Sounds like the issues that have been discussed on here for years. The lag off the line when engine temps hit 180+ Mine did it before my UPREV and it's still an issue after, even with Fan Control Mod. I am thinking heatsoak is the issue. It never happens when Engine oil temps are under 180.
I was able to get Intake temp readings with a OBD2 reader and saw Intake temps go from 90 to 180! That's why it bogs off the line sitting at a red light for a few minutes!
aftermarket intake experience