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Old 09-06-2012, 10:01 AM   #13826
ans2k
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Quote:
Originally Posted by uspopo View Post
I believe Rally Innovations and Gorilla are working on one for our cars. Get-Primitive already has skid plates out.
yea, i have already emailed them. thats is why i said yet. and im looking for a light bar/skid plate combo.

Quote:
Originally Posted by sgoldste01 View Post
I like my tires slightly harder than spec, so I'm inflated to 34 at all four corners. Does anyone see a problem with that? Or is is really necessary to inflate 2 lbs harder in front than in the rear?
didnt think so, since some people's imp came with 36-38psi.
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Old 09-06-2012, 10:11 AM   #13827
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Originally Posted by ans2k View Post
didnt think so, since some people's imp came with 36-38psi.
OK, I was mainly curious as to how important it is to make the front tire pressure 2 lbs higher than the rears, since I used the same pressure (34 lbs) all the way around. I suppose I could do 36 front/34 rear, or 34 front/32 rear, or something like that.
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Old 09-06-2012, 10:11 AM   #13828
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I might actually add a few psi's over spec to my tires as well, to help with mpg.
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Old 09-06-2012, 11:10 AM   #13829
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higher pressure in the front is probably due to the extra weight from the engine and transmission over the front axle.

I run the factory recommended pressure. The car has been tested by Subaru at that pressure.

I think it is pretty dumb to mess with it to either try to save gas (over inflation) or add traction (under inflation), as any gas saving from tire inflation is probably more easily accomplished by using a softer application of the accelerator, or just buy a Prius.

If the car came with higher tire pressures it is not because it is good for the car, it is because they are shipped with 40+ PSI and the tech doing the initial prep checked off the box on your car saying they adjusted the pressure when in fact they didn't do what they were supposed to do.

Keep in mind I asked before driving off the lot if they had adjusted the pressure, the sales rep said "of course, it is part of the prep" and I needed to bleed about 10lbs per tire the next day after I got home and checked it (don't check it when it is hot, it will always be higher).

But it's your car, if you want to mess with the tire pressure, have at it. Just do it from an informed position.
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Old 09-06-2012, 11:30 AM   #13830
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I don't inflate at higher pressures to increase gas mileage. I increase pressure because I like my tires to have a stiffer side wall for improved handling.

Engineering and marketing consists of compromises. I can imagine the suspension engineers wanting higher pressure for better handling, and the marketing guys wanting lower pressure for a ride that will appeal to more people.

I like a firmer ride than most people, so I increase pressure.
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Old 09-06-2012, 11:40 AM   #13831
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^^^ agreed
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Old 09-06-2012, 11:47 AM   #13832
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Quote:
Originally Posted by sgoldste01
I don't inflate at higher pressures to increase gas mileage. I increase pressure because I like my tires to have a stiffer side wall for improved handling.

Engineering and marketing consists of compromises. I can imagine the suspension engineers wanting higher pressure for better handling, and the marketing guys wanting lower pressure for a ride that will appeal to more people.

I like a firmer ride than most people, so I increase pressure.
Well said! You're exactly right about engineering and compromises. I see it all the time not only in automotive, but aviation as well.
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Old 09-06-2012, 11:47 AM   #13833
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Quote:
Originally Posted by sgoldste01
I don't inflate at higher pressures to increase gas mileage. I increase pressure because I like my tires to have a stiffer side wall for improved handling.

Engineering and marketing consists of compromises. I can imagine the suspension engineers wanting higher pressure for better handling, and the marketing guys wanting lower pressure for a ride that will appeal to more people.

I like a firmer ride than most people, so I increase pressure.
I went from 38/36 to 34/32 and the handling drastically improved, and no impact at all on mpg
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Old 09-06-2012, 11:57 AM   #13834
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The TPMs also come on at 4psi +- the recommended pressure, so thats always something to keep in mind
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Old 09-06-2012, 12:27 PM   #13835
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Quote:
Originally Posted by imcausinmadrukis View Post
I used carwoo.com to buy my 2012 Subaru.

I saved about 2-3k on negotiating from my own home.

Secret tip: create multiple fake emails (write down all login in)

I was able to get two different offers on the same car from the same salesperson and saved 700 dollars by pretending the two emails were two different people.
same here...i did the exact same thing.
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Old 09-06-2012, 01:12 PM   #13836
kenny doggins
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Originally Posted by jasonz34 View Post
Where did you get the bar?
that was just a google image search, not my car. and yeah that's totally over the top! I do want a skidplate though.
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Old 09-06-2012, 01:17 PM   #13837
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Quote:
Originally Posted by Zeeper View Post

I think it is pretty dumb to mess with it to either try to save gas (over inflation) or add traction (under inflation), as any gas saving from tire inflation is probably more easily accomplished by using a softer application of the accelerator, or just buy a Prius.
...
But it's your car, if you want to mess with the tire pressure, have at it. Just do it from an informed position.
Get off your high horse dude
maybe your the one who should go buy a prius...
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Old 09-06-2012, 01:36 PM   #13838
sgoldste01
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Quote:
Originally Posted by kenny doggins View Post
that was just a google image search, not my car. and yeah that's totally over the top! I do want a skidplate though.
I had a skid plate on my TDI, but don't plan to put one on the Impreza. The Impreza's clearance is higher, and the oil pan doesn't hang down unprotected like it did on the TDI.
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Old 09-06-2012, 02:20 PM   #13839
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My car came with 42 psi at all corners. I reduced the pressure to the factory recommended 32 f, 30 r, and the handling improved noticeably. Specifically, more oversteer and better bump absorption. Less pressure allows tires to heat more for better traction. Good question about increasing pressure for less rolling resistance though, might lead to increased fuel economy.

Wondering if anyone is running a hitch-mount bumper guard of some sort? I usually leave my ball in the receiver to protect against bumpers touching during parking.
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Old 09-06-2012, 02:37 PM   #13840
kenny doggins
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Originally Posted by sgoldste01 View Post
I had a skid plate on my TDI, but don't plan to put one on the Impreza. The Impreza's clearance is higher, and the oil pan doesn't hang down unprotected like it did on the TDI.
sweet. yeah i wonder why anyone would even make them
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Old 09-06-2012, 03:01 PM   #13841
sgoldste01
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Quote:
Originally Posted by kenny doggins View Post
sweet. yeah i wonder why anyone would even make them
Well, the Subaru rally folks could certainly use a skid plate.

But if you look at the oil pan on your Impreza, you'll see that it isn't hanging in the breeze like on the TDI. It's pretty well protected. With the TDI, I'd worry about tire treads, ice chunks that fall off of cars in front of me in the winter time, etc. I'm not worried about those things with the Impreza.
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Old 09-06-2012, 03:19 PM   #13842
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Quote:
Originally Posted by KartRacer3 View Post
Get off your high horse dude
maybe your the one who should go buy a prius...
You know what they say, everyone on the internets (sic) is an expert and also has a black belt.

I don't personally know any of the engineers who worked out the optimal tire pressure that is printed on the door frame of my car. I just follow it, I guess I am a lemming that way.

As for your theories, they are worth nada to me. Do what you want, but don't pretend you know better than the engineers, unless you do, in which case pump up your pressure as high as you desire.

Also, when you get a chance, invite me to your multi-million dollar test track so I can see if 79's reported 130mph is possible (in your test car, not mine). I know no one here is relying on their "seat of the pant's observations" when it comes to the optimal tire pressure, you've tested it scientifically, right?

Last edited by Zeeper; 09-06-2012 at 04:24 PM.
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Old 09-06-2012, 03:56 PM   #13843
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Quote:
Originally Posted by Zeeper

You know what they say, everyone on the internet's is an expert and also has a black belt.

I don't personally know any of the engineers who worked out the optimal tire pressure that is printed on the door frame of my car. I just follow it, I guess I am a lemming that way.

As for your theories, they are worth nada to me. Do what you want, but don't pretend you know better than the engineers, unless you do, in which case join the internet's experts club and pump up your pressure.

Also, when you get a chance, invite me to your multi-million dollar test track so I can see if 79's reported 130mph is possible (in your test car, not mine). I know no one here is relying on their "seat of the pant's observations" when it comes to the optimal tire pressure, you've tested it scientifically, right?
Just keep going dude, this is hilarious.
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Old 09-06-2012, 04:40 PM   #13844
kenny doggins
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Quote:
Originally Posted by sgoldste01 View Post
Well, the Subaru rally folks could certainly use a skid plate.

But if you look at the oil pan on your Impreza, you'll see that it isn't hanging in the breeze like on the TDI. It's pretty well protected. With the TDI, I'd worry about tire treads, ice chunks that fall off of cars in front of me in the winter time, etc. I'm not worried about those things with the Impreza.
There are loads of other benefits besides protecting the oil pan. That's all, I get what you're saying.
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Old 09-06-2012, 11:28 PM   #13845
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For those interested, I installed the draw-tite hitch tonight and it was super easy. Less than an hour and you don't even need to drop the muffler, as it is a bit smaller than the 2011 muffler. The fit is very snug and well positioned. Got it from etrailer.com
The pics are a bit dark, but you get the idea.



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Old 09-07-2012, 03:34 AM   #13846
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Looks great Al.
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Old 09-07-2012, 11:30 AM   #13847
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Originally Posted by Algreen View Post
For those interested, I installed the draw-tite hitch tonight and it was super easy. Less than an hour and you don't even need to drop the muffler, as it is a bit smaller than the 2011 muffler. The fit is very snug and well positioned. Got it from etrailer.com
The pics are a bit dark, but you get the idea.
Excellent pix. From the angle of the pix, it looks like the hitch doesn't reduce the ground clearance. True?
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Old 09-07-2012, 12:23 PM   #13848
myrt1987
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During every cold engine start, the rpms fluctuate pretty drastically about 600 rpms or so. Does anyone else encounter this?

After i turn the key, the rpms will peak and settle down a bit, and settle, and settle, until it sounds relatively quiet almost like its about to shut off (around 1000 rpms) then shoot up to about 1800. Then hover around there until warm.

Temps havent been near freezing or anything. Should i look into this further?
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Old 09-07-2012, 12:24 PM   #13849
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Originally Posted by myrt1987 View Post
During every cold engine start, the rpms fluctuate pretty drastically about 600 rpms or so. Does anyone else encounter this?

After i turn the key, the rpms will peak and settle down a bit, and settle, and settle, until it sounds relatively quiet almost like its about to shut off (around 1000 rpms) then shoot up to about 1800. Then hover around there until warm.

Temps havent been near freezing or anything. Should i look into this further?
Doesn't seem normal to me...I'd check it out!
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Old 09-07-2012, 12:28 PM   #13850
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Doesn't seem normal to me...I'd check it out!
I disagree. I've seen similar behavior when the engine is stone cold. I wouldn't worry about it.
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