81X11,
You towed this after changing over to dual electric fans, correct. How warm was it out, how much does your rig weigh and how warm did your engine get compared to when you had the mechanical fan?
I have a 19' Glastron SX-195 w/ Chev 305, rig is 3200-3400 lbs. loaded with gas ife preservers, etc. Towed two weekends ago here in Western PA 22 miles each way to a reservoir with 95 RMW. I bet I didn't get 10 mpg instead of 14.8 not towing in the hills here.
I bought a 1998 Lincoln Mark VIII 18" electric fan and shroud to install nex spring in the mechanical fan shroud. Lots of work but should provide more cooling than the factory primary fan. I also am considering seeing if the 9 blade fan from 2006 and newer Chevy pick-ups will work with the primary fan motor or the secondary fan motor.
I put a Flex-a-lite 295 dual fan in both my old 2000 Dodge Dak and have had one in and out of my 2006 Trailblazer Ext with 5.3 liter V8. Work better than the Mechanical fans towing my 4,700 lb. Travel trailer, even in 90+ F heat.
Chris