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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Mr Hank:
I guess the only way to tell would be to do two dyno pulls one with the fan and one without.
Thanks for the info on the fan clutch.
I am thinking no matter what type of mechanical fan you have on this vehicle it still weighs between 7-15 lbs the engine still has to swing fan at any speed even with the fan clutch not engauged. With an electric fan the engine should idle smoother and spool up faster (if you can really spool a 5 cylinder motor). This should free up some torque and hopefully some gas milage. After all none of use are really taking our h3's to the drags. </div></BLOCKQUOTE>
I'll weigh a fan on Monday morning. (The guys in the back are tearing apart a H3, piece by piece and weighing each piece separately. In fact, if they have weighed the fan, I'll just look it up on a spreadsheet.)
The engine does not turn the fan at highway speeds, the clutch disengages it from the engine, and air passing through the radiator spins it; however, it mean nothing since the fan is not necessary at these speeds to draw air through the radiator. Therefore, there is no drag on the engine at highway speeds. Low speed and at idle...yes.
I will guess 5 pounds on the plastic fan assembly.