ok i finished my build for my z6 motor with a y8 head its going to be boosted as soon as i get the motor broke in im wondering for my break in period im going to be using my obd2 ecu.. when it comes time to time my motor will i use the z6 timing numbers 16 degrees btdc at 650 or will i use the y8 numbers 12+or-2 at 650 i know its a stupid question it should be the z6 numbers but im wondering if the ecu will work or be a problem

 

whatever head you use you go with the same timing belt as the head

 

im not asking which timing belt to use thanks anyway

 

use whatever makes it run better.