Remember in that 408 overheating thread the last post was him using a mechanical fan and it bending and going into his radiator. Would have that happened with an electric fan?
One thing people need to be aware of is the RPM rating of the mechanical fan. If you look close, a lot of the "Flex-Fans" out there are only rated for 4000 rpm. Mainly because a lot of them are either all aluminum, or steel frame with aluminum blades. I don't run my motor hard, but I knew I would exceed 4000 rpm fairly often just cruising around when I chose to get on it a bit.
The one I chose was a Derale "Performance" fan. It's rated for 8000 RPM, and has a steel center frame and stainless steel fins. I think I got it from Mancini Racing if I remember correctly, but I could be mistaken. I ordered a lot of parts all at once when I redid my cooling system, so I don't remember for sure what came from where. Most came from either Mancini or Summit.
