GT-R R35 Plenum Test Fitment on my VQ37HR

phunk

A few pounds of weight, thats probably it.

As a builder of the occasional custom intake manifold (heres our DE model; pic), ive studied tons of OEM designs and racing designs of intake manifolds. The GTR plenum is one of the most basic and conservative designs found in OEM intake manifolds.

I have a GTR plenum sitting on my desk for the last year or so. Id save the work of building a way to put the GTR plenum on, and just build a new plenum all together designed around greater top end power production.

I have not done a displacement measurement of the GTR plenum versus the VHR one, but its going to be very close and I bet the VHR is larger. But before you go through all the work, thats one thing I would do.

The runner length appears longer also but may be very close, I havent bothered to measure because without the GTRs entire engine here I cannot measure it from the stack all the way to the back of the valves which is the information needed to say one way or the other. But by the time its resting on top of a VHR and clearing the valve covers I bet its going to be longer runners than stock.

Ultimately the GTR manifold looks like it was designed with low end torque in mind, most likely because of the rather low 9.0:1 compression ratio of the engine combined and auto trans... the manifold seems to accomodate that with a design to help increase throttle response and engine "motivation" in the lower RPM.

Its my personal belief its going to be a huge dissappointment. But I really cant wait for someone to finally do it and dyno it to settle that question.

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