GT-R R35 Plenum Test Fitment on my VQ37HR

DIGItonium

If you look at the VR38 valve cover, the oil spout is a separate piece attached to it. It is also angled further away from the plenum. Either that or your options for oil caps are very limited. GTM uses a very compact oil cap. It is ugly, but it clears the plenum. The VR38 engine cover definitely needs to be cut to make it easier to access the cap as well. Otherwise, it'll require removal each time.

Do you have the balance tube attached to the plenum? IIRC, someone posted white papers about the intake design of the VR38. It's crazy, but that tube diameter plays a role in affecting midrange torque. If anything, maybe you can fab a custom tube with an adjustable knob one can use to adjust the airflow through the tube. Just an idea... [shrugs].

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ChrisUR

@DIGItonium

thank you for sharing your thoughts ! You are correct that the oil cap will be a though issue but we will find a solution.

For the balancing tube we will definitely have to fab a custom connection as the stock tube does not clear all the things which are behind the plenum already, most importantly the VVEL motor !

I think we will do 2 options to start with, a pair of block plates to cap the balancing ports and a custom tube which clears with the 370Z engine.

We will then dyno both setups to see how the balancing affects torque throughout the rpm band.

For FI setups you should definitely have the balancing so I can imagine to offer different diameters, e.g. -6AN, -8AN and -10AN so people can play around with these to find the perfect match.

Current time schedule is that we need to weld the lower manifold as one piece and then continue with the fuel setup - this will happen during next week, so more pics are coming next weekend !

Chris

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