Do I need to upgrade my alternator with these fans?

TrailBeast said
First off 210 isn't hot, and 210 after running sitting still for 20 min ain't bad at all since the viscous fan isn't doing much at those RPM's.
Also keep in mind that those fans are only going to run when stopped and the temp goes up.
Stopped and idling in the rain with the wipers, headlights, tail and markers, all your dash lights and the heater going might be an issue, but then the fans probably won't be running much at all in that kind of weather.
The MAD bypass will help but the engine will be at idle and not producing much charge anyway.

Yep, it's a definite who knows.:D

FYI, it's one of the reasons I run LED's in everything I can but I only have a single 20 amp electric fan.
I also have relays supplying my headlights, so I don't have that drain on the cabin wiring either.
Everything else is really close to what you are thinking you will have, and I don't have ANY low power problems even with everything I listed above.

Thanks trailbeast, I was thinking the exact same thing about running all of the accessories at once. If it's dark and raining the wipers, headlights, and tail lights will all be on, but most likely the fan will not even be activated so it really come down to finding out how much the contour fan pulls. I have a 20 amp fuse in my multimeter and ran it inline the battery and cable, with the key in the on position and headlights and running lights on, it was pulling 10 amps. I had just convertEd to the 60 amp 70+ style thinking, " this should be more than enough since I don't have AC, electric fuel pump, crazy sound system, and currently the heater hose lines aren't even connected to the heater so really I'm just running MSD, all of the lights, and a few speakers" well I had heard that electric fans only pull around 10-15 amps, I had no idea the contour fans pulled so much more. I'd like to run these since they are OE and I know I can go to the auto parts store and replace it if ever necessary, and I have only heard great things about them. Hopefully someone running these fans can give a more accurate amp number.