exactly...I installed it like the OEM valve! the piston is towards the turbo..so it pressures it with air..and gets it open... common sense (if you put it in reverse..it wouldn't work .....)

but I dont get any sound from it

 

I don't think you fully understand how the DV works.

When you are on the throttle building boost, the whole intake system is pressurized. When you get off the gas and close the throttle plates that pressurized air has to go somewhere. Without a DV that pressurized air pushes back against the still spinning turbo, causing compressor surge (a chattering or shuddering sound.) Long term this will lead to damage of the compressor and is less efficient to maintain boost levels after shifting.

The DV is a valve that should ONLY open when the throttle plates are closed and you are off the gas. The DV opening and closing is solely dependent on whether the engine is seeing vacuum or boost. When the engine is seeing boost the DV's piston is being held closed by the pressurized air, as soon as the throttle plates close and the engine sees vacuum it sucks the DV open allowing the pressurized air a route away from the compressor and back into the intake.

No matter which direction the (piston style) valve is installed, it will function.

Are you chipped or stock?

 

Stock atm.... so if I install the DV in reverse....the suction would suck the piston back... and let the pressure come out...... right?

and the right way would be the pressure to push the piston back...and let it out...

now I get it I guess....


so I should install it on the way that the piston will get sucked...right?

(thank you so much for all the time you spend on that threat....)

 

I don't mind explaining it, no worries. However...you are still missing the general point.

You have to separate the idea of the piston opening from the orientation of the DV. The piston in the DV will ALWAYS open when vacuum is applied, and will ALWAYS be closed when the engine is under boost. The orientation does not affect the basic function of the piston.

I feel like I should make a drawing to illustrate what I am trying to explain. Or maybe I am just failing at explaining it clearly.

But...imagine there is no DV, imagine that from the compressor outlet it goes straight to the TB. Now install a short hose going from the boosted side of the compressor outlet to the vacuum side at the compressor inlet. On that hose is where the DV sits and allows the air to be recirculated.

When you install a piston style DV, the proper orientation is to have the bowl of piston (if you take the 007 out and look at it, what I am describing will make more sense) on the boosted side of that little hose. When the valve is opened it will allow the air to move into the vacuum side of the compressor inlet.

Even if you install the DV in reverse, it will still function. Function is not dependent on orientation with a piston style DV.

 

actually I have the stock DV in front of me...and I remember that I installed my DV the same way as my stock was..... is that the right way..or not? (trying to keep it simple..)

 

That would be reversed. So if it is already reversed and you don't hear anything, you would hear less if you installed it in the proper orientation.

 

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lets connect the dots


gz for my drawing!

 

You don't do technical drawings for a living or anything do you? lol

 

no! I am a captain on merchant ships

 

That's awesome!

Maybe this diagram will help clear things up. The DV is numbered 19. If you follow the dotted line from the side of the diverter valve into the little port on the hose numbered 17, that's the pressurized air coming out of the turbo (not pictured, but it would be where the arrow labeled 15 is). The piston that Drifter was referring to would be oriented vertically in this picture inside the diverter valve. Reversing it would make that piston face the pressurized air instead of the way it's facing now. Make sense?