Reebs
meester super sleuth
EDIT: Oops, I thought his last post was his first post. I didn't read any of the stuff previously.
What wastegate spring do you have? What MBC do you have? I know that with mine all the way turned down, I run 9psi just having it installed. Without it installed, I run off my wastegate at 7.25psi or 1/2 Bar range. That is because I have the 1/2 Bar wastegate spring. If you have the same spring as I do, you have a boost leak. However, you might have around a 5psi wastegate spring so you just dropped completely to running off the wastegate with the MBC removed. That would make sense with your boost creep from trying to gain 5 to 6psi off a 4 or 5 pound spring. You may very well have a boost leak though. Get some PVC pipe and google a "how to" for making a gadget to test for boost leaks by pressurizing your system with a compressor air hose and listening for the leak. My homemade device works wonders.
What wastegate spring do you have? What MBC do you have? I know that with mine all the way turned down, I run 9psi just having it installed. Without it installed, I run off my wastegate at 7.25psi or 1/2 Bar range. That is because I have the 1/2 Bar wastegate spring. If you have the same spring as I do, you have a boost leak. However, you might have around a 5psi wastegate spring so you just dropped completely to running off the wastegate with the MBC removed. That would make sense with your boost creep from trying to gain 5 to 6psi off a 4 or 5 pound spring. You may very well have a boost leak though. Get some PVC pipe and google a "how to" for making a gadget to test for boost leaks by pressurizing your system with a compressor air hose and listening for the leak. My homemade device works wonders.
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