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Old 11-19-2012, 02:02 PM   #14626
Commander Keen
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Whatever you are thinking about doing to the airbox, leave it the way it is.
Mine is stock because I don't want the noise. Removing the scoop is 100% reversible and makes the engine louder.
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Old 11-19-2012, 02:50 PM   #14627
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Nothing makes you feel old, when going in for service and some high school kid pulls in with the same car with the sales person asking how's he liking the car cauz his mommy and daddy got him for it.

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Old 11-20-2012, 09:37 AM   #14628
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Quote:
Originally Posted by Commander Keen

Mine is stock because I don't want the noise. Removing the scoop is 100% reversible and makes the engine louder.
As long as you didn't remove the Hensoltz resonator you are okay...
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Old 11-20-2012, 11:30 AM   #14629
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Dealer is pretty clueless on how to adjust the mpg so I'm hoping they can do it. I had to show them the page in the manual on how to do it, but it isn't very descriptive on the process
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Old 11-20-2012, 11:43 AM   #14630
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Originally Posted by sgoldste01 View Post
Snow tires on an AWD car--sounds like fun! LET IT SNOW!
You will learn what many mean when they call a Subaru the pack mule. (Hint: that's a good thing)

--kC
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Old 11-20-2012, 12:24 PM   #14631
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Mpg adjusted. Car lifetime says 28.8, fuelly says 28.7
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Old 11-20-2012, 01:41 PM   #14632
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Originally Posted by flyboy1100 View Post
Mpg adjusted. Car lifetime says 28.8, fuelly says 28.7
What percentage did you adjust it?
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Old 11-20-2012, 02:10 PM   #14633
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Originally Posted by KC View Post
You will learn what many mean when they call a Subaru the pack mule. (Hint: that's a good thing)

--kC
I can hardly wait. I saw a video on YouTube of a Subie (I think it was an older Impreza) that was actually pushing snow that was deeper than its bumper, like a snow plow.
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Old 11-20-2012, 03:05 PM   #14634
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Originally Posted by sgoldste01 View Post
I can hardly wait. I saw a video on YouTube of a Subie (I think it was an older Impreza) that was actually pushing snow that was deeper than its bumper, like a snow plow.
yea, but that is dry dry snow with snow tires.
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Old 11-20-2012, 03:17 PM   #14635
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^^ Understood, but it's still impressive. Do you think a front-wheel drive car with snow tires could do that?
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Old 11-20-2012, 03:22 PM   #14636
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Quote:
Originally Posted by ST Eye
What percentage did you adjust it?
3%. My fuelly takes into account my 2.8% odometer error
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Old 11-20-2012, 04:21 PM   #14637
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Originally Posted by ans2k View Post
yea, but that is dry dry snow with snow tires. http://youtu.be/0FBq7C1qYkE
It's also an STi, which has a much more sophisticated AWD system than your typical subaru.
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Old 11-20-2012, 04:24 PM   #14638
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It's also an STi, which has a much more sophisticated AWD system than your typical subaru.
very true
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Old 11-20-2012, 04:36 PM   #14639
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I'm not sure the STI's additional hardware is really of much use in a situation like that. The VDC in our cars should be able to direct the power where it's needed.
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Old 11-20-2012, 05:11 PM   #14640
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Oh, I already know that my wife's impreza with VDC is very good in the snow. But I think I would prefer setting the DCCD into manual lock (aka drive-like-a-tractor mode) if i were really afraid of getting stuck.
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Old 11-20-2012, 09:54 PM   #14641
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I've had my 5 speed for a few months now. Keeping it super clean until one fall day acorns did some damage to the paper thin sheet metal putting little dents (about 9-13) all over.


This happened to my last WRX sedan and our Hyundai Elantra... all Fall season we stopped parking in our driveway because it just rains acorns constantly. Luckily nothing has happened to the new Subarus..

I will be cutting the trees down in the Spring.
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Old 11-21-2012, 01:51 AM   #14642
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Originally Posted by Commander Keen View Post
I'm not sure the STI's additional hardware is really of much use in a situation like that. The VDC in our cars should be able to direct the power where it's needed.
The the STI's DCCD, you can essentially lock the center diff which gives you better traction in snow. I know the 5-speed '12 Impreza has a 50/50 FR torque distribution, however you are not able to lock it. Plus the front and rear differentials are limited slip - which definitely helps as well.
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Old 11-21-2012, 03:30 AM   #14643
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Originally Posted by Commander Keen View Post
Mine is stock because I don't want the noise. Removing the scoop is 100% reversible and makes the engine louder.
By the scoop do you mean the triangular piece of plastic that channels the air into the air box? Although it would sound louder, wouldn't air flow be affected?
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Old 11-21-2012, 07:45 AM   #14644
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Originally Posted by ST Eye
I know the 5-speed '12 Impreza has a 50/50 FR torque distribution, however you are not able to lock it. Plus the front and rear differentials are limited slip - which definitely helps as well.
In the impreza or the sti are the diffs limited slip?
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Old 11-21-2012, 09:11 AM   #14645
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Originally Posted by ST Eye View Post
The the STI's DCCD, you can essentially lock the center diff which gives you better traction in snow.
Yup! My STI will bind on anything but a slippery surface like a traditional 4x4 system.

Quote:
Originally Posted by ST Eye View Post
I know the 5-speed '12 Impreza has a 50/50 FR torque distribution, however you are not able to lock it. Plus the front and rear differentials are limited slip - which definitely helps as well.
[After re-reading your post ST Eye, it appears that you are saying that the STI has front and rear limited slip differentials and not your a 2012 2.0i. Gotcha.]

Right, the STI has fancy differentials front center and rear while '12 Impreza's make due with open front and rear diffs.

Last edited by jay25RS; 11-21-2012 at 09:13 AM. Reason: Clarification.
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Old 11-21-2012, 09:25 AM   #14646
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From www. autos.ca web site:

"As before, Subaru offers two different all-wheel drive systems in the 2012 Impreza: models with the five-speed manual transmission have a viscous-coupling limited-slip centre differential that distributes power 50/50 front to rear. Impreza’s with the Lineartronic CVT have an electronically managed continuously variable transfer clutch that distributes power 60/40 front/rear under normal driving conditions, but can transfer more power to the rear wheels under certain circumstances."

For those (like me) who don't really know what a limited-slip diff is:

http://en.wikipedia.org/wiki/Limited-slip_differential

As I'm reading that Wikipedia page, it's reminding me of the movie "My Cousin Vinny".

Last edited by sgoldste01; 11-21-2012 at 09:30 AM.
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Old 11-21-2012, 09:55 AM   #14647
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OK, so I was reading the Wikipedia page listed above, and I focused my attention on the limited-slip differential explanation because my Impreza is a 5-speed, so my car has an LSD. Interesting stuff.

Here's the Wiki content I found interesting:

"The viscous type is generally simpler because it relies on hydrodynamic friction from fluids with high viscosity. Silicone-based oils are often used. Here, a cylindrical chamber of fluid filled with a stack of perforated discs rotates with the normal motion of the output shafts. The inside surface of the chamber is coupled to one of the driveshafts, and the outside coupled to the differential carrier. Half of the discs are connected to the inner, the other half to the outer, alternating inner/outer in the stack. Differential motion forces the interleaved discs to move through the fluid against each other. In some viscous couplings when speed is maintained the fluid will accumulate heat due to friction. This heat will cause the fluid to expand, and expand the coupler causing the discs to be pulled together resulting in a non-viscous plate to plate friction and a dramatic drop in speed difference. This is known as the hump phenomenon and it allows the side of the coupler to gently lock. In contrast to the mechanical type, the limiting action is much softer and more proportional to the slip, and so is easier to cope with for the average driver."

This Impreza is not only my first Subie, but also my first AWD car. My previous car was a VW Golf. I put snow tires on the Golf, and I just put snow tires on the Impreza last weekend. I had good control in the snow with the Golf and its snow tires, but my snow driving is very conservative, with me generally not doing anything that would cause tire slip. Gentle accelerating, gentle decelerating, gentle turns, and so on.

I will be curious to see how the Impreza feels in the snow, with snow tires. Should I worry less about slipping tires when I accelerate, knowing that the AWD/limited-slip diff will do its job and figure everything out? Or should I drive the Subie in the same hyper-conservative way when there's snow on the ground?

My guess is that I won't need to be as cautious during acceleration, but that I should handle braking and turns with the same caution. Right?
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Old 11-21-2012, 10:17 AM   #14648
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The the STI's DCCD, you can essentially lock the center diff which gives you better traction in snow. I know the 5-speed '12 Impreza has a 50/50 FR torque distribution, however you are not able to lock it. Plus the front and rear differentials are limited slip - which definitely helps as well.
If we're talking about high speed, high power driving, the STI's system can definitely transfer torque more smoothly and efficiently than the Impreza's VDC.

At low speeds like in the video, VDC can move power anywhere regardless of the initial torque split. If you've seen video of the Impreza or XV crawling around off-road, a wheel in the air will often stop spinning completely as the car moves forward.
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Old 11-21-2012, 10:38 AM   #14649
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My guess is that I won't need to be as cautious during acceleration, but that I should handle braking and turns with the same caution. Right?
Right. Remember that just because you can get your Impreza moving doesn't mean that it will stop! With that being said, I just ordered a set of General Altimax Arctic snow tires and Sport Edition A7 wheels from Tire Rack for my car.
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Old 11-21-2012, 10:48 AM   #14650
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Originally Posted by jay25RS View Post
Right. Remember that just because you can get your Impreza moving doesn't mean that it will stop! With that being said, I just ordered a set of General Altimax Arctic snow tires and Sport Edition A7 wheels from Tire Rack for my car.
I had Altimax Arctics on my VW Golf and loved them. Even though they're studdable, I left them studless and thought they were great. When the Blizzaks WS60s I bought used for my Impreza wear out, I will probably replace them with Altimax Arctics.

You probably know this, but the Altimax Arctics are unidirectional, so make sure you mount them on the correct side of the car!
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