I ran a MBC on the porsche for years and it worked just fine. It was also a knob adjustable regulator plumbed into the cockpit so I could change my boost while on the move.

I am replacing it with an HKS EVC IV when I put the car back together since I would prefer to hit a button for a one minute scramble instead of reaching under the dash to count off wheel turns on the regulator when I want to bump the boost.

If anyone wants to buy my cockpit adjustable MBC its for sale. All I have to do is remove it from the 930.