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  #31  
Old 08-04-2015, 01:29 PM
vstech's Avatar
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the problem with the chart you are reading is, it doesn't take into consideration the vehicle, it's condenser design, the temp in the car, the airflow across the coils, or the humidity level in the area.

trust me. if you are setting a MB converted to run on 134, you are going to have problems going by that chart.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
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  #32  
Old 08-05-2015, 12:55 PM
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Quote:
Originally Posted by vstech View Post
the problem with the chart you are reading is, it doesn't take into consideration the vehicle, it's condenser design, the temp in the car, the airflow across the coils, or the humidity level in the area.

trust me. if you are setting a MB converted to run on 134, you are going to have problems going by that chart.
Can you post a chart that I should be using for my 85 MB converted to 134? It cools good enough for me at the moment (59 F at the vents @ 90 F ambient).
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  #33  
Old 08-05-2015, 01:16 PM
vstech's Avatar
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Join Date: Mar 2006
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My point is, there isn't a chart to go by.

too many variables.

Add 60% of 12 quantity, and with honking big fans in front of the car, with all windows rolled down, blower on high, engine at 1000 rim or so, add freon until ssh drops to 20degrees then SLOWLY adjust charge to get 40 or so out the vents...
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #34  
Old 08-05-2015, 01:26 PM
funola's Avatar
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Join Date: May 2005
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Quote:
Originally Posted by vstech View Post
My point is, there isn't a chart to go by.

too many variables.

Add 60% of 12 quantity, and with honking big fans in front of the car, with all windows rolled down, blower on high, engine at 1000 rim or so, add freon until ssh drops to 20degrees then SLOWLY adjust charge to get 40 or so out the vents...
60% or 90%? What is "until ssh drops to 20 degrees"?

"SLOWLY adjust charge to get 40 or so out the vents..." It may never reach 40F with 134 if the ambient is 90F or above.
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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked
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  #35  
Old 08-05-2015, 10:17 PM
vstech's Avatar
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Join Date: Mar 2006
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Ssh is the vapor pressure subtracted from actual line suction line temp.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #36  
Old 08-06-2015, 03:21 AM
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Quote:
Originally Posted by vstech View Post
My point is, there isn't a chart to go by
, blower on high, ...
Blower is supposed to be on LOW......
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