I've replaced my Honda 2003 1.5 l engine with vtec 1.7 engine, do i need to replace car s computer too?

I've replaced my Honda 2003 1.5 l engine with vtec 1.7 engine, do i need to replace car s computer too? - 1

Yes and I wouldn't be surprised if the wiring harness needed replacing too! Were there connectors for all the sensors on the motor? I doubt the 1.5 liter motor and cam advance actuators and solenoids. By the time you get done with this Frankenstein project I'll bet you could have bought a different vehicle cheaper!

Almost certainly unless it can be reprogrammed or a piggyback chip fitted.