Dual Electric Fans on Carb'd Engine

[Neil B]

Hey guys, I've got twin Spal fans that pull some serious amps when they kick on. I currently have both fans on a single 185 degree sender. The problem is that the load from these fans causes idle speed to drop about 300 rpm. If I get my 'fans off' idle speed and mixture where I want it, the engine will stall when the fans start. This is a carbureted engine and I really don't want to add complexity with any type of IAC solenoid or PWM fan controller. I am considering either wiring 1 fan to key on ignition (always on) and then having the other fan come on at 185 degrees via the sender. Or, I could run 2 senders and stagger the fans to 185 and 195 degrees, but I think I would still have to run a higher 'all fans off' idle speed. Thoughts?