That’s exactly how I understood the loop. Sorry if my explanation wasn’t clear. Your diagram represented it much better than I could have described. But we’re 100% on the same page about how the coolant flows. I should have started with a diagram.
^^^^^
I really hate to post this, especially considering how well thought out your response to my post was...but this is 100% what I said I was doing 
Sometimes, tone can get lost in posts like this. I’m not trying to be argumentative or take anything away from other people’s setups—I just see this as a poorly designed system.
Over the years, I’ve noticed a strange tendency in car communities to have an almost religious attachment to OEM. When I first started running the IACV differently than OEM on 300ZXs with a Haltech, there was pushback. When we first started using VVTi heads on the 2J, the biggest complaint was wiring complexity (which was just one wire) and tuning difficulty. Now, it’s common in well-optimized street setups. People tend to get attached to one way of thinking. Same thing we when redesigned the shifting system for the V160.
That said, as I clearly stated above, I’m not sure I’m correct on this and genuinely welcome thoughtful feedback.
Also, why has no one addressed the OEM feeding hot side of the radiator into the bottom?
