Yes, heat management is and always was a concern of mine. To further explain, the turbocharger was ceramic coated and THEN wrapped in a turbo heat blanket. Add to this the aforementioned heat shield installed over the ac line and the ABS module that are next to each other. Things are pretty well protected.
As for the system taking heat, it used to blow 38 degrees F in Miami after some work I did on the system with the help of this very forum 5.5 years ago. It had a leak at the expansion valve, so I went ahead and replaced that, the orings, the dryer, schrader and some other orings and put it back together. It was great until now. Tho you bring up good points, I can further insulate the lines with some heat wrap.
Tom, by pressure switch I mean the factory switch which I suppose is to protect the compressor. It is indeed an expansion valve setup, as factory. I know it's working because the compressor clutch wouldn't engage recently due to low refrigerant charge. It did run when I jumped it. It also cuts out at a high psi as well.
The turbo setup is a totally custom modification so there are no factory available lines with an alternate low port location.
I know locally there are machine shops that will make you custom ac hoses if you bring them your old ones to use as templates/harvest ends. Perhaps if I bring them my rubber hose suction line they could crimp a port in the center? I think this would be the easiest way to do this.
OR, take them the hard line with the issue, have them remove/weld up the existing port (to curb any heat related schrader failures) and weld in a new port in a better place. Problem with this is that hard line is LONG and snakes thru many places... would be a huge undertaking to remove/install and not break.
This ebay listing shows the line with the original port in it. The one I want to change. It points straight into the engine bay from its frame rail location on the way back to the firewall. I'll assume this link is okay as I'm not buying anything, it's just to show what my lines look like.http://www.ebay.com/itm/Lexus-TOYOTA-OE ... F4&vxp=mtr
And this is how the lines are routed in the car. The low port is on the hard line near where the EPR is labeled.
Thanks, fellas. I will ask around locally to see what I can have done.