TBH, I would say around 180-190hp, its difficult to say really, if its on a standard head and bottom end, I think you will need to keep ramping the boost up until either the turbo is on its limit, fuelling from the MFi is maxed out or the engine wont take any more boost efficiently....

I guess it depennds whos RR you use....im sure you could break 250hp if someone like Sabre Motorsports RR was used (as an example lol)

one thing to remember is MSD wont tune for numbers, they will tune so the car drives great and is reliable which can only be a good thing lol