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Discussion Starter · #1 ·
I have an 03 Durango RT, and in the summer, when I stomp on it (WOT), the AC clutch disengages. I'm assuming this is either to allow the engine full torque/power on request, or to prevent the AC compressor from going over it's max RPM.
On my 06 Charger SRT, I have not noticed this behavior; it seems the AC clutch remains engaged even under WOT.
Am I correct on this, or just not noticing it disengaging?

Thanks!
 

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I have an 03 Durango RT, and in the summer, when I stomp on it (WOT), the AC clutch disengages. I'm assuming this is either to allow the engine full torque/power on request, or to prevent the AC compressor from going over it's max RPM.
On my 06 Charger SRT, I have not noticed this behavior; it seems the AC clutch remains engaged even under WOT.
Am I correct on this, or just not noticing it disengaging?

Thanks!
It disengages at WOT, you just aren't noticing it.
 
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I have an 03 Durango RT, and in the summer, when I stomp on it (WOT), the AC clutch disengages. I'm assuming this is either to allow the engine full torque/power on request, or to prevent the AC compressor from going over it's max RPM.
On my 06 Charger SRT, I have not noticed this behavior; it seems the AC clutch remains engaged even under WOT.
Am I correct on this, or just not noticing it disengaging?

Thanks!
I had an '03 Durango R/T and the A/C was a terrible design due to the heat build up in the under dash air distribution box. It was a design problem that plagued that Durango/Dakota version. The heater core would build up so much heat in the air box that it raised the cold air vent temp by at least 10 degrees. I installed a vacuum actuated heater control valve that was modulated by an electric vacuum valve triggered by the A/C clutch circuit. It worked great and shut off the coolant flow through the heater core automatically whenever the A/C clutch was engaged. That dropped my vent temps from 52 deg to 38 deg. You should try it!
 

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Discussion Starter · #5 ·
I had an '03 Durango R/T and the A/C was a terrible design due to the heat build up in the under dash air distribution box. It was a design problem that plagued that Durango/Dakota version. The heater core would build up so much heat in the air box that it raised the cold air vent temp by at least 10 degrees. I installed a vacuum actuated heater control valve that was modulated by an electric vacuum valve triggered by the A/C clutch circuit. It worked great and shut off the coolant flow through the heater core automatically whenever the A/C clutch was engaged. That dropped my vent temps from 52 deg to 38 deg. You should try it!
That sounds like a good solution, for the summer. How would that affect the defroster, as the AC runs to dry the air for the defrost?
 

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That sounds like a good solution, for the summer. How would that affect the defroster, as the AC runs to dry the air for the defrost?
It worked OK since the A/C clutch cycles on and off. That would allow some coolant to flow through the heater core and provide heat in a pinch. In the dead of winter when it didn't matter about the air box warming up, I would disable the mod so coolant would always flow through the heater core as it normally would by design.
 
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