Pretty much.

 

most bov's work in both directions. I remember on my VW you could run the bov in either direction without issue. However...i don't think it will really work.

 

Why wouldn't it work? When on the throttle, the boost pressure will hold it closed instead of push it open, and when off the throttle the intake manifold vacuum will open the valve like normal. Seems pretty straight forward to me

 

.. I thought I was the only cheapo that do this sort of things

It works very well .. just beware of overboost

 

Can the hks be recirculated?

 

Yes...if you have the Evo X hks kit already, dish out another 55 bucks to recur it.

 

Logic ftw! I will try it right now and report back LOL

 

my only question about the whole thing is that if you do this and your car has 20lbs of vacuum
and you have your boost set at 24 lbs then when you let off of the gas and the vacuum takes over wouldn't the BOV still be pressurized with 4 lbs of boost thus not opening the plunger? I am not saying that it would not work, I am just trying to figure the science of it out to make sure it is not hurting anything.

 

The -ve pressure from the intake manifold will always pull the BOV open at high rpms high power.. regardless of how many psi you're boosting .. this -ve pressure is strong enough to overcome both the boost AND the BOV valvespring pressure ..

The BOV may have issues opening at light throttle low rpms .. that is your worry .. most people worry that this causes undue pressure buildup on the intake tract bouncing the pressure back to the compressor .. guess what .. when you go aftermarket BOV .. its the same deal ..

 

did you try it out? did it work??

 

What do I need to recirculate it? I don't have the bov currently.

 

How bad is the compressor surge at low rpms from doing this?

 

I still don't understand how the hell turning it backwards would make it work... Isn't the intent of the stock BOV to minimize surge? By turning it backwards and boosting then shutting the throttle, the air charge has NO WHERE to go other then back out through the compressor. Sure, when you're under vacuum the BOV may open, but then you have a vacuum leak. Or is there something I'm missing here?

 

^ The stock BOV still works exactly the same as it did before, but now when the throttle is open, the boost pressure holds the valve closed instead of pushing it open. It will still vent the boost pressure when the throttle closes. The manifold vacuum doesn't hold the valve open all the time, only after you let off the throttle, and then the BOV's spring pushes and holds the valve closed. There are no vacuum leaks created anywhere.



It's the same way the HKS SSQV is setup

 

This does NOT work ... I've tried it personally was having problems with this. I was told from Bryan@GST that it induces compressor surge as the bov will not open correctly.