[Richard L]

OK, I will explain this another way...

Lets say every 100BHP requires 550cc of fuel

1. Your pair of 550cc primary injectors at 50% DC will fuel up to 100BHP. If you do not require to injector water/methanol before 100BHP, then the summer is unecessasy. Just run off the secindary injector.

2. Your pair of 1600cc primary injectors at 50% DC will fuel you up to 290BHP. In this case, you do need the summer. I believe at thsi power level, wmi is require to raise your in-cylinder cooling capacity.