Recirculate without A/C
#31
Originally Posted by doogie
I also believe you'd find that your MPG would be less if you drove with the windows down and AC off, than if you drove with the AC on.
#32
I saw that episode of MythBusters too but didn't totally agree with their findings. "Course, those guys are nuts and don't think everything through. I was suprised though.
They were only doing 50 or so MPH. You will see more of a difference at real hwy speeds of 70-80. At least the posted limit in my state is 70 MPH.
An SUV already has a high cg so rolling down the windows doesn't hurt proportionately as much as ruining the .27 cg of our G by rolling down the window.
They had the A/C set on MAX the entire run. Who would do that in real life.
I know in the two 1800 mile runs I have made, I got a little more than 1 MPG better with the windows up and A/C on ECON mode than I got with windows down.
And, with the windows up I can actually hear my "PREMIUM" radio.
They were only doing 50 or so MPH. You will see more of a difference at real hwy speeds of 70-80. At least the posted limit in my state is 70 MPH.
An SUV already has a high cg so rolling down the windows doesn't hurt proportionately as much as ruining the .27 cg of our G by rolling down the window.
They had the A/C set on MAX the entire run. Who would do that in real life.
I know in the two 1800 mile runs I have made, I got a little more than 1 MPG better with the windows up and A/C on ECON mode than I got with windows down.
And, with the windows up I can actually hear my "PREMIUM" radio.
#33
Originally Posted by SaltiDawg
Ah, but do you make a successful living in technology? I trust it is not in automotive design nor Thermodyamics.
Originally Posted by SaltiDawg
Again, car manufacturers (GM and others) going back at least to the 1970's have incorporated this feature - 1970 Olds specifically was my first car with A/C and it had this feature.
Originally Posted by SaltiDawg
The power demand of an unloaded or very lightly loaded A/C is not 10HP or more. It is nil.
Originally Posted by SaltiDawg
Stop whining about Infiniti's intrusion into your space and live with a well engineered car.
Originally Posted by Henry Ford
You can buy it in any color, as long as it’s black.”
BS...
Originally Posted by SaltiDawg
PS "A transmission that tells me what gear I should be in and shifts itself?" I assume that you didn't get the 5AT and also that you have disabled the shift light on your 6MT, all as a matter of not having your space intruded on.
#34
I suppose I'll chime in here one more time. I'd decided to let Salti's post-full-of-errors-and-assumptions go, under reasoning that when someone is that far out of the ballpark there'll be no convincing him of where center field is.
The problem I have with Nissan's automatic climate control in the G35 is about engineering restrictions in design for no good reason. There's little or no cost associated with giving me the ability to shut the compressor completely off when recirculating air. This is feature so commonly included in vehicles built over the last four decades as to be unmentioned and assumed. Yet Nissan, the same company who built my old '02 Altima 3.5 with ACC that had this option, and the same company who built my wife's '02 G20 Sport with ACC that has this option, chose to leave it off my G35. SaltiDawg, if you can give me one good engineering reason as to why Nissan took this feature away, I'll go with you on it.
But you can't. There is none. And your assertion that a "lightly loaded" compressor consumes "nil" horsepower may be technically true. But what you're really trying to say, as JasonJ75 pointed out, is that a compressor that's not engaged consumes no horsepower. Well, duh. That's why I want the option to turn the thing off when I recirculate cabin air.
There's no such thing as a "lightly loaded" compressor when it's engaged. It's running. It's compressing refrigerant. That takes horsepower. Lots of it. (Anyone who's ever driven a weak-kneed four-cylinder car with the A/C on knows what a dog-butted car you're driving while you're cool and fresh.) It drags on fuel economy. Substantially.
So let's not mislead people here.
I'll leave the rest of Salti's personal comments alone. They're not worth addressing.
The problem I have with Nissan's automatic climate control in the G35 is about engineering restrictions in design for no good reason. There's little or no cost associated with giving me the ability to shut the compressor completely off when recirculating air. This is feature so commonly included in vehicles built over the last four decades as to be unmentioned and assumed. Yet Nissan, the same company who built my old '02 Altima 3.5 with ACC that had this option, and the same company who built my wife's '02 G20 Sport with ACC that has this option, chose to leave it off my G35. SaltiDawg, if you can give me one good engineering reason as to why Nissan took this feature away, I'll go with you on it.
But you can't. There is none. And your assertion that a "lightly loaded" compressor consumes "nil" horsepower may be technically true. But what you're really trying to say, as JasonJ75 pointed out, is that a compressor that's not engaged consumes no horsepower. Well, duh. That's why I want the option to turn the thing off when I recirculate cabin air.
There's no such thing as a "lightly loaded" compressor when it's engaged. It's running. It's compressing refrigerant. That takes horsepower. Lots of it. (Anyone who's ever driven a weak-kneed four-cylinder car with the A/C on knows what a dog-butted car you're driving while you're cool and fresh.) It drags on fuel economy. Substantially.
So let's not mislead people here.
I'll leave the rest of Salti's personal comments alone. They're not worth addressing.
#36
#39
"if you can give me one good engineering reason as to why Nissan took this feature away, I'll go with you on it."
I don't want to adjudicate a flame war and I'm not an engineer. This may not be an engineering reason, but since the A/C dehumidifies it prevents moisture build-up that can lead to bad smell and mold. This, from an engineering view, I suppose, saves warranty work for odors, etc.
My Subaru (LL Bean) with auto climate control has the defroster come on everytime I start the car in cool weather (unless the unit is turned off). I find this curious, and have been unable to change it.
I don't want to adjudicate a flame war and I'm not an engineer. This may not be an engineering reason, but since the A/C dehumidifies it prevents moisture build-up that can lead to bad smell and mold. This, from an engineering view, I suppose, saves warranty work for odors, etc.
My Subaru (LL Bean) with auto climate control has the defroster come on everytime I start the car in cool weather (unless the unit is turned off). I find this curious, and have been unable to change it.
#40
I see I am not the only one who's having problems with the temperture control unit. I was thinking about a direct swap with the '05 unit but looks it's same sh8t.
Why was it blowing at full speed after I pressed ECON, when outside temp is 65, and I have set the inside temp to 60? and when I adjust the temp up to 65, all the suddent it starts to blow hot air, even when the A/C is on, when I decrease the air speed it goes to "manual," if I rise the temp a little bit, it'll start to blow hot air... annoying. now I hope the '06 model has a better and more simple unit for direct swap.... but besides that I love the damn car
Why was it blowing at full speed after I pressed ECON, when outside temp is 65, and I have set the inside temp to 60? and when I adjust the temp up to 65, all the suddent it starts to blow hot air, even when the A/C is on, when I decrease the air speed it goes to "manual," if I rise the temp a little bit, it'll start to blow hot air... annoying. now I hope the '06 model has a better and more simple unit for direct swap.... but besides that I love the damn car
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G35 Sedan V35 2003-06
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10-01-2015 09:02 AM