What can cause suspected compressor stall?

[Lavis89]

I'm getting a bit of a flutter when i lift off, it used to sound more like a whip cracking when i lifted off the loud peddle.

Only thing i can think of at the moment could possibly be a sticky recirc valve (Forge 008 with the revised piston). going to pop the top off when i can get some high temp grease to re-grease the seals, I serviced it around 6 - 8 months ago.

Anyone else got any ideas? No EML light/codes etc

 

[Lavis89]

Bit more info on this, it seems to be mostly when in a high gear at low speed, going to have to get hold of some heat proof grease and lube up the valve to see if that helps

 

[superkarl]

Stall is due to not dumping enough boost to relieve the pressure in the system.

it can be mistaken for simply the dump valve fluttering when lifting off, possibly due to fluctuation in vacuum when the throttle is closed, as the engine is obv still running with valves opening and closing.

i wouldn't worry about the latter