Both 6-volt and 12-volt electric radiator cooling fans are available. Also most important check to see how the fan motor is made. Most are made using bushing motors which are less efficent and draw more current. By contrast a ball bearing motor will draw less current and have a much longer service life. They do cost more to manf but like most things you get what you pay for.... The fan motors I use to build fans with are ball bearing motors and draw five amps at 2587 rpms. A bushing motor will typically draw about twice that. In the case of 6 volt it makes quite a difference how efficent things are. A 30 amp toggle switch and inline fuse are included along with real mounting brackets to mount the fan to the radiator instead of the wire ties that will wear a hole in your core.
If the fan motor is efficent you can run a cooling fan with a generator, I have for going on 20 years, we do it on the Great Race cars every year. WE also do not use a relay but instead use a heavy 30 amp toggle switch. Over the years I have learned to believe in the kiss principle....
You can read more in the tech tips page at fifthaveinternetgarage.com Thanks Randy
