The owner of Vintage Air wrote a book on AC systems. I read part of it when I was engineering my sysytem. In it he discusses the how to pick the proper size displacement for your AC pump. He specific points out that the Sanden 7 series is to large for most auto applications. Unfortunately, I do not recall his reasoning. However, his publication is available or a call to Vintage Air would probably suffice. The 5 series was a better solution.
I'm simply addressing the point that someone was making about failure of others to think outside the box and following blindly the decision of others like lemmings. Actually, some past decision were based on research whether accurate or not. Bigger not always better.
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