Cooling System vs Outside Temps

[31 Model A]

How much, on an average, higher per degree of temp outside would the temp rise in the cooling system? Anyone ever figure something like this out before?
Of course it depends a lot on the rad, water pump; etc but saying the WP and the rad are good, the system was flushed out.......etc etc. Starting point 75 degrees outside temp, rad temp is 150, running with distilled water after it warms up and after a few miles, then same condition but outside temp is 90 and the system has 50/50 anti-freeze? How much of an increase in the rad temp would there be?

[larrys40]

Your ambient will always be a factor but not degree for degree . I know after we replaced the radiator you're running well and not having the overheating.
Gery bergs radiator did the trick. Thanks Gery !!
Lets see what a few other scientific minds have to say

Larry

[H. L. Chauvin]

Appears even if the equation were posted, it could confuse some people.

Sometimes, thinking in simple terms helps.

A. First Test: On a 70 degree day, a guy has a two (2) empty, three (3) gallon radiators, (plugged at the bottom so they can hold water), which he fills both with 212 degree boiling water. He leaves one in 70 degrees, and places the other in a thirty-five degree cooler. How much faster will the one in the 35 degree cooler get down to 60 degrees than the one in 70 degrees? And,

B. Second Test: On a 70 degree day, a guy has a two (2) three (3) gallon radiators filled with 200 degree water which is circulating with water pumps and water for each is being heated in a separate closed container with a gas burner. He leaves one in 70 degrees, and places the other in a thirty-five degree cooler. With both burners still operating, after 3 hours, the water in the radiator in 70 degrees stays at 200 degrees. How much cooler will the one in the 35 cooler get?

C. Third Test: Or maybe, once potatoes are simmering in water in a covered pot at 205 degrees, in a 70 degree Kitchen, what happens to the water and potatoes when one brings the stove and covered potatoes outside where it is 35 degrees?

Something tells me most of our grandmothers would have better answers than us as today's modern Model A owners.

[31 Model A]

Originally Posted by larrys40

Your ambient will always be a factor but not degree for degree . I know after we replaced the radiator you're running well and not having the overheating.
Gery bergs radiator did the trick. Thanks Gery !!
Lets see what a few other scientific minds have to say

Larry

Thanks Larry........Just wondering if there was a known ratio between outside temp and what the water cooling temp would be if the cooling system was in top condition when using water vs coolant.

[V8COOPMAN]

Not much of an A-bone guy here, but most V8s that are able to maintain roughly 100 degrees (or less) water temp above the ambient air temp on a hot day are considered to cool adequately. DD

[H. L. Chauvin]

Sponsored Links (Register now to hide all advertisements)

There could possibly be an alphabet of variables plugged into an empirical equation for applying to all Model A's & Model A owners; for example,

Specific differential ratio, engine RPM's, bore or overbore size, painted or unpainted radiator, clean or dirty radiator, 4 blade or 2 blade fan, Town Sedan or Roadster weight with or without passengers, flat land or hill country, vehicle speed, head wind mph or cross wind, engine pans or no engine pans, type coolant, spark timing, etc., etc.

Bottom line appears to be if one's radiator coolant is at a marginal 208 degrees while traveling at 5:00 a.m., in 50 degree weather ...... the coolant temperature will increase at 10:30 a.m. when traveling in 95 degree weather ....... how much ???

For safety's sake to not ruin a good engine ...... maybe trying a test run on one's vehicle would be a good start.

Hope this helps for an estimate.

[pgerhardt]

V8COOPMAN
I like your avatar. I brings me back to when I was a kid watching Sky King on Saturday mornings.

[V8COOPMAN]

Originally Posted by pgerhardt

V8COOPMAN
I like your avatar. I brings me back to when I was a kid watching Sky King on Saturday mornings.

You have a good eye, as that is Sky's original Cessna T-50 "Songbird", N67832. DD

[Y-Blockhead]

I don't see much difference at all. 160-165°F most of the time.

Once the engine has warmed up on a cooler morning I believe the thermostat opens just enough to maintain 160-165°F. As the day gets hotter the thermostat goes WFO and my engine runs at... 160-165°F

Very rarely does it ever climb higher, maybe on a long uphill climb (not many around here or long periods of idling in traffic (which I avoid if I can).

Before I installed the thermostat the car ran too cool.

[BILL WILLIAMSON]

The answer is EASY, when the AMBIENT temp gets HOTTER, EVERYTHING gets HOTTER !
The Dog's panting tongue tell me when it's TOO HOT to go outside. Did you know that a Rat Terriers' short hair is hollow, to protect him from the HEAT/COLD?--Polar Bears sport hollow hair, also.
Bill W.
Bill W.

[Tom Wesenberg]

Whether it's 50 or 100 degrees outside the engine block should stay about the same, if you use a thermostat. And, of course, we should all use a thermostat.

It would be interesting though if someone not using a thermostat would shoot the block temp on a cold day and again on a hot day.