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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Thu, Dec-23-2010, 07:17:42 AM   #11
Toxic0n
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Default Re: Effectiveness of a rear strut bar...any?

I don't know about the M3 but in my 328i the rear strut bar made zero difference. It looked cool though
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Old Thu, Dec-23-2010, 03:39:17 PM   #12
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Default Re: Effectiveness of a rear strut bar...any?

Quote:
Originally Posted by PerkM3 View Post
From what I've seen/read theirs is the best.
If you can keep the rolling box =[chassis] in square, whilst under G loading
the proper/correct suspension settings can be maintained
resulting = better car control,tire footprint,braking,etc
BMW stamped steel spot welded chassis does flex/wiggle under load
tower bars front and rear and lower do help to direct proper load paths
preventing suspension hard pick up point/node failure
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Old Mon, Jan-03-2011, 10:11:47 PM   #13
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Default Re: Effectiveness of a rear strut bar...any?

Thanks everyone for the useful information. If I can find a bar with a removable section that's cheap, I will get one to complement I get the upcoming coilovers.

Otherwise, I will just get reinforced mounts.
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Old Tue, Jan-04-2011, 12:16:30 AM   #14
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Default Re: Effectiveness of a rear strut bar...any?

unless its welded onto the rear shock towers and the subframe, it will do absolutely nothing
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Old Tue, Jan-04-2011, 12:25:21 AM   #15
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Default Re: Effectiveness of a rear strut bar...any?

Interesting statement IHatePosers, so would this theory also apply to the front OEM bar?
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Old Tue, Jan-04-2011, 12:26:47 AM   #16
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Default Re: Effectiveness of a rear strut bar...any?

I think the rear deck would start cracking before that bar even got any weight to it. I mean think about it they would have to make it a extremely tight fit like perfect for it to help at all in that section.
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Old Tue, Jan-04-2011, 12:33:02 AM   #17
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Default Re: Effectiveness of a rear strut bar...any?

I agree and that was one of my motivations to ask the forum. If I had a convertible...maybe. Not sure if the shell of a coupe would flex that much, but I've not owned one and want to make sure I don't if there's not clear added value for my goal of better handling.
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Old Tue, Jan-04-2011, 12:33:39 AM   #18
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Default Re: Effectiveness of a rear strut bar...any?

I don't see it doing that much since the springs are mounted in a different spot and thats where most of the forces are applied
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Old Tue, Jan-04-2011, 12:40:16 AM   #19
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Default Re: Effectiveness of a rear strut bar...any?

And your sub frame would take a dump even before it flexed that much

If it needed it im sure M Technik would have added it to the design. Like the 350z has one built in.
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Old Tue, Jan-04-2011, 09:36:54 AM   #20
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Default Re: Effectiveness of a rear strut bar...any?

A rear strut bar will make a difference in the handling of the vehicle. But the ability to notice the change is based on your driving style and the type of driving. The suspension mods also affect how much rear strut bar's stiffening is noticed.

As for AUTOX, it depends on driving style. Some people like to have the rear of car rotate quickly. Some don't. The strut bars for our cars is to keep the shock towers from flexing. (in most cases collapsing in under load)

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And your sub frame would take a dump even before it flexed that much

If it needed it im sure M Technik would have added it to the design. Like the 350z has one built in.
Not necessarily true. It might have been left out so that the normal owner could use their trunk. A lot of cars don't come with them but can have their handling improved with their addition.
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Discussing Effectiveness of a rear strut bar...any? in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)