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Old 10-06-2010, 02:53 PM   #1
GTWORX.com
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Default Insight Into 2011 WRX Track Width Change

Being the first shop to install upgraded struts/shocks onto a 2011 WRX (as far as I know), we discovered a few interesting things along the way. As some of you may know, Myles picked up a 2011 sedan at the end of last week and within 300 miles we had it apart to do GTWORX Bilsteins, Yellow springs, swaybars, group-n engine/trans/pitch stop mounts, wheels, and accessport.

First, and most predictably, the WRX now uses the same front swaybar as the GR STi. It's wider than the GH bar, so if you're upgrading, you'll want to get the STi front bar.

What we really wanted to know was where the extra track width came from. Once we got the stock front struts off and compared them to the Bilsteins and took some measurements, it became immediately apparent. The holes in the front clevis tabs are spaced 10mm further out than on the GH struts. I did not take additional measurements, but I assume that the front control arms are 10mm wider as well. What this means is that when using 08-10 struts on the 2011, you gain a ton of front negative camber. With the car on the alignment rack, it maxed out at -2.8 with OEM strut top mounts It can also be dialed back as far as -1.2 for a more conservative alignment.

As far as the rear, camber was unchanged. I didn't have a chance to measure everything back there yet, but I'm guessing they are using an STi rear subframe now. The WRX specific rear swaybar fits perfectly.

With all of these mods done and the camber dialed in to max negative, the car feels absolutely amazing. Turn in feels better than the old 09, and that car had an ALK and most of the suspension bushings upgraded to urethane. I'm not too familiar with the SCCA Solo rules, but assuming you are allowed to use these struts in the stock classes, you might gain a large advantage with the additional camber capability.

Hopefully this helps clear up some of the speculation as to where the extra track width came from. If anyone has any questions, feel free to fire away. I'll leave you with a few pictures of the new car after all the mods were done.

-Dan











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Old 10-06-2010, 03:11 PM   #2
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good to hear.... was kinda wondering on what's was changed and whats very similar to the STI....
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Old 10-06-2010, 03:21 PM   #3
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Quote:
As far as the rear, camber was unchanged. I didn't have a chance to measure everything back there yet, but I'm guessing they are using an STi rear subframe now. The WRX specific rear swaybar fits perfectly.
How would that increase the rear track? The GH/GE and the 08+ STI have always shared RSBs and the rear lca is the same so even if the rear subframe are different, they still have to have the same connection point dimensions or the RSBs wouldn't be compatible. You think the knuckles are just fatter such that when you bolt the hub unit bearing onto the knuckle the track is increased?
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Old 10-06-2010, 03:22 PM   #4
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Dan thanks for this, inquiring minds wanted to know and you didn't disappoint!

As for the rear, I know you have wrenched on the 2011 and I am just here speculating, but I disagree about this "STI subframe" business that is floating around, I know the part numbers are different, but I am almost sure the dimensions are the same.

We know ALL 08-10 Imprezas share the same rear suspension arms, and sway bar dimensions. If the track width was in a wider subframe on the STI, then the rear sway bar dimensions would have to be different on the STI as it uses the same lower lateral arm with the same attachment point for the end link.

I'm guessing you'd have to compare the rear hub carriers to see if that is where the track width difference is, which is where my money would be if we were betting on it.
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Old 10-06-2010, 03:23 PM   #5
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Haha ^^

Quote:
I'm not too familiar with the SCCA Solo rules, but assuming you are allowed to use these struts in the stock classes, you might gain a large advantage with the additional camber capability.
GH/GE struts on a 2011 would not be legal in DS now that we know this info about the 11 WRX strut clevis .
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Old 10-06-2010, 03:32 PM   #6
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Originally Posted by 09rexwagon View Post
Haha ^^

GH/GE struts on a 2011 would not be legal in DS now that we know this info about the 11 WRX strut clevis .
well lets "unknow" it....lol. Thread delete.....lol

jk.

M.
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Old 10-06-2010, 03:35 PM   #7
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I really think the control arms and or caster bushings are different also becase my car withOUT an ALK is getting +6.6 caster ! Thats EXACTLY what most GR STI's get stock.

I know one thing this car with MUCH less suspension bushings is faster than the 09 was with the same shocks on it. I mean its several MPH faster in mutliple places.

Wider track helps for sure, and now the added caster.

AMAZING !

M.
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Old 10-06-2010, 03:38 PM   #8
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Originally Posted by GTWORX.com View Post
well lets "unknow" it....lol. Thread delete.....lol

jk.

M.
Haha.

Man I can only imagine how much a 2011 WRX with 295/35/17s Hoosiers, a 32mm FSB and -2.8* of static camber (ie the Bils on it) would DESTROY the Integra and Mini Cooper S in D stock .
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Old 10-06-2010, 03:40 PM   #9
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Originally Posted by GTWORX.com View Post
I really think the control arms and or caster bushings are different also becase my car withOUT an ALK is getting +6.6 caster ! Thats EXACTLY what most GR STI's get stock.

I know one thing this car with MUCH less suspension bushings is faster than the 09 was with the same shocks on it. I mean its several MPH faster in mutliple places.

Wider track helps for sure, and now the added caster.

AMAZING !

M.
How much caster did you get stock on you 09? I know Mike (Bigsky) got about + 6.3* and I'm floating around 5.9-6.0*.
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Old 10-06-2010, 04:26 PM   #10
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Those 19 inch rpf1's with the Bilsteins sure fill up the fenders, no more fist full of gap. Shop looks immaculate too, great shot of the white car in the white shop.
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Old 10-06-2010, 04:35 PM   #11
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Quote:
Originally Posted by GTWORX.com View Post
I really think the control arms and or caster bushings are different also becase my car withOUT an ALK is getting +6.6 caster ! Thats EXACTLY what most GR STI's get stock.
on my 11wrx/PDI, i asked to max out camber / 0 toe all around..... i ended up -1.8 front camber and caster was 6.4 (front left) and 6.1 (front right).
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Old 10-06-2010, 04:36 PM   #12
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Quote:
Originally Posted by etothen View Post
Those 19 inch rpf1's with the Bilsteins sure fill up the fenders, no more fist full of gap. Shop looks immaculate too, great shot of the white car in the white shop.
They don't look like 19s
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Old 10-06-2010, 04:58 PM   #13
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Originally Posted by Ric WRX View Post
They don't look like 19s
They are 19x8's
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Old 10-06-2010, 05:03 PM   #14
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They don't look like 19s
Equate that the the big wheelwells.
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Old 10-06-2010, 05:25 PM   #15
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wow, that is a nice looking car. I have never loved how our cars look but that is very nice looking.
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Old 10-06-2010, 06:23 PM   #16
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Seeing this 11 with the new fenders in the real world with those wheels and that drop looks nasty! Beautiful.
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Old 10-06-2010, 09:50 PM   #17
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has it been determined if the '11 LCAs are plug-n-play on the 08-10?

(alternative to com-c's that will never come out?)
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Old 10-06-2010, 11:35 PM   #18
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After a 1hr shake down tonight I can honestly say this car with its wider track, factory upgraded rear bushings, the GTWORX/Bilsteins, a good solid alignment, crazy ALK like caster from the factory and some grippy Michelin PS2's,...I can honestly say this car has a BMW"M" like prowess that my neighbor says..(E92 M3 owner) and I quote .." why did I spend 60k on my car when you have this thing hooked up like this...".

I then took his car on the same road and yes while it has more power on the top end....it doesnt have the mid corner bite, doesnt have the ability to trail into some tight off camber, wet on one side type corners like the 2011 WRX does.

Mind you all of this BEFORE I do ALK, ALCON brakes, camber bushings in the rear, and Recaro's. I might just sell the Prodrive brakes and do some GOOD pads and lines and call it a day.

Dont get me wrong I did the M3 product launch and know what its capable of, but even if I am biased and placebo-ed with my new shocks and car.....the 2011 WRX is now in a different league than before. SOA is slowly going to see STI sales go Bye bye!

Good shocks, good alignment, good tires, (AP stg 1 helps) ...and you can really start to feel like you spent 60k as you might just hear the deep German voice of the announcer telling you why you are driving the ultimate driving machine !

Mw.
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Old 10-06-2010, 11:43 PM   #19
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Oh and at one point I totally overshot a brake zone and was on the binders HARD, way too long to attempt turning in, excect your choice is...turn in or go thru some farmer's front room with an old VHF antenna on the TV ! So as I am braking SUPER HARD, I think.." oh well ABS will save me along with the traction control.."...except....it wasnt on! As I feel the rear coming out in slow motion, I start to turn in and take my left foot off the brake and squeeze on the gas with my right foot, I notice the rear isnt coming out like a GT3 in the rain, but in a super controlled.." hey I am out here if you need to turn in" kinda way.
I was able to get on the gas and literally drive thru the corner with the gas on boost and with a wicked smile on my face like the kid who played sick during the school day and still got to go outside and play after school! It was amazing. At that moment I knew talking the wife into getting this car was the best thing since getting my white on gold STI in May of 2003!

The car is amazing.

NOTE: this was with 235's, can you imagine a 10inch wheel and say,....a 275 section tire? PURE GRIP !

M.

Last edited by GTWORX.com; 10-06-2010 at 11:52 PM.
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Old 10-07-2010, 01:40 AM   #20
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Congrats Myles! This all sounds awesome : ).
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Old 10-07-2010, 09:02 AM   #21
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Damn it Myles. I was completely content with my 09 and the new suspension parts. Now I may need to go car shopping.... How come you seem to cost me a lot of money
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Old 10-07-2010, 11:35 AM   #22
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I was too worked up about the track width, I forgot to mention...the car looks freaking sweet, makes me jealous of the new 'rex with my narrow body over here!
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Old 10-07-2010, 11:41 AM   #23
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I was too worked up about the track width, I forgot to mention...the car looks freaking sweet, makes me jealous of the new 'rex with my narrow body over here!
Haha, I'm trying NOT to look at the 2011s so I wont have the urge to buy one .....it......is......very very.....hard..... to.... resist. All I'd need is a set of 2011 front struts to hack up and put my Koni inserts in there and I'd be D stock legal again
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Old 10-07-2010, 11:49 AM   #24
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Damn it Myles. I was completely content with my 09 and the new suspension parts. Now I may need to go car shopping.... How come you seem to cost me a lot of money
2nd

thanks
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Old 10-07-2010, 11:51 AM   #25
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Quote:
Originally Posted by GTWORX.com View Post
At that moment I knew talking the wife into getting this car was the best thing since getting my white on gold STI in May of 2003!

The car is amazing.

NOTE: this was with 235's, can you imagine a 10inch wheel and say,....a 275 section tire? PURE GRIP !

M.
When are you going to let her drive it ?? hahahaha
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