Nobody knows... as nobody has pushed a built motor... to its limits...
yet...
Today with the help of HydraEMS and many other new modifications that have been developed... we have way more possibilities.
I am hoping to reach something respectable with my project... but who knows it is as likely to be disappointing as it is successful... at the end of the day you are wasting a significant amount money into a car thats not easy to modify or do anything with.... during a tough economic time...
not mentioning time and many other factors.
Planning what you want... how you want it and how you are going to get there... is key for any such project.
-Sov13t.