[Archertsi]

A higher psi WG actuator means a stiffer spring. People install these to prevent lag. Stiffer spring keeps the flapper closed until the last minute, that first few pounds of boost doesnt let it open early causing a slower spool up since some exhaust can escape.

But my theory is that it also causes the WG to open too late so the boost spikes until finally the WG opens fully and lets enough exhaust out and the turbo slows down.

I think it's a trade off either way with an MBC. Softer spring in the actuator may give you better control of peak boost, stiffer increases spool up but you have to deal with the spike.

Maybe Kracka could explain a little more about what Perrin is trying to claim. It looks like they are trying to say. My theories could be totally wrong if they have something figured out and it's proven to work?