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Old 09-15-2011, 01:02 PM   #60
Head2Wind
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Joined: Mar 2006
Location: NorthWet Washington
Oddometer: 2,497
No, the 5.2" fan will not fit the bracket... and for that matter the 5.2" is a VERY TIGHT FIT if at all on the right side, especially the 990 because of the EFI plug on the frame rail.


I'm not sure that running the fans almost 100% of the time is really necessary, which is most likely going to be the result of having a 160F thermo switch. Keep in mind that typically thermo switches have a ON temp (200) and a OFF temp that is ~20 degrees below the ON latch temp. So, if installing a "160F" switch, that means the radiator coolant temps would need to be at or below ~140F before it would unlatch and turn OFF the fans.... IMO, not optimal.
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