Do all turbo-charged vehicles have a BOV?

[SleepingEclipse]

As the title states, do all turbo charged cars have a BOV? I know its kind of a newbie question, but someone was telling me that not all turbo's have bov(I'm talking cars, semi's, pickup trucks, etc, ANY turbo motor)...I thought they all had them, but some where just more 'pronounced' aka louder than others. Thanks guys.

 

[czech09]

Stop right there. No diesels ever had a BOV. EVER. Say it with me. EVER. Deisel's don't have throttles, so they have no need for BOV's. A BOV releases the pressurized air during shifts, so that it doesn't flow backwards and damage the compressor wheel. Deisel's don't have this problem, because when you let off the throttle when you shift them, all you do is cut back on fuel. That's it.

When you're hearing trucks and buses "blow off," that isn't the BOV. That's the air brakes. Sorry to tell you, but that's how it is.

Now, there ARE some cars that came turbocharged from the factory without BOV's. These would include GN's, and some foreign versions of Rx7's. (they did make factory turbo versions before the FD).

Also, back when F1 used turbo's, there were very few cars that used BOV's. Hell, there were entire race series-es that didn't use BOV's. Rally, open wheel, you name it. Some people will contend that BOV's aren't neccesary at all. Name one occasion on which a F1 car failed due to excessive compressor surge. And they were running HIGH boost levels.

It's all up to what you want to do, and how much of an inner ricer you have.

What he said ^ . 100% agreement.

 

[Kuroko Rei]

I drive semis for a living and i can tell you that my Freightliner i drive doesnt have a bov no truck in the yard has a bov. if it happend during accelration it may of been the air dryer at the bottem of the tank

when you get below 100-90psi the air compressor will engauge and chage the air tank fo 120psi when it gets to 120 the bypass valve on the compressor will engauge spraying the water vapor and that sort out of the tank making a psssst sound

the jake brake does a varity of things including shutting off cilinders, stopping compression, also altering valve timing. those make a very loud sound sometimes it sounds like a put put put other times its a continus roar