2006 OutBean, 2005 LGTW
That's a curious thought. I have gauges but I don't know what I'm doing with them. I'll put in some effort to figuring it out though.That tiny heater core is also not near a heat soaked engine, already at 200*F, as well as getting ambient air blowing through it. One thing this sort of brings up, is your A/C over charged? I wonder if your system is over charged creating extra drag/pressure on the pump as well as making the condenser more hot then it needs to be, causing more hot air to run over the radiator. Although I havnt seen over charged ac systems cause a problem before(Lived in Phoenix, was super common to over charge systems so passengers could actually be cool in 120*F weather).