I have a Black Magic Electric fan on my Mustang with alum heads, intake, cam, etc... I have not had any cooling problems with my car. In fact, it now runs about 30 degrees cooler than when it was stock. I do however, have a Ron Davis alum radiator, an Edelbrock water pump and a 180 thermostat. I also deleted the A/C.
The point is, the Black Magic Fan can support much more than 225 HP with the right set up.
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fordgasm
CLICK HERE to see my 87 GT