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  #11  
Old 10-02-2016, 12:49 PM
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Quote:
Originally Posted by will69camaro View Post
Just touching on this, do you need to reference the speed? If it's PWM, just have it turn down as it approaches desired temp. As speed increases, temp will drop and the fans will as well without needing to reference the VSS.

Just a thought.

William
I've been using VSS as part of my fan control strategy, but from experience I can say that it isn't really needed. Personally if a car has A/C it makes more sense to do CTS vs. A/C pressure. If no A/C then you can do CTS vs. engine oil temp.

Andrew
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  #12  
Old 04-13-2017, 11:31 PM
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Originally Posted by andrewb70 View Post
I've been using VSS as part of my fan control strategy, but from experience I can say that it isn't really needed. Personally if a car has A/C it makes more sense to do CTS vs. A/C pressure. If no A/C then you can do CTS vs. engine oil temp.

Andrew
How does one set up a CTS vs A/C pressure? Where and how do you get A/C pressure. My car has a trinary switch is that used? I do have a VSS in my car but I am intrigued by the idea of using A/C pressure.

Thanks, Larry

Last edited by Larry R; 04-13-2017 at 11:53 PM.
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  #13  
Old 04-14-2017, 11:31 AM
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We just did a Dominator in a 32 and we used a holley 500 PSI pressure transducer. This allowed us to skip the binary switch and the gm pressure sensor and do it with one sensor. We control the pwm fan and control compressor clutch engagement (high and low pressure cut off) through the ecm.

So far, it works.
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Last edited by dontlifttoshift; 04-15-2017 at 11:19 AM.
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  #14  
Old 04-14-2017, 11:22 PM
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Interesting concept, and since it works, worth considering. I do like the idea of having the fans either go off or be drastically slowed down at speeds above, say, 55 to 60 mph. I'm new to the PWM idea so I have a lot to learn. Thanks.
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  #15  
Old 04-16-2017, 09:19 AM
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Quote:
Originally Posted by dontlifttoshift View Post
We just did a Dominator in a 32 and we used a holley 500 PSI pressure transducer. This allowed us to skip the binary switch and the gm pressure sensor and do it with one sensor. We control the pwm fan and control compressor clutch engagement (high and low pressure cut off) through the ecm.

So far, it works.
What threads does the Holley 500PSI transducer have? Thanks, Larry
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  #16  
Old 04-16-2017, 10:14 AM
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What threads does the Holley 500PSI transducer have? Thanks, Larry
One eighth NPT.

Andrew
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