Keeping your stock internal won't let you boost very much. Or you'll need gas with very high octane...
Compression:
B18c1 USDM = 10:1
B18c1 JDM = 10.6:1
B18c5 USDM = 10.6:1
B18c5 JDM = 11:1

Boosting your engine with a turbo create more compression and more compression result detonation if you don't have the right gas octane. For example, if you put a turbo into the b18c1 USDM you'll be able to boost 7-8 PSI on 94 octane (maybe 91 with fire retard...). If you want more boost you have to change your piston for lower compression pistons...
So putting a turbo into a type-r with stock pistons and normal gas is bad.
A b18c1 at 7-8 psi would be great. I have a 98 GSR and the performances are very impressive since it's a 1.8 liter. Adding a turbo at only 7-8 psi would make it a pocket rocket.