Last night, and today, I did some testing with 2 different intake kits and found some remarkable results:
The factory setup without the fender silencer caused the IAT sensor to registered nearly 160 degrees after just driving in low speed traffic, and sitting at idle for only a few minutes. With the fender silencer the temps still reached an unrealistically 140 to 150 degrees.
Ambient air temp was 82 degrees! Cruising on the freeway allowed the temps to reach the low to upper 90's depending on the speed (55 up to 85), with the higher speeds causing the lower temp readings.
Next up was the homemade inner fender kit with a 12" conical filter produced temps that were near ambient at all conditions, save for low speed driving and idling on heat-soaked pavement, but even then the temps never went over 110 degrees. The moment movement began the IAT temps went almost immediately to ambient.
Now, some of you will say this data means squat on the racetrack, but in reality it means a LOT! Sitting in the pits, doing your burnout, etc., with the factory setup with or without the fender silencer caused the temps to skyrocket yet again. With the fender kit the temps stayed at or not much higher above ambient (same circumstance with this setup as regular stop/go traffic as I described above).
I know most of you realize this, but did you know that these extreme temperature readings on the IAT causes the pcm to reduce your overal timing, thus lowering your cars performance? Ever notice how sluggish your car feels after driving it around in traffic, or at low speeds?
If anyone has access to an OBD-2 Scanning tool, such as the DiabloSport Hellion, or even if you know anyone with a Ford Powerstroke Predator (the diagnostics function on it will work on a Ford Gas vehicle), you can check your IAT temps at idle, low speed cruising, crawling through low speed traffic, as well as sustained freeway style cruising.
I'd like to see testing done on other underhood kits like the Amazon, Steeda, etc. kits, and if they have metal tubing or some form of plastic or composite setup.
The factory setup without the fender silencer caused the IAT sensor to registered nearly 160 degrees after just driving in low speed traffic, and sitting at idle for only a few minutes. With the fender silencer the temps still reached an unrealistically 140 to 150 degrees.
Ambient air temp was 82 degrees! Cruising on the freeway allowed the temps to reach the low to upper 90's depending on the speed (55 up to 85), with the higher speeds causing the lower temp readings.
Next up was the homemade inner fender kit with a 12" conical filter produced temps that were near ambient at all conditions, save for low speed driving and idling on heat-soaked pavement, but even then the temps never went over 110 degrees. The moment movement began the IAT temps went almost immediately to ambient.
Now, some of you will say this data means squat on the racetrack, but in reality it means a LOT! Sitting in the pits, doing your burnout, etc., with the factory setup with or without the fender silencer caused the temps to skyrocket yet again. With the fender kit the temps stayed at or not much higher above ambient (same circumstance with this setup as regular stop/go traffic as I described above).
I know most of you realize this, but did you know that these extreme temperature readings on the IAT causes the pcm to reduce your overal timing, thus lowering your cars performance? Ever notice how sluggish your car feels after driving it around in traffic, or at low speeds?
If anyone has access to an OBD-2 Scanning tool, such as the DiabloSport Hellion, or even if you know anyone with a Ford Powerstroke Predator (the diagnostics function on it will work on a Ford Gas vehicle), you can check your IAT temps at idle, low speed cruising, crawling through low speed traffic, as well as sustained freeway style cruising.
I'd like to see testing done on other underhood kits like the Amazon, Steeda, etc. kits, and if they have metal tubing or some form of plastic or composite setup.
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