Quote:
Originally Posted by arghx7
You have to be careful reading a lot of those books. A lot of them are old and are not too relevant to the way modern manifolds are designed in the sense that everything is done with computational fluid dynamics models.
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CFD would be dealing with the inertial stuff, and this is mostly focused on acoustics.
Cosworth managed 170+ hp/L in 1982 with no CFD, so it's not the end of the world not having access to it.
But you are correct on some of the atrocious old manifolds in some of the road car examples. The 'siamesed' 3 port on a 4 cylinder makes me shake my head. Plus non-crossflow heads... But some of the carb stuff applies to ITBs. And some of the old factory designs are superior to current ones thanks to not having to fight with catalyst placement and emissions.