Well on Dori's car which is a head fck as it has some weird issue's.
It was laggier, and less top end. Wanted to ping at 240kw where as last time it was making 280kw on the edge. Lost 30 kw at 100kph also. Had the exact same surge issue as the non anti surge housing which we think is the profec playing silly buggers with us.
It wasnt until we went for a run on the road that i noticed it hitting the boost warning. Weird thing is the boost warning is set at 26psi and profec isoinly reading 20. So i turned warning up to 33psi and it didnt surge once on the road after that.
We couldnt find a bleed valve lying around as i lent my last one out to another customer during the week.
Only things changed since last tune where anti surge housing and the exhaust leak was fixed (other end of the plumb back pipe for external gate wasnt sealing) but is running screamer