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Ok, so have been trolling the internet reading info on turbos and boost controllers and wanting a bit of help determining whether I need one and if so whats good. So the car is 91 RS legacy with TD05 and V4 wrx Z4 ecu. No mods except for exhaust. 1. without mods do I need a boost controller - I have read that a manual boost controller is better than the stock one as it allows to wastegate to remain fully closed to full boost is achieved as what Ive read the factory solenoid will start open a little before full boost. 2. Is a MBC safe to use? how easy to set up? I have a boost gauge so I can see whats happening. 3. Is there a risk of boost spikes? 4. Does a boost controller need a tune to work properly? Im not wanting to up the boost at this point, but most things Ive read say ditch the factory solenoid. Im totally new to the world of turbos and wanting to increase my knowledge before I buy anything or do anything to ruin the car. It does seem there are varying opinions about MBCs and EBCs. Any/as much info on whats required, if I should get one, am I an idiot for suggesting it, any comments please. Thanks
