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Old 07-28-2017, 08:43 PM
Cobranut Cobranut is offline
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Join Date: Mar 2000
Location: Virginia, USA, VA
Cobra Make, Engine: Genuine original Unique MotorCars 427 S/C, with a Genuine original Ford 427 Side-oiler.
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If the ERA fans are the original type, approx 10" diameter unshrouded aluminum pusher fans, they're more ornamental than functional.

Better to ditch the flex fan, and use a pair of good electric puller fans in a shroud which fits your radiator properly.
Use the largest fans that will fit properly.

I have both, the original type and two pullers behind the radiator. My 12.5: 427 will sit in traffic in extremely hot weather literally forever. I've never seen the temp exceed 210* with a 180* thermostat, and the fan controller set to turn on around 190*.
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