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Discussion Starter #1
I've been driving with some Supra guys, and noted the external BOV. First of all, love the "Pop" and hiss these things make, and would love to put one on my car.

Question is, what is the advantage of this part? Does it lower EGT? Does it do a better job than a BOV that goes through the exhaust?

TIA for any info

A.J.
 

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you got some things mixed up. u can either have the bov vent into the atmosphere, or back into the intake. when you hear the pshhh its venting into the air. the purpose of a bov is to protect the turbo against air coming back at it when the throttle plate closes (compressor surge) the external thing you are talking about with venting into the exhaust is the wastegate.
 
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