under boost and that ends in a hard pedal, but it is a series of steps that doesn't normally happen, especially in a RWD car. I experienced it in a turbo Miata and it was an interesting discovery.