Nismo intake

Caravanshaka

so, if the stock airbox is pulling air from outside of the engine bay (most airboxes I have seen do this), then the gains seem to be coming from either:

a) more filter area, allowing more flow
b) less restrictive piping between the airbox and the intake manifold
c) possibly larger diameter tubing around the MAFS tricking the ECU into leaning out the mixture for a few extra ponies

Could we build an effective intake system utilizing the stock airboxes but improving the flow between them and the intake manifold with aluminum piping? Could we build a whole new intake that takes an "airbox" design that sucks air from the front but still uses a conical filter and velocity stack inside a more efficient airbox in the stock location for the best of both worlds?

maybe I need to learn how to weld aluminum now....

Modshack

All 3 actually. I have silicone hose coming that will remove the accordion pipe and replace it with a smooth walled 2.75" ID. It will mate with the stock airbox if you choose to do this, though I'm going to mate it with my shielded boxes and larger ID MAF tube.. For "B", All you need is $100 or so for the Hose parts (45 degree elbos, straight tubing ,couplers and clamps).

I still need to work out the PCV breathers that will attach at the machined couplers.


Mock-up...Still needs trimming and fitting:

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