Yeah, so they went with normally aspirated engines, but even now they say the v10's are too fast. They are planning to go to v8's next season. How long until those engines get deemed too fast...Tomo Motorsport said:They ban turbos because today's technology would enable much higher horsepower numbers. And that would be too "dangerous". Plus there's enough rules as it is, they'd have to write another couple thousand for the turbo specifications, not to mention all the other hardware needed for the turbo.