Definition
BOVs prevent compressor surge on many turbo setups.
Recirculating valves return air to the intake for mass-airflow sensor stability.
Automotive Wiki
Forced Induction
Blow-Off Valve
A valve that vents pressurized intake air when the throttle closes to protect the turbo.
Related terms
- TurbochargerAn exhaust-driven compressor that forces extra air into the engine to increase p…
- SuperchargerA belt-driven compressor providing immediate boost without waiting for exhaust e…
- IntercoolerA heat exchanger that cools compressed intake air before it enters the engine.
- WastegateA valve regulating exhaust flow to the turbo turbine to control boost pressure.
- Boost PressureManifold pressure above atmospheric, usually measured in psi or bar.
- Twin TurboA setup using two turbochargers, either in parallel or sequential configuration.
Category: Forced Induction · Updated August 31, 2026