So I think I finally jumped the shark going after more A/C efficiency... lol... I thought I'd seal the condenser against the radiator support to ensure the fan only pulls air through the condenser and not around it, thinking I'd improve the heat transfer off the condenser. Ironically I didn't really notice any improvement in efficiency (actually not surprised given I already have ~37-38F air out the vents), but what I did get is a huge increase in engine coolant temperature. It was about low 90's today and I took the car into work. On the way back, the coolant got well over 200F while in traffic. Typically on a day like this, it'd stay between 180 and 190F. Without that seal, what was probably happening was the fan pulling through the radiator a mixture of air pre-heated by the condenser as well as ambient temperature air going around the condenser. With the seal, the radiator was exclusively getting preheated air off the condenser. Coolant temp actually bounced off 210F. I'm going to add that seal between hood and radiator support per my other thread (since its a factory item), but at this point I think it's time to leave the A/C setup alone.