View Single Post
Old 06-26-2008, 10:40 PM   #4 (permalink)
EcoModding Apprentice
Join Date: May 2008
Location: South Dakota
Posts: 117

GMC Sonoma - '94 GMC Sonoma
90 day: 36.97 mpg (US)
Thanks: 0
Thanked 4 Times in 4 Posts
Originally Posted by LostCause View Post

* Your electric fan gets its energy via the alternator. The 0.11HP it consumes is magnified by whatever your electric system efficiency is (i.e. 0.11HP may actually be 0.15HP).
But in my case, the electric fan is almost using no power as I mentioned. This is because it almost never comes on. In fact, I drove around with no fan at all for three days before I got the electric fan installed and the temp gage never rose above its normal range.

I drive about 10,000 miles/year and I calculated, using my 0.11 HP figure, that it will increase my mileage by 0.33 mpg and thus take 6.6 years to pay for itself @ $4/gal and the 33 mpg that I get. The fan w/T-stat cost $80.

I guess I would not have done this mod had I done this calculating before buying the new fan, but that's water under the bridge now.

Anyway, thanks for the input.
  Reply With Quote