Texas Mondrel, You do have the FRPP pulley and tune, right ?
Yup, i've got about 635hp, but even with the pulley, the Mac absolutely blows the doors off the GT - its unbelievably quick. However, as Mitch notes, there's that turbo-induced momentary hesitation if you aren't above 3000 rpm. There's some work that can be done to the 12c's engine (mostly re-mapping and exhaust) that can take the 616hp up to about 675, but a big whipple, GG cold-air etc should get the GT up to 835+, AND, I can do the work myself, so that's the road I'll be heading down as soon as my current project (my Mazda-poweed Morris MinorWoodie) is finished.
