We upgrade the ECU in our 30-year-old NSX to the advanced Motec M150, and ditch the throttle cable in favor of a Drive-By-Wire setup to take full advantage of new tools and tuning strategies that modern electronics and technology has to offer.
The factory NSX ECU sits behind the passenger’s headrest. Note, the original throttle cable was already removed in this photo.
Initially developed in the 1980s, the NSX’s original ECU features a lot of capacitors and small chips to control the 3.0L V6 engine. The amount of work that Honda engineers have put into the original ECU and calibrating the engine is very impressive, but this 30-year-old technology is no match for the sophistication and features of a modern ECU.
We placed the new Motec M150 ECU in the original place of the factory ECU. Surrounding the Motec is a 3D-printed template to dial in the location and angle of the four ECU mounting points.
Our new CAD and 3D printing skills once again come in handy as our ECU bracket starts to become more refined.