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Tkmadone · 05-27-2010, 06:23 PM

Fitz has it nailed. In fact when the fans kick on the idle in my truck drops about 150rpm due to the increased load on the alternator.

I built my own fuel injection system for my MGB and because of the data logging I could derive HP and torque so I could have my own personal dyno. This was very useful for tuning. I took a reading before removing my engine driven fan and one after and the total loss was 9hp. You don't really see the loss before 3000rpm but it is always there.

I am an aeronautical engineer for Aerovironment that likes trucks!

05-27-2010, 06:23 PM	#8
Tkmadone Registered User Join Date: Aug 2009 Location: Simi Valley, CA Posts: 193	Re: HP gain with electric fan and water pump Fitz has it nailed. In fact when the fans kick on the idle in my truck drops about 150rpm due to the increased load on the alternator. I built my own fuel injection system for my MGB and because of the data logging I could derive HP and torque so I could have my own personal dyno. This was very useful for tuning. I took a reading before removing my engine driven fan and one after and the total loss was 9hp. You don't really see the loss before 3000rpm but it is always there. I am an aeronautical engineer for Aerovironment that likes trucks!