hmm go with the 2.2 Liter KB, and a stock motor, also who needs a tune? and try like 22 PSI of boost, just sell it fast or before it blows up. Good luck, sounds like you have alot more boost experience than i do. Expecially since i have zero haha.
Yeah.. I've got a pretty good bit of experience with tuning FI cars.. Hell, if I can make 700+ chp with 129 cubic inches.. I aint scared of a 4.6 with a little boost..
Here's my S13 240sx..
28psi and a 80 shot direct port. You can see where I sprayed it at around 4200rpm. Gotta love nitrous and turbos..
Yeah.. It scared me every time I hit the button.. I ended up parting the car out.. I couldn't keep a rear diff in the car.. The last straw was when I blew up a pinion racing a Busa from a 80mph roll...