Overheating 360 new engine

72Blu.
Post #77.
I understand thermal efficiency just fine, thanks. You do not. Waaaaaaay back in this thread that for reasons unknown, I noted the OPs engine runs hot. His engine is not the only engine that runs hot for unknown or non-obvious reasons. I offered some reasons for that, such as internal friction. Whatever! The OP has tried all the common fixes, still runs hot.

So now OP has two options: strip the engine to try & find the problem. Or, improve cooling so that it runs cooler. OP has chosen the latter.

You claim your fans pass 5000 cfm. Do you have any evidence of that? Your fans also have S blades which pull less air than straight blades.

This engine is going to need more air flow, more coolant volume, bigger radiator. These three factors are what will cool the engine. Either one on it's own or a combination.