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Idle at 2000 rpm can generate around 15" of manifold vacuum and
that converts to 45 deg F temperature drop. That is waaaaaaay more than
the dew point spread in most places. A lot of the heat (and therefore temp
drop) gets absorbed by the warm environment, but not all. It is the same
phenomenon that causes carb ice. Just a theory .... Jim S.
I've seen the same
condensation on my intake when running at low power on the ground. Now
that you mention it, I realize that my air temp sensor is not in the best
location. I have it in the pressurized air box on the outside of the
throttle body. As I understand it, the pressure drop, and temp change will
be on the engine side of the throttle body. Since this can change the temp
quite a bit, I bet that's why I have such a difference between the A and B
controller (B doesn't use the air temp sensor) at low power on the ground.
Where are you guys
putting your air temp sensors?
Cheers,
Rusty (new oil cooler
arriving today)
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