How much oscillation while on full boost would be considered normal? Using a hallman MBC with the stiff spring on my TD05. I was doing data logging and noticed it fluctuates ~2 PSI. Can't say I really notice it on my autometer boost gauge (but possibly because I'm paying attention to the road instead). I assume this fluctuation is from the MBC spring bouncing on the wastegate?
Thoughts? Would using the stock boost solenoid help to lessen it?