Quote:
Originally posted by kuehl
What I find interesting is the delta (air inlet vs. outlet) you had 1k rpms. I'm wondering what would throw off the curve here helter skelter? Maybe you caught the temp measurement while the expansion valve was hunting for a second or two?
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Griff
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On my 89, vent temp drops 2 or 3 degrees when I go to idle after typical road speeds, at least for a minute or so. I had assumed that it was because the evaporator fan slows a few RPM due to voltage sag from the alternator at idle.
[As yet another data point for guys with cars from my era, I am getting vent temps as low as 39F (fan position III) on mid-eighties days with a stock system, R12 topped off until to top of sight glass and then maybe 2 oz more. I just cleaned both condensors (Simple Green) and got another 3 degrees (from 42 to 39).]