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  #1  
Old 03-14-2012, 09:37 PM
seltzer seltzer is offline
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Default 4.7 has electric fan and mechanical fan?

Huh...who knew?

I had the AC on today, basically to make sure it works since I bought my truck in the dead of winter. I was not aware these had electric fans, I am assuming only for the air conditioning.
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Old 03-14-2012, 09:42 PM
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That's correct. The electric fan will operate when the AC compressor is on, and also when the coolant temperature reaches 222 deg F (this really shouldn't happen ever...it's just overheating protection programming).

I (and others) have removed the mechanical clutch fan and are using superchips or diablo sport tuners to adjust the electric fan to come on at a lower temperature. I (and others) am using a 180 deg F tstat and this helps cooling even more. I've had no issues since I've been running without the mechanical fan, operating temps have actually been about 10 deg lower (since the lower temp tstat).

Just an FYI...

Also, the hemi's have both fans as well.
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Old 03-14-2012, 09:58 PM
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Good to know, that may just be a future mod!
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Old 03-14-2012, 09:59 PM
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Yeah I like it better, feels better, but just FYI I ran at the 1/4 mile before and after and ran within 1/10 both times, probably due to temperature....
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