What is the best way to know where to start retarding the timing. Should I start at 15psi(non-absolute pressure)and retard it one degree for every psi of boost? I have the AEM FIC so it reads in absolute pressure so Ill adjust it as needed. Just wondering wheres the best place to start on these engines. Also im running 8:1 wisco pistons and eagle rods so can I safely push over 20psi?