Originally Posted By: Cujet
Originally Posted By: Blaze
There is zero chance of sucking in dust, right? The inter-cooler would always be blowing OUT? Is this right?
I would not make the claim that there is absolutely, positively zero chance of sucking in a grain of dust through that tiny hole. However, as a general rule, there is positive pressure inside the intercooler so much of the time, it can be considered "all the time" .
Consider that the F150 is an automatic, so there is no lift throttle between shifts as there might be with a manual transmission. And consider that Ford programmed the ECU-Throttle By Wire to hold RPM at 1500 during deceleration to keep the catalytic converters hot. So even during lift throttle + braking, the engine is powering the wheels a bit.
With that in mind, there is little chance something will be drawn into a 1/16th inch hole.
Is the intercooler before the throttle body? If so, it will not run under conditions of high vacuum. Of course, it's downstream of the air filter, so some vacuum is inevitable, but only mildly so.