The base Tweecer is next to worthless IMHO simply because you give up the most valuable asset the Tweecer has to offer ...... Data Logging.
Even the more so with what kind of plans you tell us about.
Several forced combos like you talk about on the Tweecer site. They seem to be able to tune for good drivability if you ask me.
I think you could make it happen but check for yourself.
http://eectuning.org/forums/viewforum.php?f=2
Grady