suprfast

what is the factory fan ratings for our fans. one of my fan motors just went bye bye and im looking at upgrading. i remember reading in the past that the stock fans are about as good as it gets, but i have a tough time believing that. flex a lite seems to have a few 1000+ cfm fans and just be cool has a few also(looking at a summit magazine). has anyone else every pondered this and what was your approach.
lastly, what is the exact dimensions of the core for the koyo and the koyo as a whole?
kris

duboisr

I for one have never read any info on the stock fans . The 4 blade will out flow the 5 blade . You can feel and hear the differance .