Motordyne M370 is it just a 350Z plenum?

wstar

Yes, it's a 350 manifold with the holes re-drilled to mount on our engine. It changes the length of the runners to shift the powerband downwards a little, and seems to make a net gain over the whole range in trade for a little HP loss at the peak RPMs. The main point of debate is that most of those gain charts are swapping manifolds on a car without changing the tune. I think the few that have tried tuning the ECU with the old manifold and then tuning with the new see very little net gain. In other words, the ECU fine-tuning and the manifold seem to overlap on gains considerably. Not enough data to say for sure though.

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Journal thread / Car setup details

DEpointfive0

WStar, I always appreciate your input, and I think you were the first guy who told me its a 350 plenum (now if only I can get the guy who says that it's a 370 intake that has been modified to chime in, we can have an Internet battle...) I personally think its a 350 intake because if you look into the plenum you can see different openings a difference to how the air is channeled...