I've had an MBC on my car for close to a year but recently installed 8:5:1 pistons and Crower rods after breaking a piston. Since it was fresh I wanted to really take it easy breaking it in, so I adjusted the bar/rod on the wastegate (HRC Stage II) to 2psi. I wanted to be able to almost cut boost when I have the MBC turned "off". Well now its broken in, but even when I open the MBC all the way up the boost stays at 2psi. The weird thing is, even though the boost never increased, the car was more responsive with the MBC opened. I'm going to re-adjust the bar on the wastegate to 5psi as soon as I can leave the car sit long enough to cool down. Im just baffled why the MBC did nothing.