Z-06&syclonefan
New member
Is this the same thing that lets pressure out or the crankcase because compression causes air to slip by the piston and compress the other way? and does it make a difference
Blow off Valve
- Thread starter Z-06&syclonefan
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Ian Turgeon
Cascading Inspiration
a good subject to use the search function for.
Ill try to make it easy to understand. The turbo pushes air into the engine through the throttle body. At wot the throttle body is open and air is rushing through....when you get off the gas the throttle body closes and slams the door on the air.....causing a backwards pulse of air headed for the turbo. This pulse can damange the turbo over time. The purpose of the BOV is to vent that pulse into the atomsphere before it ever makes it to the turbo preventing damange to the turbo. And it makes a cool sound too.
InvisiBill
Active member
Also, they are used more with manual transmissions, since the throttle body is going from wide open to completely shut at every shift. And since the BOV is venting that extra boost instead of shoving it back through the intake, it's easier for the turbo to spin up again when you get back on the gas.