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Subject: 8N V8 conversion

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jeff walker    Posted 08-31-2018 at 20:06:20 [URL] [DELETE]        [Reply] [Email]  
  • 8N V8 conversion
  • Does the original 8N radiator have enough capacity to properly cool the flathead V8?
    I converted an 8N with a 51 model flathead, I set the timing correctly, installed new water pumps, incorporated a coolant additive and installed an electric fan, the tractor seems to run a little hot [180-200 degrees] under a load. Any suggestions to cool engine down would be appreciated.

    K.LaRue-VA    Posted 09-02-2018 at 21:40:23 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N V8 conversion
  • The Ford flathead V8s were notorious for overheating. There were issues with the water pumps that are best solved by using the modern pumps with better impellers and bearings from Mac's Auto Parts or Speedway Motors and others.

    How is the plumbing hooked up? Engine with two inlets and two outlets. Radiator with one inlet and outlet. Plumbing may be causing problems with flow. There was no mention of thermostats. If there is no thermostat or other restriction, water may flow thru the radiator too fast to get much benefit from the fan.

    The 8N radiator has plenty of capacity for the original 4 cylinder, but seems small for the Flathead V8. I did not consider using the 8N radiator was an option. I bought a new radiator that was built specifically for the flathead V8.

    Richard NY 2N    Posted 09-01-2018 at 16:21:26 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N V8 conversion
  • A local guy here is having overheating issues with his 8n v8 conversion. He had the radiator recored to 3 rows and added a honda radiator where the gas tank used to be. This tractor goes to shows and a parade now and then. Last year it got to hot for the September event and pulled over. We will see what this year brings!

    Bruce (VA)    Posted 09-01-2018 at 15:23:11 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N V8 conversion
  • Is that temp from a temp gauge? Mounted where?

    A shroud will help if the tractor is stationary or pulling a load in first gear. Much faster than that, you don't get much benefit from a shroud.

    It will handle 180-200* just fine though.

    steveVa    Posted 09-01-2018 at 13:06:42 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N V8 conversion
  • Dual fans or bigger electric fan.
    Add a heater core/coil with another fan as another radiator.
    Where are you pulling the temp from? I would use an infared and check several places.

    Tony C    Posted 08-31-2018 at 22:33:06 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N V8 conversion
  • 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.


    acadianbob    Posted 08-31-2018 at 21:58:51 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N V8 conversion
  • Do you have a shroud around the radiator?

    Tony C    Posted 08-31-2018 at 23:13:31 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N V8 conversion
  • Yep good point.

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