Stuck in traffic 340 got up to 220

512Stroker said
Well that will be an improvement over what you currently have.
Keep your eyes open for a 7 blade 18 Mopar clutch fan, if you see one get it and add it in the the future, I am confident that it will perform well in your application. The factory used them for a reason.

What is the pitch/depth of the factory 7 blade? I’m not sure myself but am wondering if is it more or less than the 6 blade Derale he is using which has a depth of 2-5/16” (28 degrees) The 17” aluminum blade version (that I have on a 78 D150) moves some air, but actually has slightly less pitch. I always understood it’s not so much the number of blades rather it’s the pitch. The one he is going to use is IMO a “heavy hitter” of a fan