I would say in general, no. Overlap is used to to squeeze a bit more air/fuel from the intake side using the pressure drop created by the exhaust side. With a turbo you're going to have a larger motive force on the intake side, so a large overlap could result in forcing your intake side air out the exhaust. Of course this would vary from engine to engine depending on back pressure, flowrate from the turbo, etc. __________________ '96 318ti Base - few mods installed... |