Quote:
Originally Posted by Jerry Clayton
You have listed about every NO NO that is possible ----underdrive pulleys , small 16 non shrouded fan, non shrouded radiator, but does have a Kirkham expansion tank
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Agreed. That Zirgo may have been advertised at 3000 cfm but its likely not delivering that. After two Zirgo fans, 50/50 coolant mixtures, timing adjustments, Water Wetter, three boutique thermostats and every other method of voodoo blah blah blah it was the $50 eBay Taurus fan that solved ALL of my 427's cooling problems. The quickest way to confirm its your fan is to buy a little handheld infrared temp gun and compare your radiator inlet temps with your outlet temps. If you aren't getting at least a 35+ degree differential at idle, you aren't getting enough air across the radiator.
Just my 2 cents....