Can s14 KA24DE engine be swapped into s13 without swapping ECU and wiring?

u need ecu and wiring harness

s14 dohc , s13 dohc engines are the more or less the same … u can take one out and put in the other.

If ur getting doing a Dohc conversion into a sohc then u need a bunch of stuff - search nico.

Yes it can be, you will just need to swap a couple things off of your old motor.

things that i can thing of: