Topic: Tecumseh AC tech info

[AJ]

Ran across this Tecumseh AC compressor service guide. 

[J_Speegle]

Nice find - Thanks for sharing

[Murf]

Interesting reading and  brings to mind a question that has remained unanswered in my mind for 60 years or more.  You notice that there are three compressors discussed, each of a different displacement ( 5 CID, 8.5 CID and 11 CID.  The Mustangs during the first few years seemed to have the 8.5 cubic inch.  Never have seen a 5 cubic inch, and I assume larger passenger cars were built with the 11 cubic inch.  Here is the  question - what effect would the substitution of an 11 cubic inch compressor on a Mustang have on the system and its performance?  Any thermal types care to venture an opinion and a simple explanation?  Just something that has intrigued me for my adult life. 

[67gta289]

The compressor is one component of a system, so I would expect that increasing the capacity of the compressor (only) would not have a significant improved impact.  Under normal conditions, the compressor will cycle to prevent freezing of the evaporator, so an increased capacity in the compressor would most likely overcome the evaporator much more quickly and be cycled off.  The initial cool-off of a very hot vehicle interior would be faster, but then with the short-cycling of the compressor, the cabin temperature would have much higher temperature swings, and the dehumidification would be reduced.  My thoughts.