Originally Posted by
Karlos G
The turbo does not stall!! If that happened you'd have no exhaust gasses flowing out and the engine would stall!
No.
The vacuum from the inlet stroke pulls air into the inlet manifold keeping the engine running.
Also, you need something pretty hefty to stall an engine due to flywheel inertia.
And the phenomenon known as 'chatter' is correctly referred to as compressor or turbine stall, because the compressor wheel is forced to stall due to the turbulent air in front of the throttle plate going back the way it came because it has nowhere else to go.
Originally Posted by
Karlos G
Also you have to remember that when you dump your loosing all the charge air/pressure from your intake which the turbo then has to repressurise again...
Correct
Originally Posted by
Karlos G
adding lag
No.
The very nature of a turbocharger dictates that lag will always be present without something to combat it.
By stalling the compressor wheel, the turbine wheel is also stalled - it doesn't stop completely, it reverses direction many times (which causes the chattering sound) due to turbulence on the compressor side and exhaust gas flow on the turbine side, until it can continue spinning in the right direction again.
By stalling the turbine, you're effectively making more work for yourself - if the compressed air can escape, the turbine won't stall, and therefore continues spinning in the right direction.
Originally Posted by
Karlos G
Hence the ongoing debate...
Debate is healthy