07-11-2016, 07:17 PM
On high speed, your fan would typically use 50 to 60 hp. At low speed probably only 30 or 40. The ecm should read engine perimeter's and adjust fan speed accordingly. You need all the hp you have with a big trailer going uphill. On the flats, low speed is better because you are not using the extra hp just to run the fan on high when temps do not require it, saving fuel, and giving up the extra 20 or 30 hp if you need it.
2003 foretravel designer series. previous 2000 foretravel 34 ft, isc 350, 1995 45 ft Newell coach 385, Foretravel [2], 4106, 4905, wayne bus, wanderlodge fc, gmc motorhome.
toads: 2011 honda fit sport, Yamaha Zuma 125, Suzuki tu250.
daily drivers: boxster and cayenne