I recall these systems held 3.75 lbs of R12. About 80-90% of this amount for R134a.

It was a miracle!

I'm looking for a 1984 Ford truck that can blow 38 degree air out of the vents with the fan on high, doors open, outside air at 100 degrees on a hot summer day.

I'm still looking for that magic Ford truck that blows 38 degree air out the vents with the fan on HI on a 100 degree day with the doors open.

My calculations say that it is impossible, so I need more information.

I know that. My point was that the individual obviously stretched the story. The only way that I could run the calculations to have 38 degree air with 120 degree air comining in at the CFM of the high blower speed was to use 30 degrees below zero as an evap core temperature, which we know can't occu...

Several years ago, I obtained the design specs from the dealer on a 1984 Ford F-series. I ran the calculations on the air flow through the HVAC box, fan speeds, etc. There was no way at the CFM that results from a blower on HIGH that you can have a 38 degree output when the air temperature coming in...

First, a pusher fan will not move as much air as a puller fan. Check to see how much clearance you have between the radiator and mechanical fan. The newer fans have become much slimmer and will probably fit. Next, you either will have to have your system heat sensitive and rig up a sensor on the con...

I remember someone coming here and saying that their R134a converted Ford truck blew AC at 38 degrees out the vents with the fan on high, both doors open, on a 100 degree day. I don't see how that is possible, but I'd like to know more.