regardless of my source i posted where i found my foundation to make my statement, if it is wrong then i would rather you point m in the right direction then try n mock me for my statement i would rather read that i am wrong then hear say...IJS!!!

 

people people, who cares about Surge/BOV viability.

Everyone knows its for sound on this car, we get it. Thanks.

Lets not gum up this thread about it.

 

me and dakota both have the same setup.

Charge pipe with turbo xs bov flange. with a turbo xs rfl bov

 

I apologize. I didn't intend to mock you directly, I was more so making fun of Wikipedia. There is some great stuff there but people forget that the info is contributed by anybody who can type and not everything is always accurate.

Now, I am not an engineer or a physicist and I won't pretend to be but from my understanding, true compressor surge happens when a turbo is out flowing the motor at a given rpm and load. It would be like if you were trying to chug a drink. You can't swallow the whole glass at once so every gulp, the liquid flows back into the glass and back into your mouth again after each swallow. You would only notice surge during acceleration or under boost, not after you let off the throttle. The fix is to increase the flow capabilities of the motor, turn down the boost or get a better fitting turbo for the motor. I'm sure there is a MUCH better techincal description but you wont get it from me.

Here is a great example of compressor surge...



The BOV not opening properly does cause that pressure to be forced back over the blades. As you eluded to, thats a bad thing. From my understanding, that is NOT true compressor surge but it is referred to as compressor surge by many. So you weren't exactly wrong and so I stand corrected. I think there is a lot of confusing info out there about it. I considered surge only able to happen while the turbo is actively making boost, not necessarily spinning back down after acceleration. Oy Vey...

 

one other thing people do with the big turbos is add an anti surge cover into the compressor housing...... it basically allows air to recirculate inside the cover.

 

MAn thanx for clearing that up for me. i didnt kno that honestly bout wiki...and i now have a better understanding of surge, so my question is with the bov going recir... does it keep the turbo spooled thru shift(not NLS)?

LMAO liquid flows back in ur mouth after each swallow.....totally took that out of context..

 

As far as my understanding of the turbo system, recirc'd air from the BOV wouldn't necessarily keep a turbo spooled bc the spool is more so controlled by the exhaust side. What it does do is keep the volume inside the pressure side of the system up so that the turbo doesn't have to replace all that air that would have otherwise blown out into the atmosphere (i.e. better response). If anyone reading this wants to correct me if I'm wrong, please jump in but that's how I understand it.

Also, from the tuning aspect, it's better as the MAF is kept in stock location. Most BOVs are plenty loud enough that you'll still be able to enjoy the sound even when recirc'd.

I figured you'd get a kick from the swallow example.