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Originally Posted by Ricochet
Nitrous will slowly eat your internals away on that engine, especially with them all being stock. Turbocharge it for like $2500 all said and done, run about 8psi, and you'll take GT's.
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I wouldn't boost the D15 to 8psi. Period. The D15 has some of the weakist internals on a honda. 8psi on a D15 is a little high, it's weaker intenrally than an H22 and F22, and you should only run those at 6-7psi if you want to be safe. The rods are flimsy, etc, on the D15. I had a D15, I wouldn't waste the $$ turbo'ing it. If you want a Turbo motor, save up and get an LS (B18B1). It is the best honda motor to boost. It can handle up to 12 psi on sotck internals, and the longer tranny gears is better suited for turbo apps, to name a few reasons. If you want to go NA, the B16 or B18C1. Still, the LS itself wont cost you an arm and a leg, when compared with the GSR, etc. But if you seriously want a turbo'd honda, save your $$, swap in an LS and turbo that. Every bit you spend on the D15 now is less to spend on whatever it is you really want later. As I said above, internally, the D15B7 is one of the weakest motors honda made, in terms of internals. Plain and simple, it won't hold up well under boost. If boost is your thing, save your $$, the LS will hold up under boost.