Overheating after SVC intercooler?

[smurfslayer]

So this does seem to make sense because at least 2 things are happening.
1) the airflow to the radiator is obstructed; lower flow or CFM.
2) The air that is making it to the radiator is now hotter than ambient.

Does anyone know the exit air temp from the CAC? I’d bet it would be pretty high under load so instead of the radiator getting, say 95-105 degree air, it could be getting 130-140 degree air and less of it.

I’m guessing on the exit air temp from the CAC but it’s not ambient or below for sure.

 

[Gaptor]

It’s a double lose as you heat up your IC, and you don’t allow air to hit your radiator your coolant is boiling In there.

these were fears when considering different intercooler options

 

[nikhsub1]

First of all, all FMICs for this truck are nowhere near 3.5 inches thick. The IC that I have which is full race, the fin density is not very dense - this is a good thing for airflow through the unit. The air out of the IC is not nearly as hot as you guys think. Like I've said before in this thread and other places stacking heat exchangers is not as detrimental as a lot of you think, many OEMs do this from the factory with no issue. Also, another point I will make is that thickness is probably the least important dimension of the intercooler. Meaning thicker is not better than being TALLER. Overall surface area does matter but if you think in terms of efficiency, the intercooler is THE MOST EFFICIENT when the temp differential is the greatest. When is this? Well I'll tell you! It's the MOMENT the hot air enters the IC. As the hot air moves across the IC, the IC becomes less and less efficient. Why? Because the IC is cooling the air, as the air is cooled in the IC that temp differential drops. Conversely, at the EXIT of the intercooler, the intercooler is the LEAST efficient.

Why did I just explain this shit? Well, if you now take that into context you will see why the FMIC is far more efficient that an OEM replacement. Why? Well, it goes back to efficiency and surface area. If you mark off the FIRST INCH of the fins of your IC, and multiply that by the HEIGHT of the intercooler you will get a number - the higher the number the better. Why? That is the AREA that is most efficient since it is at the inlet of the intercooler. All things being equal, with side inlets on the intercooler (like our intercooler) height is the more important dimension than thickness or width.

 

[GCATX]

Isn't this skid plate blocking a lot of air flow, where a stock opening used to be. Maybe try and give a go without it in place, if possible?

 

[Deleted member 17706]

Isn't this skid plate blocking a lot of air flow, where a stock opening used to be. Maybe try and give a go without it in place, if possible?
View attachment 145833

The vent openings above the winch are open and allow airflow. But it doesn’t really matter because the airflow through those vents will not go up into the radiator.

 

[GCATX]

The vent openings above the winch are open and allow airflow. But it doesn’t really matter because the airflow through those vents will not go up into the radiator.

At the expense of showing my ignorance on the subject, what is behind the vents where the license plate goes then? On mine, I can clearly see a something back there that is a radiator or cooler of some type, the original poster has all but blocked off now.

 

[smurfslayer]

The air out of the IC is not nearly as hot as you guys think. Like I've said before in this thread and other places stacking heat exchangers is not as detrimental as a lot of you think, many OEMs do this from the factory with no issue.

ok, how hot is it?

 

[nikhsub1]

At the expense of showing my ignorance on the subject, what is behind the vents where the license plate goes then? On mine, I can clearly see a something back there that is a radiator or cooler of some type, the original poster has all but blocked off now.
View attachment 145834

That is where the OEM intercooler is, blocked airflow by the license plate. Ford really nerfed that big time.

 

[nikhsub1]

ok, how hot is it?

I don't have a specific for you but it is much cooler than the heat the AC condenser puts out.

 

[Deleted member 17706]

At the expense of showing my ignorance on the subject, what is behind the vents where the license plate goes then? On mine, I can clearly see a something back there that is a radiator or cooler of some type, the original poster has all but blocked off now.
View attachment 145834

What you are seeing behind your license plate is your stock IC and shutters. Once you move to a FMIC, the stock IC and shutters are removed. So when air passes through the vents above the OP winch, the air will keep moving to what is behind the stock IC and shutters—the air will not curve up and go into the FMIC and radiator.

As @nikhsub1 noted, your license plate is restricting a lot of air flow to your IC. Given that you are in Texas, I imagine your truck battles heat soaking regularly and is not running near its full potential. Do you run premium gas?