Quote:
Originally Posted by 3798j
Also consider...turbos quiet exhaust quite a bit plus the 1.6 V6 engines are limited to 15,000 rpm, but rarely exceed 12,000 rpm during a race due to the new reliability (three ICE's for a season or grid penalties) and the dreaded fuel flow restrictions. Plus, when the new engine regs were being considered, inline 4 cylinder engines were initially part of the discussion but Adrian Newey pointed out that a change to a V6 would enable teams to still carry the engine as a stressed member, whereas an inline 4 would have required a space frame. The same would apply to an I6. Additionally, it would be hard to imagine Ferrari embracing an I6 engine formula.
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The 3 power unit rule is new, the hybrid cars never went up to 15k though. Im pretty sure they dont go to 15k because the engines lose efficency and it doesnt make sense to rev them out to 15k from a performance point of view.