Car Radiator Fan Amperage

A centrifugal valve opens to allow the flow of heavy silicone fluid locking the fan blades to the pulley.

Car radiator fan amperage.

At idle and low engine speeds this fan clutch is fully engaged gradually disengaging as engine speed increases. Mechanical fans only cool as much as they can based on the engine speed but electric fans draw the maximum cfm at idle because they operate independently of engine rpm. The one drawback to adding more electrical components to your vehicle is that often times the original alternator was not designed to handle current draws over 45 60 amps so as you add a single or dual electric cooling fan consideration should be made to increase the output of your charging system with a beefier alternator. Amperage used to measure how much load an electrical device draws when in operation.

If you ve got an electric cooling fan on your classic car or hot rod and you want to know how to wire it with a relay you ve come to the right place. The initial start up of the fan will have an amperage spike of up to 60 percent which lasts only a millisecond. My intrepid fans pulled right at 10 amps while running. Using a 30 amp fuse.

See all 8 photos. If you plan to upgrade your engine it won t hurt to install a more powerful fan now you can control its airflow with a temperature sending unit. Depending on the application it may freewheel above 2 500 to 3 000 rpm. Automotive fans are rated at 13 5 volts and the rating is after the motor is at operating rpm.

Motor power determines the amount of cubic feet per minute cfm of air a fan delivers.