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Old 09-28-2013, 07:49 PM   #21
VOLDAR
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That sounds about right. I experience a difference of about 3 MPG highway dependent on the A/C being on or off. That seems in line with most other cars I've owned in the past though, so it's hard to say what portion of that difference can be attributed to the shutters.
I always used the A/C in my car (Auto on at 22 C = 71.6 F) and I was able to get 39.6 mpg at a steady 65 mph speed in a long trip. You imply that I might even get better mpg => 43 mpg if I'd not use A/C ? This is almost 5 mpg above the EPA and we all know in what conditions EPA tests are done. If I'd go at a 55 mph speed, I am sure even 43 with A/C on would be reachable, if the drive would be long enough.
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Old 09-29-2013, 11:15 AM   #22
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You imply that I might even get better mpg => 43 mpg if I'd not use A/C ?
Yes, that is correct, if your "auto" setting is cycling the compressor. It takes power to run the A/C compressor. All other things equal (windows up), you will of course get better gas mileage with the compressor off vs. on.
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Old 09-30-2013, 06:44 AM   #23
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I would say since the new compressors only take .95 HP to run unlike the dinosaur compressors not worth the heat while driving in 110 degree weather.
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Old 09-30-2013, 11:12 AM   #24
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With the a/c on the compressor feels like an anchor on my manual trans Focus.
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Old 10-29-2013, 09:51 PM   #25
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I would just mention the shutters are not just 'on' and 'off'. The shutters have a variety of intermediary positions.
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Old 10-29-2013, 10:40 PM   #26
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Quote:
Originally Posted by Seminoles View Post
I would say since the new compressors only take .95 HP to run unlike the dinosaur compressors not worth the heat while driving in 110 degree weather.
May I ask where this info came from , the AC only looses 1hp when it is running ?
The more RPM that it turns the more power it takes to tune it , I think they take about 7hp at idle cruise and about 12-14 HP at max psi then the hotter it is the more psi it builds so the more HP to turn it

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Old 10-31-2013, 09:30 AM   #27
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With the a/c on the compressor feels like an anchor on my manual trans Focus.

Ford changes the throttle mapping when the AC is on ... hate it.
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