[Neutrino]

Originally Posted by GreyGoose006

well on a turbo, between the turbo and the manifold should be 2-2.5".
after that, i dont see how it matters.

on an NA car, i dont see how the exhaust matters either.

using general statements like that number you pulled out does not count for solid engineering that takes into consideration advanced physics regarding gas flow. Even small changes in the shape and or size of the pipes can create turbulences in an otherwise close to laminar flow.


Try looking researching a bit fluid dynamics and you might start to understand that things are not so simple. Unless you think it doesn't matter to the plasma flow in a fusion reactor if its shape is circular or more like a "D".

And yes on NA cars the exhaust matters a lot, did you not read my post or something?