Originally Posted by CTSparky
I admit to not being very experienced in this application. In fairness I'm just trying to help.
So what would a 102 trap speed equate to?
He could be bogging from letting up too fast or too low a rpm, or not letting go on the upswing of the tach (building boost). There are many reasons. Even the OP says he was soft on the launch.
With a forged block what boost pressure is the engine capable to?
If on a stock turbo a 2005 is a vf39 which can get up to about 300whp when everything is addressed. That is if the OP has a stock turbo.
and on this turbo about 20lbs is at the end of it's efficiency.
102 trap speed is around stock / stage 1 and is 13 seconds. Bogging the car is not from rpm at all. Even if you launch the car at 3k rpms you don't bog because the rpms are too low. You bog the car because you are letting the clutch out too fast.