Installed a HR rear sway Bar---what is bodyroll

vivid · 04-21-2008, 07:55 PM

that is added to my list of to do mods.

speed industry · 04-21-2008, 09:24 PM

Quote:

Originally Posted by coolguy

Hi Jan,

I have a quick q. when i was reading the HR installation sheet it says using the inner most holes provides the max tightness rate. Wondering if we used the inner holes or outerholes? Thanks!
It has been an awesome experiance:roundel:

I only saw one set of holes on the sway bar. Perhaps their instructions are generic to cover sway bars with multiple settings. Look at your photo above...only one hole :wink:

speed industry · 04-21-2008, 09:40 PM

Quote:

Originally Posted by Neo187H

I don't have the car in front of me to look but why not just undo the bolts holding the calipers and move the calipers rather than undo the brake fluid lines? Course its all said and done now but maybe for the next person.

No good..you'd have to have the car in front of you to understand why that won't work.

asv · 04-21-2008, 10:45 PM

I saw the layout of the rear sway when my car was on a lift for a spring install. It looked like an absolute bitch to get to.

Evolution Racewerks · 04-22-2008, 02:15 AM

Nice eye u got there. It is 12mm thick. I measured it with a dial caliper the first time I put it on the lift. At first I thought it was the brake line until I saw it connect to the end links.

Quote:

Originally Posted by speed industry

Accoring to H&R's website, their bar is 20mm. I didn't measure the stock one, but it appeared to be about 12-15 mm just eyeballing it. I took some photos, but I'll wait for the OP to post his..he may have the two next to each other for comparison.

mprhead5 · 04-22-2008, 05:21 AM

damn thats one tiny bar. Its sad that BMW decided comfort was more important than ballance, at least its an easy fix.

I hope its well ballanced for you.

speed industry · 04-22-2008, 06:07 AM

Quote:

Originally Posted by Evolution Racewerks

Nice eye u got there. It is 12mm thick. I measured it with a dial caliper the first time I put it on the lift. At first I thought it was the brake line until I saw it connect to the end links.

hehe..I can eyeball with the best of 'em

LOL at the brake line comment..

WAY · 04-22-2008, 08:24 PM

Quote:

Originally Posted by Evolution Racewerks

At first I thought it was the brake line until I saw it connect to the end links.

That's hilarious!

I hope to see more people's experience with different thicker bars before I jump on board...

aesthetect · 04-24-2008, 02:48 AM

Quote:

Originally Posted by coolguy

Quote:

And the difference wasn't as significant with the front sway bar?

Not really. I don't have the no's with me now but they were posted on this forum sometime back. similar to the 335coupe.

wait so this is with both sway bars replaced?

and also, is the daily ride noticeably stiffer?

coolguy · 04-24-2008, 03:14 PM

Quote:

Originally Posted by aesthetect

wait so this is with both sway bars replaced?

and also, is the daily ride noticeably stiffer?

I only replaced the rear one since the front oem bar doesn't look bad. I can't make out a diff in the stiffness of the ride except it is more firm when changing lanes or making abrupt turns.

deamon32 · 04-24-2008, 03:23 PM

Quote:

Originally Posted by aesthetect

and also, is the daily ride noticeably stiffer?

The ride should not get any stiffer with just sway bars. You will notice less body roll when cornering and changing lanes, the ride should also feel more "solid" at high speeds.

aesthetect · 04-24-2008, 06:07 PM

not substantially but it limits independent wheel travel. and i recall reading that bmw sacrificed rear sway bar thickness for improved ride comfort, i wouldn't have thought it would be that noticeable either - shoulda come from the factory this way.

Justin(OKC) · 04-24-2008, 09:09 PM

hmm, I'm subscribing to this thread for sure!!

Orb · 04-24-2008, 10:25 PM

Quote:

Originally Posted by coolguy

I have a macbookpro with me and I can't get my card to work with it. Ok I'll type now and update the pics asap. Regarding the rear sway bar i called everyone incl hotchkis, uuc and others. But only HR has them right now. They are not adjustable which is the downside.

The car drives a lot better now. Before i could notice the understeer n roll at 60mph. Last nite with no one around i tried to induce understeer by rapid lane changing and turning 90 degrees at traffic lights without dropping the speed. I would say the best couple of hundred bucks I have spent so far. I won't go as far as saying the understeer is eliminated totally but a lot better. I guess it'll be the best by also adding either kw3 or pss10 coilovers.

To put in a line, the 2 things i hate about the car are 1) tiniest rear swaybar 2) the exhaust with tons of dings created by bmw which restricts the free flow of the exhaust. The front BMW swaybar isn't bad at all and I have no plans of changing it.

Jan from Speedindustry swapped it for me. He is an awesome guy. It was more like a weekend saturday project for us and he answered all my silly q's and took very good care of my car. He is so friendly and I have found someone whom I can trust very much.

You may want to reconsider not doing the front bar and look at lesson learned over e90post. Not replacing the front bar is the same as adding the "stock rear bar+ HR rear bar) for stiffness. The 0.5 mm difference in the front is stiffer than the whole stock rear bar. Your car will be lean towards over steer now which means watch your ass if your not trail braking.

Orb

coolguy · 04-25-2008, 03:33 AM

Quote:

Originally Posted by Orb

You may want to reconsider not doing the front bar and look at lesson learned over e90post. Not replacing the front bar is like keeping the stock rear and the new bar for stiffness. The 0.5 mm difference in the front is stiffer than the whole stock rear bar. Your car will be lean towards over steer now which means watch your ass if your not trail braking.

Orb

A stupid q:biggrin:. Are you the same orb from e90post? I just ordered the front hr sway bar too after reading more about it:headbang: Thx for your input

imported_Monza · 04-25-2008, 12:29 PM

Quote:

Originally Posted by Orb

You may want to reconsider not doing the front bar and look at lesson learned over e90post. Not replacing the front bar is like keeping the stock rear and the new bar for stiffness. The 0.5 mm difference in the front is stiffer than the whole stock rear bar. Your car will be lean towards over steer now which means watch your ass if your not trail braking.

Orb

I am not trying to be an ass, but can you re-write your post so that makes sense please? I am interested in the info.

Orb · 04-25-2008, 05:38 PM

Quote:

Originally Posted by coolguy

A stupid q:biggrin:. Are you the same orb from e90post? I just ordered the front hr sway bar too after reading more about it:headbang: Thx for your input

Yes. :wink:

Orb

coolguy · 05-02-2008, 07:54 PM

Quote:

Originally Posted by Orb

Yes. :wink:

Orb

When i was turning hard with sudden accl, I noticed an inner side tire slippage(best way I can describe:smile

. This was only with the the HR rear sway bar installed. Today I got my front HR sway installed and I have to say the front sway bar really makes a difference. I have tried various things to induce the understeer and with both the swaybars, it really makes a diff. Thanks for your advise on the front sways.

Now I am waiting for a toon

Oregon · 05-03-2008, 02:04 AM

For those not particularly hip to mm, 12mm=.480, just under 1/2".

coolguy · 05-03-2008, 05:41 AM

Quote:

Originally Posted by Surname

For those not particularly hip to mm, 12mm=.480, just under 1/2".

When i had the rear sway replaced, I wasn't convinced about replacing the front one. I thought the OEM BMW front sway looked solid as compared to the rear. But I have been convinced even the 0.5 makes a difference. So here I am replacing both

. Unfortunately I couldn't take pics of the front sway bar installation

Red135 · 05-12-2008, 11:12 AM

Where did you get the sway bars?

coolguy · 05-12-2008, 03:51 PM

Quote:

Originally Posted by Red135

Where did you get the sway bars?

from tire rack:smile: ask for gill.

04-21-2008, 07:55 PM	#23
vivid Captain 40 Rep 822 Posts Drives: 135i, 323i Join Date: Mar 2005 Location: Atlanta, GA. iTrader: (0)	that is added to my list of to do mods. __________________ Current: 135i, 323i wagon. Sold:GTI Sold: FX45 Sold: E36 M3
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04-21-2008, 10:45 PM	#26
asv Captain 44 Rep 657 Posts Drives: 135i Join Date: Mar 2008 Location: PA iTrader: (0)	I saw the layout of the rear sway when my car was on a lift for a spring install. It looked like an absolute bitch to get to.
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04-22-2008, 05:21 AM	#28
mprhead5 Private First Class 9 Rep 146 Posts Drives: Join Date: Nov 2007 iTrader: (0)	damn thats one tiny bar. Its sad that BMW decided comfort was more important than ballance, at least its an easy fix. I hope its well ballanced for you.
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04-24-2008, 06:07 PM	#34
aesthetect form follows function 38 Rep 838 Posts Drives: GC impreza Join Date: Feb 2007 Location: austin tx iTrader: (0)	not substantially but it limits independent wheel travel. and i recall reading that bmw sacrificed rear sway bar thickness for improved ride comfort, i wouldn't have thought it would be that noticeable either - shoulda come from the factory this way.
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04-24-2008, 09:09 PM	#35
Justin(OKC) Major 77 Rep 1,376 Posts Drives: 1988 M3, 1990 M3, 1998 M3/4 Join Date: Oct 2006 Location: Oklahoma City, OK iTrader: (7) Garage List 1998 BMW M3/4 [10.00] 2011 BMW M3 Sedan [9.28] 1988 BMW M3 [9.40] 1990 BMW M3 [10.00] 2008 BMW 135i - sold [0.00] 2003 BMW M3 - sold [0.00]	hmm, I'm subscribing to this thread for sure!! __________________ 1988 BMW M3 - Hennarot/Black 1990 BMW M3 racecar - Diamond Schwarz/Black 1998 BMW M3 - Alpine White/Mulberry 2011 BMW 328i racecar - LeMans Blue/Black
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05-03-2008, 02:04 AM	#41
Oregon NRA Life Member, BMW CCA 30 year member 180 Rep 2,614 Posts Drives: 04' M3 Join Date: Aug 2007 Location: Oregon iTrader: (1) Garage List 1971 2002 [0.00] 2004 M3 [0.00] 2008 135i [0.00]	For those not particularly hip to mm, 12mm=.480, just under 1/2". __________________ Resigned 1ADDICTS Moderator “To disarm the people is the best and most effective way to enslave them.” – George Mason
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05-12-2008, 11:12 AM	#43
Red135 La Flama Blanca 27 Rep 1,545 Posts Drives: 1-series Join Date: Mar 2008 Location: Abq, NM iTrader: (1)	Where did you get the sway bars? __________________ AMS, Berk Technology, aFe, ER
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