440 heating only on highway speeds

[josephqatarcarguy]

i just got a 69 superbee done with the same symptoms .... just think its too hot of a weather to drive a 440 under 220 temps ...

 

[WileE]

Didn't read all the posts but a high probability that your fans are acting like a baffle at highway speeds. Get rid of them & use a factory clutch fan. Also, w/pump should be overdriven 10-20%.

More info here: www.stewartcomponents.com

Agreed, I already mentioned that in #4.

 

[1 Wild R/T]

Didn't read all the posts but a high probability that your fans are acting like a baffle at highway speeds. Get rid of them & use a factory clutch fan. Also, w/pump should be overdriven 10-20%.

More info here: www.stewartcomponents.com

That really depends on the design of the electric fan....Lately I've been looking at these for a project I'm working on... Less blockage than a clutch fan, close tolerance between the fan blade and the shroud, shroud effectively seals to the radiator core... And high CFM...

18" Brushless Fan Kit

 

[RJRENTON]

If the water flow is to fast it will not release its heat
Try driving at lower speed and gear so motor is at 3000 and see if same result if so add a restrictor or lower flow water pump

ABSOLUTELY AND TOTALLY INCORRECT B.S. ANSWER.......the higher the velocity of the coolant will move more heat.....in terms of Btu/gallon per minute (gpm) or whatever quantity you choose....you've obviously never heard of thermodynamics......the science of heat transfer.......
BOB RENTON

 

[Dan64]

Don't know what style shroud you have with the fans but if there aren't any "air doors" ( basically holes with rubber flaps over them) the shrouds can act as a air dam at speed , not allowing enough air to flow through the radiator. This happens more with sheet metal shrouds that cover the whole back of the radiator.

 

[68-500]

ABSOLUTELY AND TOTALLY INCORRECT B.S. ANSWER.......the higher the velocity of the coolant will move more heat.....in terms of Btu/gallon per minute (gpm) or whatever quantity you choose....you've obviously never heard of thermodynamics......the science of heat transfer.......
BOB RENTON

Ive often questioned the you can move the coolant though the radiator to fast theory.

 

[bm02tj]

It happens and I have only seen it one time

 

[Sixpactogo]

Normally the overheating problem comes up in stop and go traffic. If you are overheating at highway speeds, I'm wondering if you are missing the hood-core support seal allowing the air to not be forced thru the radiator.

 

[RJRENTON]

Ive often questioned the you can move the coolant though the radiator to fast theory.

Who's theory is it?? Where did you learn of this "theory"...Or is it just hearsay from some "buddy"? What about the coolant that remains in the block and heads ...getting hotter and hotter......the cooling system is a product of 2 heat exchanger systems: block/heads plus radiator plus water pump being the common component. The other most important factor is surface area.....the more area to collect heat (block/heads) the more surface area to dissipated the heat ( radiator) and the circulated volume (gpm) at a specific velocity (ft/sec) AND THE SPECIFIC HEAT CHARACTERISTICS OF THE COOLANT (rate at which the coolant adsorbs/absorbes and releases heat)......to be specifics.....numbers must be disclosed.....temperature in/out of the coolant and air temperature in/out of the radiator ........ as mentioned, thermodynamics is an exact science of heat transfer......
BOB RENTON

 

[68-500]

Who's theory is it?? Where did you learn of this "theory"...Or is it just hearsay from some "buddy"? What about the coolant that remains in the block and heads ...getting hotter and hotter......the cooling system is a product of 2 heat exchanger systems: block/heads plus radiator plus water pump being the common component. The other most important factor is surface area.....the more area to collect heat (block/heads) the more surface area to dissipated the heat ( radiator) and the circulated volume (gpm) at a specific velocity (ft/sec) AND THE SPECIFIC HEAT CHARACTERISTICS OF THE COOLANT (rate at which the coolant adsorbs/absorbes and releases heat)......to be specifics.....numbers must be disclosed.....temperature in/out of the coolant and air temperature in/out of the radiator ........ as mentioned, thermodynamics is an exact science of heat transfer......
BOB RENTON

Oh most definitely hearsay. I do know there isnt much bending of thermodynamics. But Im also not educated enough in them to draw a conclusion that you can or can’t move coolant to fast though a heat exchanger.