Stock clutch fan or electric?

mgarcia7 said:

Thanks I think ill do that cause thats exactly what my coupe is doing.

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You will be wasting your time putting an electric fan on a stock one row radiator.
Your problem is probably a clogged and worn out radiator combined with lack of capacity.
Before even considering any other cooling mods, get yourself a mr gaskets 180 thermostat and a good size radiator.

^^ What he said

jrichker said:

OK: 14 volts at 30 amps (constant draw) = 420 Watts. That's about .58 HP without taking into consideration the efficiency of the alternator.

So how much HP is necessary to generate the 420 watts with an alternator of the type commonly found on most automobiles?

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It seems that a Google search provides the answer to my own question. According to Alternator - Wikipedia, the free encyclopedia, the efficiency of the typical automotive alternator is 50-62%. Using the worst case figure of 50%, that means our 420 watts out power takes 840 watts of power from the engine to create it. Since 746 watts = 1 HP, divide 840 by 746 and we get approximately 1 1/8 HP needed to drive the electric fan. Compare that 1 1/8 HP figure against the 4-8 HP figure and you do save a small amount of HP. The chief benefit is better engine cooling around town and reduction of drag at highway speeds.