MBC Question

[HTA A4]

Alright so my friend had a Forge MBC laying around his shop and I put it on. I put the REVO on boost 9 and took it out. I'm only getting 15psi out of it when its all the way open.. What's the deal? Do I have it installed wrong or something?

[IronAudi]

do you have a boost gauge, can you pull more then 15lbs without it?

[HTA A4]

Yeah I do. And yeah, with the n75, I get like 20psi.. But that's on boost 8 which should be like 22-23.

[durfA4]

did you try to tighten it down/hold the valve closed longer will do. or double check all connections it sounds like there is no boost going to the wastegate actuator. but the wastegate should open around 10 psi.

if none of that works check your actuator rod for any play if there is then your n75 was able to adapt and keep your boost on where as the mbc is just a one way valve and is unable to compensate.

[mike-2ptzero]

Alright so my friend had a Forge MBC laying around his shop and I put it on. I put the REVO on boost 9 and took it out. I'm only getting 15psi out of it when its all the way open.. What's the deal? Do I have it installed wrong or something?

Is it leak type of valve?