Honda Car Forum

There are no ready answers outside of performance mods to your stock engine...COMPTECH, a premier Honda & Acura performance shop just closed its doors...sadly. They had just developed a 3.5L motor for the NSX.Like any other pathway to engine performance, start with the extremes outward, then work inward...e.g., CAI (one using a K&N filter) & cat-back exhaust. Eliminate restriction with high flow catalytic converter & low restriction resonators. Next, install headers. Install iridium plugs. Upgrade sparkplug cables. Install a performance engine management system (aka, chipset) that maps the timing, fuel flow, etc. for optimal performance. Install a high flow fuel pump. Install high lift cams (keep the primary / low RPM VTEC cam 'street drivable' should you want to keep this car on the highways). Install the cam by a competent shop that will simultaneously install stronger valve springs. Upgrade valves & guides. Port the head for even better flow. Consider higher compression pistons. The mods external to the engine itself can be peformed by amateurs, the 'internals' are best done by a competent Honda/Acura race shop. Mugen, Japan's leading Honda race performance works group builds NSX motors to the mid-300 HP range in a conventially aspirated mode. The engine could probably be built to even higher levels, but at the expense of compromised reliability. Forced induction (currently only turbochargers are available in kit form) would be the simplist means to get serious power gains. Still rework the exhaust to insure the greatest gains. I'd be happy with 400 flywheel HP from a turbo...some will exceed 500. It's all about how much $$$ you're willing to drop into the car...it can become a deep well if you go all out.The stock NSX (ref later 3.2 MT models) is good for sub 5 second 0-60 speeds. Non turbo mods getting you into the mid-300 HP range will give your call all the speed on the road that it would ever need. Track racing agains the likes of C6's & 911's of course would be a different matter.Happy motoring!

The bestway to go is to keep the stock motor and modify it from there. You know, cold air intake, turbo, etc.

well leave the car alone

Modify the stock motor