Temp variance between cylinders

[Will N]

Originally Posted by James Rogers

If all this is true, what is up with my Model T? I have 2 and have never run a water pump on either and never will. The cooling system is virtually the same on the T as it is on the A but I never experience overheating in it even in Utah in July or South Dakota same month or TN in August on a asphalt parking lot idling. I have seen ambient temps as high as 102 and no overheating even on a long pull.

The Model T is only 20 HP, and HP=Heat. The T doesn't have to get rid of as much heat as the A has to. The natural circulation of the thermosyphon is not impeded by or overidden by the water pump as in the A, which as Bob B mentioned, forces the water to take the path of least resistance from the inlet to the outlet, bypassing the rear of the block.