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EFV-8 Club Forum / General Ford Discussion / Keeping a Flathead Cool

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Discussion Topic: Keeping a Flathead Cool -- page: 1 2

sarahcecelia

03-23-2020 @ 8:39 AM

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The old timers used to race flatheads on dirt oval tracks. To keep them running cool they put stainless steel washers with a 3/4 " hole drilled in them at the water outlet on the heads.

They never overheated, and never over heated besause of a bad thermostat!!; Because the washers were the thermostats!

This is an old trick, that an old timer like me, saw in the 1950's when I was 16 years old, and remember it. And it works!!!

You can buy something like it from Robert Shewman,in the V8 times for about 50 + shipping, or buy the (2) washers for $2 and drill the hole in them!! Your choice.

Regards, Steve Lee

JayChicago

03-23-2020 @ 1:37 PM

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So the 3/4” hole was sufficient under the stress of oval track racing? So much for the theory that our engines need “high-flow” thermostats.

cliftford

03-23-2020 @ 4:41 PM

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Back in the day we were told that running without thermostats actually made a v8 run hotter because the coolant went through the system too fast to asorb heat from the engine.

TomO

03-23-2020 @ 5:23 PM

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The washer was installed to restrict the water flow on the cars. Breaking off water pump impellers was another practice to reduce the water flow. The early radiators were not sealed, and at high rpms water would come out the overflow and cap, causing overheating.

Thermodynamic studies have been done and prove that the more water that flows through the radiator, the easier it is to get a thermal balance and control overheating.

Tom

sarahcecelia

03-23-2020 @ 5:52 PM

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That's all a thermostat allows, but when it's fully open, there is some blockage by the flap.With the 3/4 inch hole in the washer,there is a freer flow.

Regards, Steve Lee

sarahcecelia

03-23-2020 @ 5:53 PM

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That's rightTom; and some guys cut one blade off the impeller on the water pumps to make them run cooler; but the washer trick is a lot easier to do.

Regards, Steve Lee

This message was edited by sarahcecelia on 3-23-20 @ 5:58 PM

sarahcecelia

03-23-2020 @ 5:55 PM

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That is just why the washers work Tom.

Regards, Steve Lee

trjford8

03-24-2020 @ 7:50 AM

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All the new water pumps have better impellers that move more water. Everyone that has used them indicate that their car runs cooler. This discussion has been debated numerous times, but it all comes back to a clean cooling system and moving more water.

This message was edited by trjford8 on 3-24-20 @ 7:50 AM

kubes40

03-24-2020 @ 8:10 AM

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Trjford,
I agree that many, but not "everyone" have had improved results with the higher than stock flow pumps.
Personally, I have never seen a difference. And yes, that's "clinically" checked with a laser probe.
I strongly believe I see no difference as I am not attempting to bandage over an existing issue.
All of my restorations include PROPERLY rebuilt engines, radiators, carbs, etc.

Mike "Kube" Kubarth

1931 Flamingo

03-24-2020 @ 9:10 AM

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48 block in a 40 coupe,NO t/stats, Kogel hi-comp heads with larger cooling capacity, engine and radiator clean, new pumps, when warm, gauge in the middle, with temp gun runs about 170, drops 30* from top of radiator to the bottom. Highway speeds maybe a little hotter.
Paul in CT

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