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Re: Can't hold boost, did a boost leak test, check inside.
Most Forge shit is expensive junk.
To hold more boost, tack weld the actuator arm with the flapper closed. Or if you have a bigger upgraded flapper, get a smaller one. The larger the flapper surface are the more likely it will be pushed open. Having the flow towards the flapper all nicely ported is going to make it worse too. All the shit you do to prevent creep with a 16G is not what you want, if you are trying to run high boost on one. If you can get a bigger exhaust wheel in there, or clip it, do that. If you can get a bigger exhaust housing, do that.
The compressor wheel, inlet size, etc can only flow so much air, regardless of boost level. Sometimes you get to a powerlevel and the turbo holds that power while the boost drops as the RPMs go up because the turbo is just maxed. This even happens with bigger turbos running external wastegates. You can have perfectly solid across the board boost control and then you get to some HP level where you can only get more boost in the lower/mid RPMs and the boost up top just falls back down to the same psi/HP.
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