I would beleive a larger vehicle could have colder A/C. Efficiency is the key. A bigger condensor/compressor coupled to proportianate evap, etc. WILL be colder. A system DESIGNED for 134a will ALWAYS be colder than one converted, unless you change more hardware. My PSD will get tooo cold inside no matter how hot it is outside.

I did use an expansion valve for 134a in my toyota's system, but didn't notice much difference. I think if you want a 1rst gen Toyota to get colder, you have to increase airflow over the condensor (ie, elect fan), and pay the big bucks for R12.

Remember when R12 was .75/lb and you could get it at walmart? WE GOT SCREWED!!! And, before you think we're saving the environment, you need to know more about CFC's and the company who held the -now expired- patent on R12.

I'm sorry about the rant, its just sad when big business can BS the gov so they can make mega$$$$ for themselves.

<img src="/forums/images/graemlins/scared.gif" alt="" /> OK thats enough! <img src="/forums/images/graemlins/ignore.gif" alt="" />