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Old 04-12-2007, 03:20 AM   #1
that one legacy
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Default BG/BK/BD front sway diameter

yeah, so i've been searching for like 3 days now on like three different forums, and can't find the info i'm needing. so, does anyone know what the front sway bar diameters are for:

'95-'99 Legacy L
'97-'99 Legacy GT
'97-'99 Legacy Outback
'97-'99 Legacy Outback Limited (if different from normal Outback)

the reason i ask is that i upgraded to the 18mm Outback rear sway a few days ago, and now i'm searching for the ideal front counterpart. i read somewhere that the GT front sway bar might be a bit thicker than the stock one on my L, but i can't confirm that. the fact that the GT has a smaller rear sway than the Outback also has me really confused.

so anyway, if anyone knows the answers, or can point me to where i can find them, i would be most grateful!
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Old 04-12-2007, 03:24 AM   #2
Kraziken
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Originally Posted by that one legacy View Post
yeah, so i've been searching for like 3 days now on like three different forums, and can't find the info i'm needing. so, does anyone know what the front sway bar diameters are for:

'95-'99 Legacy L
'97-'99 Legacy GT
'97-'99 Legacy Outback
'97-'99 Legacy Outback Limited (if different from normal Outback)

the reason i ask is that i upgraded to the 18mm Outback rear sway a few days ago, and now i'm searching for the ideal front counterpart. i read somewhere that the GT front sway bar might be a bit thicker than the stock one on my L, but i can't confirm that. the fact that the GT has a smaller rear sway than the Outback also has me really confused.

so anyway, if anyone knows the answers, or can point me to where i can find them, i would be most grateful!
I'm not sure what the L is, but I believe the GT front swaybar is 20mm.
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Old 04-12-2007, 10:26 AM   #3
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I measured the L and it's 22mm with paint...so 20mm?
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Old 04-12-2007, 08:08 PM   #4
that one legacy
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sweetness, thanks for the replies guys! anyone with a later year BG Outback care to measure their front sway bar for me? preferably before saturday morning?
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Old 04-12-2007, 09:47 PM   #5
morrocco88
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I know for a fact that the GT is 20mm. Mine is a MY97, and I measured it with calipers. I also ordered some whiteline bushings for a 20mm bar, and they were a perfect fit!
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Old 04-12-2007, 10:49 PM   #6
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Quote:
Originally Posted by Wiscon_Mark View Post
I measured the L and it's 22mm with paint...so 20mm?
(a) Your measuring device isn't very accurate, and
(b) How frickin' thick do you think paint is?!

Pat Olsen
'97 Legacy 2.5GT sedan
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Old 04-12-2007, 11:12 PM   #7
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whenever i try to measure sway bar diameter i use wrenches......18,20,21 whatever. the outback and GT IIRC have a 18mm rear sway, but you can always get the whiteline adj. rear sway..goes up to 21 or 22 mm. i think its 18,20,22 adjustable. i know my stock rear sway was 15mm!!!!
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Old 04-12-2007, 11:54 PM   #8
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The GT doesn't have a 18mm sway in the rear. I think it's more like 16mm.
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Old 04-13-2007, 12:19 AM   #9
Wiscon_Mark
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Quote:
Originally Posted by Patrick Olsen View Post
(a) Your measuring device isn't very accurate, and
(b) How frickin' thick do you think paint is?!

Pat Olsen
'97 Legacy 2.5GT sedan
heh, you're probably right, but with all the rust/paint, I wasn't sure what the diameter was, you know it tends to flake out.

I didn't think the front bar was that thick, but I suppose it was possible...
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Old 04-13-2007, 12:56 AM   #10
that one legacy
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Originally Posted by morrocco88 View Post
I know for a fact that the GT is 20mm. Mine is a MY97, and I measured it with calipers. I also ordered some whiteline bushings for a 20mm bar, and they were a perfect fit!
hmm, well if mark's measurements are anywhere near accurate, it looks as if the GT and L have the same front sway, but the L has like a 14mm rear, the GT has a 16mm rear, and the outback has an 18mm rear.

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Old 04-13-2007, 01:40 AM   #11
ballitch
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so thats why our cars understeer....hmmm.....



~Josh~
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Old 04-13-2007, 01:45 AM   #12
that one legacy
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tell me about it. i remember not too long after i got my car, i went tearing through an empty parking lot just to see what it was capable of, and damn...even my old civic never understeered like that!
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Old 04-13-2007, 10:14 AM   #13
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Well, most Subaru owners don't want oversteer...understeer is much less dangerous for a driver who doesn't know what they're doing. It's much harder to induce oversteer in a Civic.
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Old 04-13-2007, 02:40 PM   #14
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Well, most Subaru owners don't want oversteer...understeer is much less dangerous for a driver who doesn't know what they're doing. It's much harder to induce oversteer in a Civic.
not in an automatic DX civic with a non vtec D15B7 it isn't. that car was understeer city!
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Old 04-14-2007, 02:59 AM   #15
that one legacy
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OKAY, may have finally found the answer.

according to prostreetonline, OEM bushings for the '95 Legacy L are for a 19mm bar: http://www.prostreetonline.com/oem/w...ay+Bar+Bushing

bushings for the '98 Outback are for a 20mm bar: http://www.prostreetonline.com/oem/w...ay+Bar+Bushing

and they don't list the size for a '98 GT, but we already know that's a 20 mm.

now the question is, is it worth paying another $50 just to get a 1mm thicker front sway bar?
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Old 04-14-2007, 04:04 AM   #16
ballitch
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nope......buy an aftermarket bar. or dont buy any bar at all.
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Old 04-14-2007, 02:42 PM   #17
that one legacy
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explain please...
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Old 04-14-2007, 06:17 PM   #18
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Quote:
Originally Posted by that one legacy View Post
hmm, well if mark's measurements are anywhere near accurate, it looks as if the GT and L have the same front sway, but the L has like a 14mm rear, the GT has a 16mm rear, and the outback has an 18mm rear.

The above is all correct.
I run a 22 front and 22 rear in my 99GT wagon. It's good.
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Old 04-14-2007, 11:18 PM   #19
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explain please...
It's not worth the upgrade to the GT. Look aftermarket, or just leave it.
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Old 04-15-2007, 01:51 AM   #20
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the reason i ask is that i upgraded to the 18mm Outback rear sway a few days ago, and now i'm searching for the ideal front counterpart.
Sorry to kind of threadjack but, did you notice any difference with the Outback RSB? Is your Legacy an L or GT? TIA
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Old 04-15-2007, 03:47 AM   #21
that one legacy
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Originally Posted by Wiscon_Mark View Post
It's not worth the upgrade to the GT. Look aftermarket, or just leave it.
what i'm looking for is if anyone has any concrete numbers on the spring rates (or torsion rates as it might be) between the 19mm L bar and the 20 mm GT/Outback bar. 1 mm might not seem like much, but it actually could make a significant difference depending upon the design of the bars themselves.
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Old 04-15-2007, 03:51 AM   #22
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Sorry to kind of threadjack but, did you notice any difference with the Outback RSB? Is your Legacy an L or GT? TIA
i actually do notice a very significant difference with the outback RSB on vs. my stock 14mm one. the turn-in is a lot crisper, the rear end used to feel like it was dragging along behind me when turning, but now i actually have to catch myself because the rear end rotates a lot better. i don't have any actual numbers or any scientific evidence to provide, but i can honestly say that the steering feels a lot better, and the suspension itself just feels more solid now. would it have been better to just go with a bigger aftermarket bar? maybe, but i'm not tracking this car, so i figured $50 for a 4mm increase in sway bar diameter was a good investment.

keep in mind though, that i am running on '04 STi springs and shocks, and have been desperately in need of an alignment for months now!

i think i am going to get that outback FSB just to see how it feels, see if maybe it'll make any discernable difference. after that, the next mod will be poly bushings all around, then i should notice a real difference.
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Old 04-16-2007, 06:28 PM   #23
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Quote:
Originally Posted by that one legacy View Post
what i'm looking for is if anyone has any concrete numbers on the spring rates (or torsion rates as it might be) between the 19mm L bar and the 20 mm GT/Outback bar. 1 mm might not seem like much, but it actually could make a significant difference depending upon the design of the bars themselves.
according to this chart it is 23% stiffer http://www.northursalia.com/techdocs/sway/sway.html

My wife never noticed when I put on the 22mm bars. I drive it in the snow like that too. No problem.
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Old 04-18-2007, 04:56 PM   #24
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Originally Posted by oncesir View Post
Sorry to kind of threadjack but, did you notice any difference with the Outback RSB? Is your Legacy an L or GT? TIA
After installing my Outback RSB my friend said it was the most fun he had had in a car in a long time. Reason was, was that after it had rained, I could powerslide through intersection turns like crazy. You get alot quicker response and definately go into oversteer more readily.
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