Very interesting. I’m gonna have to look at my 2038R but I think it does draw air from the front screen area.
The manifold temperature sensor you are referring to is not a good value. The reason is that sensor is including EGR gases into the equation which the EGR opening percentage is variable, so it would be near impossible to get an accurate reading due to the variability of the EGR valve. You would need a separate sensor on the CAC output to see the air temperature input. In the end there should be a realized reduction in manifold temperature as the air temperature going into the turbo is reduced with everything else staying the same.Very interesting, indeed.
Have you done a study of the before/after affect of this modification on Manifold Air Temperature? The Engine Control Unit (ECU) monitors manifold air temperature (parameter ECU-031) which is displayed on your tractor on the ECU diagnostics display.
Ultimately, the end goal would be a reduction in manifold air temperature since this is the air that is directly ingested by the engine.
There is "no free ride" in modifications of this type, and it would be good to know if the negative impacts of adding an intake air restriction and partially blocking the charge air cooler heat exchanger with the large added intake hose are positively contributing to the bottom line where it matters with reduced manifold air temperature.
While the intake adapter does take a strange route around the radiator cap, there aren't any additional restrictions. It maintains the same cross-sectional area as the hole in the firewall throughout it's length.
Sorry, but it just wishful thinking to state that the intake restriction (pressure drop across intake piping) does not increase with pipe length, even when the pipe diameter remains the same.There is no intake restriction as the diameter of the adapter and hose is the same as the existing opening of the firewall.
This equation even suggest that cross section should be smaller when length increases to maintain Bernoulli principle. Intake pressure is important for NA engines but when turbocharger is used I believe it is much less important.Sorry, but it just wishful thinking to state that the intake restriction (pressure drop across intake piping) does not increase with pipe length, even when the pipe diameter remains the same.
As shown in this equation, as the pipe length (L) increases, even while maintaining a constant pipe diameter (D), the pressure drop (resistance) will also increase with increasing pipe length.
Creating an intake pressure drop reduces intake air pressure (and air density), which is to some degree counterproductive.
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It would be really interesting to see some measured effect of this mod. If you do not have access to PTO dyno I would suggest cruder method. Find some constant engine load e.g. pulling a heavy trailer, soil engaging work and monitor engine load in the tractorplus app. I would be really interested if this temperature drop has any real effect. I would definitely remove it during winter months though.Are we letting perfect (zero pressure drop) be the enemy of good (reduced intake temps) here?