I have more questions about this, please bear with me here... :-)
OK, our performance suffers when the intake air gets too warm. As I
understand it, the warmer the intake air temperature, the less oxygen
actually gets into our engines (because air expands as it gets warmer).
Evidently, now we can compensate somewhat with the IAT adjuster, setting the
PCM input so it thinks it's cooler than it really is. But if the problem is
that we're not getting enough air, how does fooling the PCM into thinking
we're getting more air help? Does this mean that our computer isn't doing a
good job setting the A/F ratio for maximum efficiency, or is it a question
of optimum efficiency vs. maximum power? If it's the latter, wouldn't an
aftermarket computer like the Mopar PCM or Jet chip address this?
Or is it just that the IAT gives a "false high" reading because the engine
compartment temps are higher than the actual air temp?
One final question... if our engine has a temperature "setting" where it
runs its best, why do we have an IAT at all?
Sorry for all the questions -- I'm just trying to get a handle on the
principles behind how this stuff works. :-)
Thanks,
- Alex
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