just a thought...
Of course increased air flow is a benifit in any cooling system!
You are probably asking this question because you have been experiencing a heating problem. Hopefully the fix was in the new rad you are just putting in, but may not be. If the cooling system is all in good operating condition you shouldn't "need" the electric fan.
Check your fan clutch, there are heavy and light models and sometime extra heavy for hot climate cars with air.
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