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 bypass 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.
The Jalopy Journal
