The way this turbo was explained to me was imagine the top end of a 37R with the spool up of a 16g. The vgt starts off closed creating a smaller surface area on the exhaust wheel. And slowly opens up creating a large surface area. So you have great bottom end without loosing anything on the top end. The reason why dodge is pulling these turbos off constantly is the deisel trucks create so much soot/carbon build up the vgt gets stuck. So warranty tells the mechanic to just replace the turbo. Well if they had half a brain they would pull it off and clean it. Instead of paying holset a 1k a pop. This turbo doesnt have a stickin issue at all fyi. Now when the first couple ppl started using this turbo another concern was the heat from a gas engine that this turbo wouldnt take it. Well so far no one has had any issues. There are a few threads over on dsmtuners about this turbo. The other vgt turbo i know of is made by garrett and is on the new superdutys but my understanding is the wheel doesnt close far enough to still have good low end. And i dont recall anyone being able to get a internal wastegate plunger to be able to control the vgt on it.
pics:
This is where the factory electronic control bolts on. But you can see in this picture the lever that controls the vgt.
You can see where the fins of the vgt slide into the housing
That is the vgt fully open
and thats fully closed
and the internal wastegate plunger you need an adjustable one.