Originally Posted by snrusnak
The flex fans are worse than a clutch fan. Even though they flex at higher rpms they rob power at cruising rpms, where the clutch fan doesn't.
On top of that, I snapped a water pump housing off with one at high rpms. None the less, flex fans and batteries blowing up in your face is worst thing anyone could imagine if you get hit by one. I'm with you, I wouldn't recommend a flex fan to anyone.