[john]

It should not leak then as the hole sees no boost until the boost controller is opened. You could have your boost controler out too where the boost controller is doing nothing at all. Meaning it would leak at a normal rate. If you have the mbc set to 10 psi, it shouldn't leak. Do you get what I am trying to say? You are probly letting the wastegate actuator set the boost instead of the mbc.