ELectric Fans on a Cummins ?
For $600 or so FLex a lite makes a fan kit for the CUmmins 5.9 Anybody using it? is there a noticable MPG gain running empty? Does it work well enough to cool the truck when loaded?
Forum Discussion
Maybe a simple exercise in engineering might help understand the issues...
12volts x 28amps = 336 watts...that is what the OP referenced as the 28 amp electric fan and guessing what he is looking at
I HP = 746 watts
My 7.4L big block needs +15 HP FOR THE UPGRADED severe duty fan clutch
15 x 746 = 11,340 watts / 12 volts = 945 amps to do the same work and that is just for the electric fan motor. How about the AC, wipers, windows, headlamps (100 watt each), AC/heater fan (dash & rear), rear window heater, stereo, ETC...ETC...how big does my alternator need to be?
Now must say the severe duty fan clutch is nothing like the standard clutch...it ROARS and see stuff off on both sides being blown when sitting still
Simple math and plug in whatever HP you wish your fan clutch to need...
There are other attributes...
Like blade efficiency....air foil, dia, RPM, even ducting
Of course losses....like the losses in converting serpentine (RPM) to electrical (12VDC), then losses in converting back to RPMs
Not to say won't work...OEMs are going more and more to electric fans....but....not for large ICEs towing HEAVY with several tons hooked up to their tail...going up an incline for how long !?!?
12volts x 28amps = 336 watts...that is what the OP referenced as the 28 amp electric fan and guessing what he is looking at
I HP = 746 watts
My 7.4L big block needs +15 HP FOR THE UPGRADED severe duty fan clutch
15 x 746 = 11,340 watts / 12 volts = 945 amps to do the same work and that is just for the electric fan motor. How about the AC, wipers, windows, headlamps (100 watt each), AC/heater fan (dash & rear), rear window heater, stereo, ETC...ETC...how big does my alternator need to be?
Now must say the severe duty fan clutch is nothing like the standard clutch...it ROARS and see stuff off on both sides being blown when sitting still
Simple math and plug in whatever HP you wish your fan clutch to need...
There are other attributes...
Like blade efficiency....air foil, dia, RPM, even ducting
Of course losses....like the losses in converting serpentine (RPM) to electrical (12VDC), then losses in converting back to RPMs
Not to say won't work...OEMs are going more and more to electric fans....but....not for large ICEs towing HEAVY with several tons hooked up to their tail...going up an incline for how long !?!?
