Quote:
Originally Posted by parsonsj
How about this question: do Jackass, Red Devil, Mayhem, and XV use a trinary (or binary) switch? Let the ECM manage the fan, but the fail-safe requirement when the refrigerant gets dangerously high is still allocated to the binary/trinary switch?
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Yes - compressor controlled by Vintage Air (including bi/trinary switch), with PWM fan controlled by ECM.
Typically fan request for AC pressure never more than 30-40% (and only that high on very high demand AC environment). At that level, can barely hear fan running.
At full tilt (90% DC for most PWM fan controllers), an 850W fan tends to make a little noise - but only see that level during track use due to ECT, IAT or oil temp. I'm ok with fan making some noise then - especially if controlling temps.