Hope all of you are fine.
From many of days, I am thinking to take opinion here on PW because I have very little knowledge about this.
I have civic 99 vti oriel automatic running perfectly no problem at all. Currently engine bay has D16Y5 VTEC-E engine.
If I want to put D15B 3 stage vtec in it with stock automatic transmission, then it is obvious that ecu have to change because due to 3-stage vtec, engine wiring has to changed. What other have to be changed?
Is automatic transmission can be coupled with d15b 3 stage vtec. What other changes have to take, I want to know from experts.
Comments from @capsat, @xulfiqar and others are highly acceptable.