A bypass valve is better when you are using a draw through MAF or AFM, VAFM, the car can stall when you let off of the gas if its draw through (due to letting air out of the intake that the ecu has already metered). With a blow through set up and the sensor after the BOV its ok. On my 2.3t merkur i didnt use a blow off valve because it was a draw through, the VAFM was before the turbo. I ran it for over a year with no bov and the turbo is fine. Some turbos can take that kind of abuse and others cant.

 

I'm not going to sit here and argue who knows more, or what system is better. 99% of the people here just repeat what is on the internet, and have no proof or knowledge of the differences or performance gains of anything. Or who knows how to install something.

We'll all be gold metal winners in the Olympics arguing about this.

 

And what I'm saying. Show me something that proves there is better performance, so me that it saves bearings, show me something.

Otherwise it's nothing more than armchair racing/engineering.

 

is this thread seriouse?

 

Saves bearings? They are made to release air once the TB closes. This prevents air in the system from coming back towards the turbo.

 

i say let him run it w/o a BOV then see him cry the next day when he blew his 10k investment... some ppl have to learn the hard way.

 

The burden of proof is on you, not your friend in Japan. You prove to us why a BOV is not necessary

 

 

Show me a car that blew up because of not having a BOV. BPV you can argue that it's the better option, but my car has been purring along for over a year, with none.

Cheaper turbos may not be able to take some compressor surge, but the turbos that come in the GReddy are pretty stout.

So my proof is that, I see nothing in the way of proof that not having one will "blow up" anything. The majority of problems come from a crappy install.

But we'll just follow the lead lemming.


And I'm not saying that there isn't some benefit to having one, but there isn't really in ill effect of not putting one on either.

 

you probly heard the waste gates.... lol cuz i know before i got BOV installed you could hear my waste gates clearly and they sounded like a BOV lol....

 

Diesel turbo engines do not use a bypass or bov valve and the turbos on them last well over 100k miles. At least it is this way on the Cummins engine. As for blowing up the turbo, its not going to happen. The bearings may go out sooner than normal and it will smoke when this happens. It wont blow up your engine. You will be able to hear the wastegate flutter with no bov.

 

Come on, the internet knows more than everybody...those turbo diesel engines are POS...kidding if you didn't know.

This stuff is like racing. If somebody wins with a video camera on an F1 car, they all want it. Somebody puts a BOV on their car and it's tuned right, we all need one.

What we need and want are two different things.

 

yep

 

You said it yourself...it will prevent compressor surge. Just cause the ones on your car haven't eaten themselves yet doesn't mean you don't need one.

 

Show me where somebodies have "eaten themselves" and then we can look at why type of turbo, or knock-off they are.

 

You know what the purpose of it is and now you want me to find where one was f'ed up cause they didn't use one? Everyone with a brain uses a BOV with their turbos. Why would I be able to find info on f'ed up ones?

 

Actually the ones with brains use BPV (recirc) but that doesn't seem to matter. And you are talking yourself in a circle. You can't find a problem caused by not having them, and even people point out that turbo diesel engines which run at much higher boost, don't use any.

 

wow you guys are rediculous..... I'm gonna go with Beer Goggles on this after working for Ford,Chevy and currently Dodge. None of which diesels use a BOV from the factory or need them Our Cummins motor makes 600ft lbs of torque and doesn't need it nor does our POS SRT-4 neon. wastegates work just fine. BOV sound like "WOOSH I'M COOL" to most kids but arent NECESSARY. Matter of fact I had some MORON with an Evo when I worked at Mitsubishi have a aftermarket BOV stick open and wanted us to warranty his turbo cause he couldn't get any boost....

go ahead and flame away. If your system is designed right and it didnt include a BOV don't you think that means something

 

lol i think your joking, but im not sure, cuz i dont know what kinda bov or wastegates you have, but my bov sound nothing like my wastegates

 

If the norm is to use them, why would I be able to find someone who had problems by not using one?