Toymods Car Club Inc: Tech & Conversions => factory locations of air temp sensors

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ke382TG
Forums Junkie

Registered:
May 2002

Re: factory locations of air temp sensors

Wed, 22 September 2004 05:39

Quote: Cool1

You say the sensor is suffering from heat soak, but wouldn't the plenum be suffering from heat soak as well? So having the sensor measuring the temperature in the plenum is a good idea

I thought this too and it is correct, but my real issue was not when the car was being driven (I had no real problem with temps being elevated by heatsoak when driving) but after it had been driven and was left sitting for say 30 minutes or less and the sensor in the manifold (and everything else in the engine bay) had suffered from heat soak.

When I started it after this short period of rest the air temp sensor would see temps up to around +50 degrees celsius. It would take around 10 min of driving before it would return to the right temps.

By moving the temp sensor to the inlet pipe (between IC and throttle body) it suffers a lesser amount of heatsoak and because it is a light alloy tubing (cools nice and quick once the car starts), and because it has silicon hose at each end (which acts as an insulator and decreases the rate of conductive heat transfer from the inlet manifold to the pipe in which the sensor is mounted) the sensor does not see temps as high as it did when mounted in the manifold (when left to sit of course).

So in summary, by moving the sensor only about 250mm I get less temperature fluctuations due to heat soak and better idle immediately after a hot start up. Air fuel ratios are good so I am quite happy with the setup Very Happy

[Updated on: Wed, 22 September 2004 05:42]

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