Reading your real charge temperatures..

There seems to be much confusion over the difference between what 'charge temperatures' are versus 'inlet temperatures' mean and the simplest explaination is that when you log these PIDs on Forscan, ACTC relates to temperatures seen at the MAF sensor, and IATC are temperatures seen post intercooler in the TIP sensor located in the coldside pipe.

Don't believe this? It's easy to prove, with attached screenshots of datalogs from 2 cars. One of these is a VUDU 1+ car using a stock airbox and stock intercooler, and the other is my own VT330R car running an Airtec open cone induction with heat shield and Airtec Stage 3 Intercooler.

Stock turbo Stage 1 OEM hardware 

VT330R with Airtec Stage 3 Intercooler and Airtec induction kit & heat shield 

You should always log outside temperature as well as a reference point, information like ' my charge temps were only 25c' is irrelevant information without knowing the ambient, it has to be in context, if the ambient temp is 20c and you see a 5c rise across a 4th gear pull to the redline, that's exceptional (and this assumes a hybrid, as charge temps differ depending on the turbo you using, even before you factor in the efficiency of your intercooler)

Logging should always use a set formula for direct comparison between cars, so my default would be starting my pull from 1800rpm to around 6500rpm on a stock turbo car, and even higher on a hybrid stage 3, which can exceed 7000 rpm in many cases.

I'll try also to make sure the calculated EGT starts at around 700c.

From the graphs, you can see just how hot a stock intercooler can get, and with each further pull, the peak temperature would be higher each time.

On a VT330R, and many similar Stage 3 cars with a decent intercooler, it's fairly typical to see a 10-12c rise across the pull.

In colder conditions, it goes without saying the intercooler will perform better as the rate of heat transfer is higher across the core externally.

This is a subject that I've only breezed over here, what matters is knowing what the data means, I'm seeing too many posts on social media where people are claiming their charge temperatures barely rise above ambient, even on track 😆 it helps you are actually logging the correct sensor in the first place.