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Cooling setup
And now, to turn our attention to the cooling system.. Since I wiped out a bearing and had to replace my stock oil cooler anyway, I ended up going with an OEM N55 water to oil cooler for faster warmup and less pressure drop. Of course this adds heat rejection into the coolant circuit, so I figured I would offset this somewhat with a CSF radiator and call it a day. But after studying the 1M/335is/PPK aux rad setup closely I came to the realization that the aux cooler uses EXACTLY the same heat exchanger as our stock oil cooler! Did a bit of thinking and decided it would be both easiest and best to run this in series with the N55 oil cooler, so that the coolant going into the oil cooler is a little bit cooler than that of the engine, basically trading off a bit of coolant-side effectiveness for oil-side capacity. I can always have a custom, higher-capacity heat exchanger made in the future, but preliminary testing has shown that oil temps are noticeably cooler with this setup already...
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