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newer VWs use electric vacuum pumps
newer VW s
use electric vacuum pumps , to have vacuum for the power brake available even when the turbo is producing boost when intake manifold vacuum is actually not vacuum but pressure above Barometric pressure...
anyway
it would not be difficult to use one of those pumps along with a pressure switch or two and a Vacuum storage cylinder (plastic drain pipe) so that you could keep you power brakes functional
the pump would only run to pull vacuum when vacuum was needed , most of the time , everything would be at rest , using zero energy .
the current VW system operates on the VW network and is controlled by modules in the network , that part of the current system could NOT be used ,
but the pump is just a pump with a relay and a vacuum switch , could turn on when vacuum falls below a certain value and turn off when a certain value is achieved without much drama or engineering involved
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