ACT Temps

[Crapblaster]

When checking my air charge Temps, it seems the rear shutters on the Intercooler don't do much. Sitting at a red light it will go to about 125-130 degrees. Radiator fans are running. Start moving away from the stoplight and the temps start dropping almost immediately to about 110 degrees. Anyone else ever check theirs?

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[stuartmunto]

Wouldn’t the Air charge temps be more related to intercooler heat?

 

[Crapblaster]

Wouldn’t the Air charge temps be more related to intercooler heat?

Yes, the radiator fans pull air through the shutter shroud on the back of the intercooler.

 

[Blue_Raptor]

There's a lot that goes into it. Whether the engine is in vacuum or boost makes a difference. You can be on the freeway and just let off the throttle putting the engine in full vacuum and the temp will go up. And while moving, I don't think anyone* has a full understanding of exactly when the front shutters are open vs closed and how much the seemingly high temps are due to somewhat ineffective stock IC vs the front shutters being closed.

*there are probably some people (outside Ford) who have full understanding of exactly what different scenarios have the shutters open and closed, but I have never been able to find a good breakdown

 

[Goosetuned]

When checking my Intake air Temps, it seems the rear shutters on the Intercooler don't do much. Sitting at a red light it will go to about 125-130 degrees. Radiator fans are running. Start moving away from the stoplight and the temps start dropping almost immediately to about 110 degrees. Anyone else ever check theirs?

This is normal.

If the intake is sucking in hot air from the engine bay at a stoplight, the charge temps won't be down much since air isn't passing through the air to air exchanger.

 

[Crapblaster]

Sorry everyone,
I meant Air Charge Temperature not Intake air Temperature. Intake air temps would rise sitting still and no air movement. Charge air should benefit from fans pulling air through the intercooler. F150 Raptors come with fans attached to the intercooler.

 

[Cosmicjumperalex03]

The intake air temp reading is prior to the intercooler, its measured right after the air box before it goes into the turbo.

 

[pablo94sc]

Sorry everyone,
I meant Air Charge Temperature not Intake air Temperature. Intake air temps would rise sitting still and no air movement. Charge air should benefit from fans pulling air through the intercooler. F150 Raptors come with fans attached to the intercooler.

You will never see much air move through the intercooler core by the radiator fan on our truck. Air acts as a fluid, so it's always going to take the path of least resistance unless forced. The radiator fan can't move the type of air a moving vehicle can, so the air it draws mostly goes around the IC at idle and low speeds, before being pulled through the radiator core.

You hit on a good question. Should those of us who do a lot of slow speed trails consider adding an intercooler fan to our truck? I'm going to say yes. An IC fan kept core temps down on my Tbird while idling in the staging lanes between passes, keeping heat soak at bay. I don't see how it couldn't benefit our trucks as well, but I have no idea if any of the current IC options leave enough room for a fan(s).

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