I was expecting more than that with the larger turbos! MPT claims 92 HP gains with the 93 PRX tune and that is without larger turbos, TAs and down pipes.
Without knowing the details, that would be more than 100 hp at the wheels, than the mpt tune, thats a lot, most of the upgraded parts are supporting parts, also i will imagine it will have a very safe tune and be very repetable...(wont heatsoak, as easily)
By using a little bit bigger turbos, he wont loose spool or much of it, will gain top end, and will also be pushing the turbos in their efficiency range, which will limit detonations, via cooler iat...
P.d. this also tells me that intakes, spd adapters and down pipes, dont do much...also i dont think these engine have much more than that....ford gt have i think 525 at the wheels...
If it was me i would just do turbos, intercooler, catch can, and tune...as a good efficient start...
---------- Post added at 06:19 PM ---------- Previous post was at 06:16 PM ----------
Just a heads up, Switzer Performance put larger turbos on their Raptor and blew the block. They say max you can do to these is a tune and anything more you'll have to build the block. Good Luck...
I was told the same thing by my gtr tuner, that the engine doesnt have much more than what the op is quoting... i was told about 550 ...