wastegate vs bov

speedy_05

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Senior Member

speedy_05

Known Member
Senior Member
Jan 7, 2005
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hi..
i a newbie in turbo convertion...
want to know what the different between
****wastegate and blow off valve***

tq...
 

TitanRev

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Helmet Clan
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TitanRev

You think I print money?
Helmet Clan
Moderator
Mar 3, 2005
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The reason most turbo cars have a BOV is that when the throttle closes and the intake system is under pressure, the high-pressure air entering the motor will bump into the closed throttle plate, and (in the absence of a BOV) a pressure wave will travel back to the turbocharger.The result is that the compressor wheel will stall (a phenomenon known as “compressor surge”) and slow down very quickly.This is hard on the bearings and decreases the turbo’s lifespan, but it also means the turbo will take longer to spin up the next time the throttle is opened.

With the BOV in place, the pressurized air in front of the throttle body is released, and the turbo can freewheel happily.When the throttle opens again, the turbo will have a head start and will get up to speed faster, since it never stopped spinning in the first place.

A wastegate is a valve that diverts exhaust gases away from the turbine wheel in a turbocharger. Diversion of exhaust gases causes the turbine to lose speed, which in turn reduces the rotating speed of the compressor. The primary function of the wastegate is to stabilize boost pressure in turbocharger systems.