[Firebob]

Hmm. If you ( and car craft ) says so. I swear I can feel the motor draw down a bit when they come on. Maybe not as bad as I think it is but still.
Here's what I'm saying about the fan size and the area that air is being drawn through the shroud. My core is 23"x17" and the fan draws air through a 15" opening. I'd have to do the math but it's probably Pulling air through less than half of the core area. The rest of the core isn't getting any help cooling circulating coolant at lower speeds when the majority of my issue presents itself.