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Crap, I should've just left my reply then... :P
It all depends on what exactly is causing the boost drop?
If it's due to too small of a turbo, then the actuator isn't going to help.
IIRC, a "modified" WG actuator only changes the boost curve by changing the spring pretension to the wastegate actuator.
HKS used to sell these things, but with the advent of boost control technology, there was no sense offering them anymore.
(Electronic) boost controllers have gotten so good, that messing around with modified actuators is a waste of time.
If the wastegate is the culprit, then this can be confirmed by datalogging your boost levels.
Does the boost levels fluctuate at the top end?
If so, then a stronger spring might help.
Most of us do run EBC's, so it's easy to just adjust the EBC to see if this helps.
If the turbo is just too small, nothing you will do will help.
The actuator isn't going to help.
The EBC isn't going to help either.
There is a quick and dirty way to test this, but I warn you it's dangerous...
Disconnect the vaccum line to the WG actuator and see if this changes your boost levels.
If your boost still drops, you're just going way past the physical limits of the turbo itself.
Obvious dangers of overboosting apply here, so be very careful about how much you mash the gas pedal when trying this.
-Ted
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