i am a newb with honda and i dont know what ecu to use with my h23a blue top i am planning on fully building the engine and having stage 3 cams. the computer that i am running right dosent have vtec and im not sure if its for the h23a but it still runs good. what ecu do i need to run and do i need to chip it.

 

What year car is the motor currently installed in?

If it is OBD1, just run an OBD1 chipped P28. It is always highly recommended to have the car tuned after doing any engine build or cam swap, so I would look into having that done as well.

 

word conan

 

As previously mentioned, a chipped obd1 vtec p28 spec ecu would work.

Keep in mind that a "stage 3 cam" isn't necessarily the best cam for your build.
Make sure you use a cam that isn't over kill for your setup or you will make less power then you would have on a stock cam.

Read over http://www.phearable.net/tech/efibeginnerguide.html to educate your self on chipped ecus / tuning etc.