Does a MBC make noise? Ive boughten two diferent turbosmart ones. Have it mounted in the cabin, and can hear and feel them both whistle on the valve body. Recently just got a different turbo swap(super70tofwd 50 trim) and have troubles building boost. Initially thought it was the MBC so I bought a new one. Drove it for a few miles and didn't seem to make a sound, increase boost response some but not a lot. Mounted the new one properly the next day instead of hanging there, and it began to make the noise and bleed out air in the body. Do I have faulty products? I rechecked the vac lines seem good. Any insight would be aprreciated thanks. I'm not a pro mechanic , most my work gets done by others.