Slightly off topic, but when alot of Rb20 biys upgrade to an RB25 turbo and keep the RB25 actuator they have boost issues. Perhaps the Rb25 actuator becides being set to a lower boost pressure is somewhat reliant on that factory boost soleniod.....NFI why, could always try boreing out the bleed hole in the diafram???? Or just put a 20 actuator on there with the EBC and see how it goes.....just a suggestion