geonc
SPIDER BAIT
Seeing that summer is once again beating us with what appears to be a another record in high temps---we are going to triple digits this weekend 
And seeing a renewed interest in electric fans on the forums, I thought it appropriate to update you guys on my systems performance
Yesterday was 93 deg with brutal humidity and I had to run a couple counties over towing 4 k on a trailer--not a huge load by any stretch but loaded none the less...
hit I-40 about 4:30 pm and locked the cruise at 70 with the air on MAX and let her eat.
I have just recently put "newer" tires on and gone up to 315/75/16 Pro Comp AT [still on stock fact alloys BTW] and the operating conditions for the 300,251 miles on engine and 4.10 LS gearing and 203 t/stat were as follows....
Road speed 70 mph at 2650 turns and coolant was 210 to 215 deg and would naturally climb when I hit a long grade or over pass, then settle back.
Well...seeings that I had a good opportunity for a test, when the temp gauge rose above 215 deg I would switch on the fans--both on high speed.
Well...at 70 and even 75 mph those fans actually brought the temp back down to 210 degrees
So the thought that electric are useless at highway speeds is proven wrong...at least at this load and conditions.
But as I stated in my orig build....this design probably will not work for those hauling max GVW on a reg basis...but appears to be a possible solution to those who tow reasonable weights occasionally and want to try running electric fans
My only real concern was my tranny temp...after 80 miles it was at 210 deg---the hottest I have ever seen it...altho I have heard the ZF's tend to run hot 
And seeing a renewed interest in electric fans on the forums, I thought it appropriate to update you guys on my systems performance
Yesterday was 93 deg with brutal humidity and I had to run a couple counties over towing 4 k on a trailer--not a huge load by any stretch but loaded none the less...
hit I-40 about 4:30 pm and locked the cruise at 70 with the air on MAX and let her eat.
I have just recently put "newer" tires on and gone up to 315/75/16 Pro Comp AT [still on stock fact alloys BTW
] and the operating conditions for the 300,251 miles on engine and 4.10 LS gearing and 203 t/stat were as follows....Road speed 70 mph at 2650 turns and coolant was 210 to 215 deg and would naturally climb when I hit a long grade or over pass, then settle back.
Well...seeings that I had a good opportunity for a test, when the temp gauge rose above 215 deg I would switch on the fans--both on high speed.
Well...at 70 and even 75 mph those fans actually brought the temp back down to 210 degrees
So the thought that electric are useless at highway speeds is proven wrong...at least at this load and conditions.
But as I stated in my orig build....this design probably will not work for those hauling max GVW on a reg basis...but appears to be a possible solution to those who tow reasonable weights occasionally and want to try running electric fans
My only real concern was my tranny temp...after 80 miles it was at 210 deg---the hottest I have ever seen it
...altho I have heard the ZF's tend to run hot 
