Waste Gate "Woosh" noise...

[CoreyPerez]

I noticed that a lot of the ricers have that neat-o sounding "whoosh" when the wastegate dumps. Do we have any options of that nature? I don't want to sound like a ricer, I just what that lit **** ant to know what just smoked him...



Thanks,



Corey

 

[Extreme1]

I don't think it would work on a diesel.



I think what they are doing is dumping overboost from the intake when the throttle valve closes.



On the Cummins, the excess intake pressure is relieved by bypassing the exhaust turbine through the turbo housing. By relieving the drive pressure, the turbo slows and the intake pressure drops.

 

[CoreyPerez]

I thought that was what the waste gate was for. I just thought they had some kind of contraption hooked up to the wastegate, or had a different type of waste gate hooked up.



Corey

 

[Extreme1]

I don't think so. Some route the wastegate pressure directly out to the atmosphere through a small silencer in place of the internal passage. That might also be the source of the noise.



Or, if it's a modded street car, it could be a "pop-off" valve that vents the intake charge directly to the atmosphere. Of course that wouldn't be good if it had fuel in it already.



Ours wastegate opens a route from the exhaust manifold to the pipe around the turbo housing. That's why you can't hear it.



You could cut up a housing and add the external dump if there is room.



Or, you could plug the wastegate and add a popoff valve.

 

[LarryB]

I think it's the pressurized air from th compressor turbine being dumped out a popoff or wastegate on the intake side when the butterfly is suddenly closed. The boost air must go somewhere. Since these are fuel injected engines there is no fuel mixed when it is dumped. A wastegate like ours wouldn't work correctly on a gaspot.



In a diesel there is no butterfly to close so the boost air continues to be pumped through the engine after the throttle is closed but no fuel is added. The wastegate on our engines is on the exhaust side and is used only to control boost when under power. By using an exhaust wastegate we get lower exhaust pressure when the gate is open under power



Sorry but I think that is a gaspot only sound.



Of course, I'm no expert! and could be full of bologna.