Quote:
Originally Posted by DougVieyra
What are the functional pluses and minuses of an original 'round tube' radiator (aside from originality) ; and what is it that the more modern type has over a 'round tube' ?
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Tubes progressed from large round to smaller round to oval and eventually flat in an ongoing effort to increase the amount of surface area of the coolant touching tube wall and, concomitantly, the exterior tube wall touching the fins. The geometry of the flattened ellipse allows coolant to touch tube wall and the round tube has more coolant touching other coolant (within the tube).
OEM seamed round brass tubes would sometimes split. The tubes we use are made of copper and are drawn multiple times to achieve a thinner wall. The result is a thinner wall which affords more rapid heat transfer and lighter weight.