Return of a Tuning Tale. Chasing classic knock

[XfireZ51]

Thx Erik. Glad u find this informative. As we all know, an ICE needs air/fuel/spark. Just as we expect each spark plug to provide the same level of combustion ignition, we can?t overlook how the injector is providing the necessary proscribed fuel. Uneven fueling leads to compromises in the tune. In our case, the 16 injectors actually makes it a bit easier to even things out when both primaries and secondaries are in operation. That?s why I think this exercise has highlighted an additional benefit to deletion of running in Valet mode or on primaries only. Of course, its not necessary to yank everything out. Simply have the secondaries begin operating just off idle.