Originally Posted by JimmyBoy
It's the sound of the compressor blade stalling, in other words, what you hear is the sound of the turbo being forced to stop instead of being allowed to carry on spinning, put's unnecessary stress on the turbo.
So you'd recommend running a dump valve is safer for an S2? and will PREVENT problems lol?
Puts minimal extra strain on the turbo agreed but keeps pressure in the system. Running a DV upsets K-Jet and as said effectively gives you an airleak.