Custom 3D Printed GTR Style Intake Plenum Project

RanRich

Is it just me or does the manifold appear to pinch at the front? Wouldn’t this variance in plenum size as it relates to each runner be problematic?

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AAM | Dynosty | Ecutek | Eibach | Hawk | H&R | Nismo | Stillen | Stoptech | Z1

FPenvy

the pinch works.

based on air entering at the rear of the intake (and also specific runner length/diameter come into play) the main air chamber carrying the air needs to shrink due to loss of velocity.

i think i said that correctly.

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324whp/258wtq AAM Tuned |F.I. NonRes CF CBE/NonRes TestPipes #373|UpRev Tuner|Akuma Motorsports Intakes|Z1 34 Row Oil Cooler

Cpt. Obvious

FPenvy is correct. The pinch at the front is designed to equalize the pressure in the manifold.
Being that the front intake ports are further away from the throttle bodies, the smaller size will slightly compress the air for the purpose of balancing the air pressure in each cylinder.