Hot running 440 60" over

[Jeff Peterson]

I will tell you my experience put a bigger water pump pulley on it to increase the speed of the water pump. I had a customer we built a 512 stroker on pump gas, for a 4x4 truck and he wanted a serpentine belt system. The engine ran hot, swapped out radiators, high flow pumps, even took the heads back off and opened up the coolant holes in the head and block, changed to a bigger pulley problem solved. just use a stock A/C water pump. From your picture the pulley looks small to me.

You have it backwards
To increase the RPM of your driven pulley, you can either increase the motor RPM or decrease the diameter of the driven pulley.

 

[Armyvet25]

My '62 convertible had a .060 over 440 with AC. I used the factory radiator, shroud, fan and fan clutch. With a 180 thermostat it never exceeded 180 idling or on the highway.

agree..
same here, race built 383 cammed-stroked, stock fan and radiator, never over 180-185
Ditch the electric fans, quadruple check the timing, maybe to much at high rpm, might need to re-curve the distributor so when you set you initial timing then you can dial in max around 36-38 obviously depending on your build. Make sure your not running lean at high rpm's, might want to install an air to fuel ratio gauge.

 

[Phoenix440]

agree..
same here, race built 383 cammed-stroked, stock fan and radiator, never over 180-185
Ditch the electric fans, quadruple check the timing, maybe to much at high rpm, might need to re-curve the distributor so when you set you initial timing then you can dial in max around 36-38 obviously depending on your build. Make sure your not running lean at high rpm's, might want to install an air to fuel ratio gauge.

Good thinking, never thought of that. The distributor is set for full advance at 2800 rpm( that's about the cruising rpm on freeway) which could be an issue although doesn't ping.

 

[Phoenix440]

Going to try seals first, makes sense that a lot of hot air circulating back to the radiator would increase temp.

 

[QuickBpBp]

Just a thought, the car has a reasonably large trans cooler right in the centre of the radiator, with an air gap from radiator of a few inches. Anyone think this would be causing enough restriction to cause over heating? Have thought about trying to relocate the cooler but not sure it would make much difference.

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Maybe try relocating the cooler off to one side to allow better air flow. Also it doesn't matter how fast you are driving down the highway when NONE of the air is going through the radiator. It's simply being blocked by the cooler and the electric fans.