murdr

The tune gives you more power! so the engine in theory should have to work LESS!

Laramieskibum

if you read the rest of the thread than you saw that a good chunk or most of us are not modded.

papa tiger

A quality radiater shop can do what u need. Be it cool coolant or trans. Be sure both ur fans spin up. U may need pcm looked at.

isthatahemi

A tune makes more power by working every applicable component harder. That generates more heat.....

5.0GN tow

I guess this is one thing that has concerned about the ecoboost all along, turbos generate heat and towing loads in full boost makes it even worse. Makes me happy I have a 5.0. I pull at max rating up hills a lot with my 5.0 and no real rise in Temps.

That aside this is clearly a case of more cooling needed and I agree with most here that bigger IC and larger aftermarket radiator would work, but actually I think you will be better served by getting a transmission cooler that is separate from the radiator. Cooling the fluid in its own radiator so to speak takes away a huge heat sink the main radiator has to help cool..

lucky644

Id like to see the temps of a 3.5 and a 5.0 doing a long pull with the same load up the same hill. I'm curious of the difference.

papa tiger

Thing is the 5L will loose 70/100 lb ft of torque on a mountain pass = to a lot less heat where the 3.5L keeps on generating = to maybe 3.5 MPG.

5.0GN tow

Good point. My towing has all been in the east in the blue Ridge and Appalachian mountains which is not the same as out west so altitude is not as much a problem. The grades are still pretty long and steep many 5% or more and running in hot humid conditions where it's hard to cool an engine. Not saying an eco won't pull more just a 5.0 is easier to cool.

SkiSmuggs

In 12,500 miles of towing my 9500 lb fiver and with a tow tune, I only had the temperature go above center once and that was a several mile pull up a mountain in Wyoming. I dropped my speed from 62 to 55 and the temps dropped back to normal. I do have a Wagner CAC.

c-one

I would agree that the Wagner IC is the way to go.