Excellent, thank you for the help.

Does this mean that the overboost is just for protection and is not used the vast majority of the time?

Also, how does the turbo send the signal to the IP, is that vacuum, electric, or other?

And... is the wastegate setpoint determined by a spring?

__________________
1987 300SDL 167k
1992 Volvo 740 140k
1990 Volvo 740 250k
1989 Volvo 240 269k

Anyone want to trade an old Volvo for an '87 300sdl?