actually, The NSX engine is known to run forever as high as 250k miles on a stock engine. The magic number seems to be 400 whp where you need to start adding things to help out. Science of Speed has a mile engine build for their supercharger that runs about $6,000. The engine isn't that solid for forced induction beyond 500whp. I know someone with a wicked turbo setup pushing 550 at the wheel and he has built up his engine since he blew a rod.
I will probably drive it as is for awhile and then consider beefing it up in a year or so. It feels pretty solid right now. I can't wait to track it. They live to be driven on the track since that is where you notice how well balanced the car is.
335i coupe Montego Blue Dinan stage 3 tune, Advan RS wheels 350whp/365wtq
1994 Brooklands Green Acura NSX Comptech Supercharged 390whp/300wtq