mapper Posted February 25, 2015 Report Share Posted February 25, 2015 I wondering a few things arount IAT correction. The help file before firmware 5.2 says, that the recommendet IAT location is just before the throttle. From 5.2 on, the suggested position is after the throttle body. Especially with the use of the the charge temperature estimation equation modelle, I can't comprehend why placing the IAT sensor after the throttle should be better? As the most know, heat soak on long idle periods are the biggest problem with IAT sensor placed there. With the fuel equation calculation, we can bias the calculation more to engine side if the IAT are getting to less hot if we placed it before the throttle. In the case of fittment in the intake manifold the IAT sensor getts often to hot (heat soaked) and to much fuel is removed. Biasing the charge modell in the direction of ET will make it even worse.Â The other question is: what percentage correction does the new modelled fuel equation use? Â 2%, 2.5%, 3.5% per 10degree change? I'm wondering, because in theorie (ideal gas law) the densitiy will change ~3.5% per 10 degree temperatur change. But all LINK base maps has only 2% on the IAT correction map. Are there a good explanation for this phenomen? I personally had good results with 2 to 2.5% correction and placing the IAT Sensor just before the throttle body.Â Quote Link to comment Share on other sites More sharing options...
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