The computer is designed to run one type of engine. Every sensor on the engine, fuel injectors, oxygen sensors in the exhaust, exhaust manifolds/pipes, motor mounts and wiring harness(es) are designed for that engine. And that transmission might share the same computer as the engine too, not only that, but your dash board is different too. You are better off keeping the original engine type if this is your everyday driving car. There are many things you can do to the cylinder head and valves and valve springs to make the car faster. For a start, look into port and polishing the head. The things you can do are almost unimaginable, and in the end it may not even matter if you have the smaller engine.
Thursday, August 18th, 2011 AT 12:52 AM