Hi gang, Running a flathead in my 40 Ford and I'm going with an electric fan. Wondering what thermal switch to use and where to install it. (Radiator lower/top hose, head..etc) also I'm running 180° thermostats on the engine. So what temp switch should I use? Thanks. Sent from my iPhone using The H.A.M.B. mobile app
At least I didn't ask what type of oil i should use in my flathead. Sent from my iPhone using The H.A.M.B. mobile app
I have used a 12volt electronic heater controller, and soldered a small tube to the header tank to fit the sensor into, with heat transfer paste. A byp*** switch or similar is also handy in case the controller dies. View attachment 4955297
What's the pros and cons of using the radiator over the engine for the thermal switch ? Sent from my iPhone using The H.A.M.B. mobile app
As long as you are sensing the return coolant temperature, it doesn't really matter. I checked the temps with a infra-red thermometer, and there was not much difference between the thermostat housing surface and the radiator tank surface. One less wire going to the engine.
Space, parts availability, time, etc. I put a different style in my ‘42 PU , the 221 I used had a fan on a hub that was too high and would not have a chance of clearing the radiator hoses. I guess I could have done the search, buy, wait thing. But stuck a electric fan on it because I had one, and truck was drivable in a day. Kinda like using a modern rear under your car instead of looking for what was available 40 years ago
Oh, and I have a 180 thermo switch on my electric fan in my flathead powered roadster. I installed it in the bottom of the radiator and have driven it for a couple of years and never once overheated.
I had heating issues in town. Stopping at every red lights and idling along just didn't get the air flowing enough. Never had a heating issue since I put the electric fan on.
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