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Originally Posted by chrisbalich
it idles ~1100. So it moves a bit more air than idling at 900.
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930 has a bigger fan than the 3.0, I believe? My high CHTs when idling were recorded in high ambients; as relatively ineffective as my heat exchangers are at 14F, the flappers would most certainly be closed at 80+F...
I've always set the idle to 1050 when hot. It seems much happier there with SC cams.
Quote:
Originally Posted by chrisbalich
Thanks for the data points. That's a big help.
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You're welcome!
Quote:
Originally Posted by chrisbalich
As my own data point, with the CHT sensor where I've placed it, I've never seen CHT temps above 75C. Not with idling, beating on it, or highway cruising.
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That does seem odd.
Perhaps double-check the calibration for the sensor? Despite both being NTC thermistors, the Magneti Marelli and Bosch sensors have very different curves. To the point that I deemed them non-interchangeable (and markedly so <100C) when trying to avoid a 400% markup over the generic...
I believe all Bosch NTC sensors are the same composition/provide the same curve, certainly all the ones I've compared the datasheets for are.. I'd also strongly suspect the 993 sensor would be Bosch
As Jonny suggested, some thermal paste between the fins/sensor - and maybe a few drops of oil/AT fluid in the housing - to improve thermal connectivity?