Hi guys, I have a question regarding twin turbos. I have been learning a lot recently about how turbos work. I now know that sometimes it pays to have two turbos. One can provide instant power (with lighter components) and the other can provide more power higher up the rev range.

My question is, does this affect the amount of air inlets to the engine? I have noticed on a twin turbo Porsche (928 I think) that their were two air intakes, it almost looked like one for each bank of the engine. I beleive the car had a twin turbo. Was this because it was a twin turbo? Are the turbos configured to work at different rev ranges on different air supplies or are their actually a turbo and air intake for each bank of the engine (seperate?) I would have thought that if the turbos were simply for power at different revs they would run of the same air supply? I haven't had a look at any quad turbo engine bays but would they have four air intakes or just one?

If any one could shed some light on this it would be much appreciated.