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Discussion Starter · #1 ·
A BOV is installed on the intake side and is a valve that opens after a certain pressure. After 10PSI, for instance, the BOV will allow all the extra pressure to just get released, allowing only 10PSI of pressure into the engine. That's how you regulate the pressure.

A BOV also helps to keep you from having too much air going into the engine when you change RPMS very quickly. For instance, between gears, your RPMS might go from 6000 to 2000 very quickly, while the turbocharger or Supercharger is still spinning, that's where you get the PSSSHHHH... It releases all the pressure and allow it to build up naturally without throwing the Air/fuel ratio out of whack.

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