Custom intake manifold (4AGE).. Measurements?

[SekiguchiUeno]

custom manifold is also my idea,

maximizing flow with smooth shapes, trumpetes and straight pipes.

but i dont know what for volume i should use.

for turbo engines its good to double the engine size also the manifold should be 3,2 liters and more depends on boost and hp figures

but i think for NA use its no good to get very much displacement over standart mani because the throttle response.


OT
dont wory about english
its also my 4th language

brittons and amis uses too much slang