In Reply to: 8N V8 conversion posted by jeff walker on August 31, 2018 at 20:06:20:
First question: What kind of work are you doing that would load a flathead V8 in an 8n that would generate that much heat? If you are using it for stationary power turn the fan around to blow.
180 to 200 shouldn't be a problem if the cooling system is pressurized to 4# + and can maintain it. If the radiator, hoses and water pump(s) are in good shape you won't have a problem. The flatheads have enough cooling capacity to handle any load you put on it. Key is to let it idle and cool down to 180 or less before shutting it down.
Back in the day when working on a Wi dairy we ran a WD45 for eight hours plus a day on a blower filling a couple of Harvestore silos. THe old WD handled temps of 200*-220* with no problem. Reversed the fan of course for that job.
For your application think about using Red Line (or similar) Water Wetter in the cooling system with straight water if you can. It does best with straight water. It loses some efficiency when added to coolant, but it will reduce temps.
ANd yes... I'm ready to be flamed for even suggesting running a machine at those temps.