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Partial guess Posted by Ari [Email] ![]() ![]() In Reply to: Thanks! That's the one. Hey, anyone know..., kyle morley, Fri, 8 Apr 2005 07:13:08 Members do not see ads below this line. - Help Keep This Site Online - Signup |
My guess on the 1 or 2 is series - 1 is the early aluminum, 2 is the later plastic. Not sure about the 4.7 or 6.4, but WOT is usually around 5 volts, so I wonder if the 4.7 or 6.4 indicates a full scale voltage. But that's only a guess.
I know that the 100, 120, and 155 is the nominal wire temp. The AMM works by heating the wire to a specific temperature by passing a current through it, and then maintaining that temperature and measuring how the current changes to keep that temp. As the air mass flow increases, it pulls more heat away from the wire, so the current has to increase to maintain the temperature.
Running the wire at higher temperatures allows better measurement of airflow. I think that the temp the wire runs at doesn't really impact the signal scaling to the ECU.
posted by 192.249....
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