I am building my gsr engine for turbo and can't decided what turbo set up i should go with. I so far have a Ramhorn exhaust mani, skunk2 intake mani, blox 69mm throttle body, skunk2 pro cam gears, skunk2 valve springs and retainers, polished crank, wiesco pistons 8:7.1 conpression, eagle rods, and arp studs. I will be using Hondata s200 for tuning, i am hoping to reach 450+ on horsepower. Anyone have any suggestions on what turbo and intercooler would be good to use?

 

a precision 600 horsepower intercooler core with custom piping will be a good option for the intercooler setup

for the turbo you have several options

do you plan on staying around the 450 horsepower mark with the engine or eventually want to make more power ?

some of the 61mm turbo's are good options to make 400-450 horsepower easily now but allow you to grow up to 600-650 horsepower down the road with the same turbo if you want

for instance here are some options to check out
Precision SC61
Garrett GT35r
Precision 6262 Billet

edit:
GT3076r
GT3071r

 

I think first before deciding on a 61mm or larger turbocharger, you need to ask yourself if this 450+whp is planned to be on pump gas (93 octane assumed) or if this is race gas related, as some of the smaller units have a bit better torqueband throughout honda's rev-range than just ultimate power. You also need to state a budget as what you're trying to spend, and if you understand the responsibilities of added waterlines, restrictors, and other amenities needed from a ball-bearing cartridge. Also, don't be afraid to look at the Borg-Warner options as well. You'd be surprised what an S258 can do over some of the larger compressor wheels listed above.

All I'm saying is that you need to think of budget, other hardware (manifold/downpipe etc) and use of the car before making a purchase. You may think 450+whp is what you want, but you might not need up to that quite yet.

 

i wouldn't mind going up over 450hp. I would love to be up near 600hp. i just don't want to really be below 450hp. I will for the most part be running pump gas, this is just a project car now and won't be daily driven anymore. As in the budget I know its going to be expensive, I just want to make sure I get it right the first time and not have to go back and rebuild because I cut corners somewhere.

 

if you want to make the power and keep it on a budget go with the sc61

 

gt35r. Can make good power at low boost. Pick up some Blox type b's. You would make 450 at around 15-16PSI