I don't know too big? Ask JR Lewis 9.12 @149 MPH thats the record holder! He runs a 3.4 Whipple and that was with a 100 mm throttle body.
thats jr old numbers he's gone 8.72@155 now. whipple is coming out with a 3.9 and 4.5 set ups for the cobra and Shelby
There will be 2 versions One which will be able to run continuous 30psi and another which is capable of 50psi.