Quote:
Originally Posted by fliprayzin240sx
I'd probably even suggest some SARD 850. I've seen 740s max out around 450-460 range. Better to have a bit more just in case.
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^^^ I Agree with Him!
Personally I'd Recommend
JWT Fuel Rail
ID1000cc injectors
Tomei FPR
DocRace Twin Scroll T3 Manifold
GTX3071R with .82 A/R divided Housing.
Full 3" Exhausts.
Turbosmart Comp40 Wastegate.
as far as turbo goes, partly why it's so laggy its because of the really big camshafts that you have. I would change your camshafts out for some JWT Camshafts that'll give you better mid range HP and more TQ down low. the GTX3071R will be a good turbo for 450+hp. I recently Tuned a completely stock block and head RB25 using California 91 octane fuel and made 422whp at 17psi peak (around 4K rpm) and boost fell off to 14psi by 7700 RPM. made peak hp at 7300RPM. so with only 0.1L difference in size and a more efficient cylinder head that you have on your car you should have no problem hitting your 450whp goal with a GTX3071R all parts which we can supply for you
-Juan