DanPrixGTP
Moderator
I honestly wouldn't even worry about IAT temperatures.
Mine are usually 15-20 degrees above ambient temperature with home-made FWI while driving but even higher when with stop and go driving / idling.
When dropping pulley sizes, every car reacts different. I'd suggest putting in some new AL605 copper plugs, new wires, 180* thermostat, coolant flush if you haven't done that yet (Or if it needs it), and even a new fuel filter to be on the safe side. Hopefully you have some kind of scanner, such as an Aeroforce. When dropping to the 3.6, scan for KR and see what that car does. IAT temps wouldn't be my main concern, at all.
Mine are usually 15-20 degrees above ambient temperature with home-made FWI while driving but even higher when with stop and go driving / idling.
When dropping pulley sizes, every car reacts different. I'd suggest putting in some new AL605 copper plugs, new wires, 180* thermostat, coolant flush if you haven't done that yet (Or if it needs it), and even a new fuel filter to be on the safe side. Hopefully you have some kind of scanner, such as an Aeroforce. When dropping to the 3.6, scan for KR and see what that car does. IAT temps wouldn't be my main concern, at all.