how much boost are you measuring?

my slk32 throws a code near the transition of 20 to 21 psi (this is going off of boost data that makes it through the OBD2 port, so it may be slow). but it throws a "P0108"


so you suspect the car is reacting to the rotrex's non-linear boost?
others have moved on form belt driven turbos for far simpler reasons. You methodical approach to solving each issue as it arises is quite impressive. Looking forward to seeing whatever you come up with next.

Keep up the cool work and happy holidays


Chris