Quote:
Originally Posted by GH85Carrera
I understand many of you want to DYI the AC upgrade parts.
I was not willing to invent the wheel. Griffith's stuff works, and has been perfects for over a decade, and many long road trips.
With no hesitation I will state his Mr. Cool upgrade was the single best project I ever did to my 911.
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Agreed. Living in the South, Griff’s A/C makes the car year-round drivable.
Getting Griff’s Hurricane fan and modifying the evaporator top for the late 80s cars is the way to go. Made a big difference as I didn’t initially do this.
Also, my installer made one error that took me some time to figure out. The temperature sensing probe that gets buried in the core must be away from the edges or it doesn’t sense the deep core temperature. Mine was near the edge, thus warmer than the core, so the compressor never turned off resulting in the freezing of the core. My a/c would be very cold, high 20s, but after about 20 minutes it would start blowing warm air as the core turned into ice. I would have to turn the a/c off and let the ice melt before turning it back on. Once I discovered the probe had been incorrectly installed, I never had an issue again and have consistent vent temps in the low 30s.
Good Luck!