I have a 93 Prelude Si and I want to do a vtec converstion. I have already Located a H22A JDM head and am having it checked out for flaws and condition right now. I need to know exactly what I am going to have to do to convert the engine over to vtec. ECU.... Machining....etc... Im pretty sure that the ECU is going to have to be replaced, so could I just pick up an A'pexi ECU/Vtec system instead of installing an OEM ecu. I know that this is a fairly common swap but I just want to be 100% sure before i go messing with my baby.

 

Everything you need to know... http://www.hondaplex.com/conversion.html

Note that it is currently probably cheaper to just buy a complete H22a longblock and H22a ECU and swap it in.

Andrew