Heatsoak, lots of different definitions it seems

[speedsix]

I thought it was the inlet air temp sensor physically getting hot (car idling/in traffic) and the ecu thinking the air is hotter than it really is?

Or is heatsoak a hot inlet heating up the air as it passes through?

An efficient intercooler will lower the charge temps but not really counter heatsoak, correct?

 

[ibizacupra]

I thought it was the inlet air temp sensor physically getting hot (car idling/in traffic) and the ecu thinking the air is hotter than it really is?

Or is heatsoak a hot inlet heating up the air as it passes through?

An efficient intercooler will lower the charge temps but not really counter heatsoak, correct?

both....

low speed running can heatsoak the inlet manifold from conducted heat off the motor and no real airflow thru the manifold.. and as the ait temp sensor sits inside this oven it will think the air is hot... damned hot! (phenolic insulator gasket combats this... bargain at £59inc vat-plug )

open up the throttle and you will immediately see cooler air pass the sensor and the temp sensor now starts to see charge temps.. close throttle, and again the hot oven of an inlet manifold prevails and its all apparently hot again.

sustained load.. giving it pasty, high boost and too small an intercooler and the initially cooler air under open throttle now starts to climb also and again this will be measured by the AIT sensor. Recovery of the system is then a factor of intercooler.. is it a good heat exchanger or good heat sink.. the former recovers fast, the latter does'nt.

does this help?

 

[speedsix]

Yes thanks Bill.

I feel a technical intercooler question coming on but I will save that for later