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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E30 (1982 - 1993)

E30 (1982 - 1993)
God's Chariot. The E30 was produced primarily from 1982 through 1991. The cabriolet was the one exception which was produced through 1993.

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  #1  
Old 04-28-2011, 07:34 PM
mlbryant8 mlbryant8 is offline
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strut tower brace question

have a vert and was thinking of ways to take out some of the body flex. Do strut tower braces really work? I have seen some cheap ones on ebay from China. Any input or experience with braces and opinions on the inexpensive ones would be greatly appreciated!
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  #2  
Old 04-28-2011, 07:53 PM
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the solid sparco style bars are nice if you can find one that fits your car. a proper strut bar will actually reduce flex. jack your car up on your front subframe and your strut towers will flex apart. mine flexed almost a 1/2" in the bronzit. with the IE sparco replica the strut towers didnt move at all.
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  #3  
Old 04-28-2011, 08:57 PM
markseven markseven is offline
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IE makes a rear shock mount brace as well, which should help.

Edit: Nevermind. Somehow I forgot you have a vert (senior moment).

Last edited by markseven; 04-28-2011 at 09:00 PM.
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  #4  
Old 04-28-2011, 11:23 PM
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As steve said the IE bars are nice, you will definately notice a difference, VAC also makes a rear subframe brace that bolts to the rear subframe brackets. That piece will also help increase the rigidity.
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  #5  
Old 04-29-2011, 03:57 AM
Burning2nd Burning2nd is offline
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Real strut tower braces have a threaded section to pull them together, these ones work great. the ones that are just a bar that goes across are just cosmetic .....

A cheap China one that has threads work just the same as the over priced polished ones

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  #6  
Old 04-29-2011, 04:19 AM
anstead610 anstead610 is offline
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Quote:
Originally Posted by Burning2nd View Post
Real strut tower braces have a threaded section to pull them together, these ones work great. the ones that are just a bar that goes across are just cosmetic .....

A cheap China one that has threads work just the same as the over priced polished ones

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Waitwut? So the Sparco bar is just cosmetic?...I don't think so..
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This e30 is now being parted out. NO body panels are for sale, bumpers/fenders/hood/mirrors/valance or front turn signals. Everything else is up for grabs. Euro grills/cluster are sold, suspension/brakes/LSD/rear tails are already spoken for.
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Old 04-29-2011, 06:56 AM
7pilot 7pilot is offline
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The threaded strut bars are not as rigid as a properly installed sparco.
The adjustability of the threaded ones is testament to how they can change dimension.

A really effective front strut bar would be one that triangulates back to the firewall with a plate behind the firewall.

m
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  #8  
Old 04-29-2011, 07:27 AM
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Quote:
Originally Posted by Burning2nd View Post
Real strut tower braces have a threaded section to pull them together, these ones work great. the ones that are just a bar that goes across are just cosmetic .....

A cheap China one that has threads work just the same as the over priced polished ones

you have no idea what your talking about. cheap china ones flex makign them purely cosmetic
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  #9  
Old 04-29-2011, 08:27 AM
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Quote:
Originally Posted by Burning2nd View Post
Real strut tower braces have a threaded section to pull them together, these ones work great. the ones that are just a bar that goes across are just cosmetic .....

A cheap China one that has threads work just the same as the over priced polished ones
Methinks you just like to toss out random opinions on anything and everything with little to no real understanding about how they work.
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Old 04-29-2011, 11:08 AM
mlbryant8 mlbryant8 is offline
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anybondy ever fabricate their own?
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  #11  
Old 04-29-2011, 11:19 AM
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A couple members on R3V have made rear strut bars.
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Old 04-29-2011, 12:32 PM
anstead610 anstead610 is offline
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A couple members on R3V have made rear strut bars.
Yup, White325is, I have one in my e30.
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  #13  
Old 04-29-2011, 01:22 PM
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fabricating a solid front bar is alot more difficult then the pre-school simple rear bars.


Quote:
Originally Posted by anstead610 View Post
Yup, White325is, I have one in my e30.
like 10 other members made them as well.

although they arent really bars made to take body roll away. they are mostly just to reinforce the metal of the shock tower.
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Old 04-29-2011, 01:25 PM
anstead610 anstead610 is offline
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Quote:
Originally Posted by fcsteve View Post
fabricating a solid front bar is alot more difficult then the pre-school simple rear bars.




like 10 other members made them as well.


although they arent really bars made to take body roll away. they are mostly just to reinforce the metal of the shock tower.
2 that I know of, White325is started making them first (that i have seen) and some other guy saw the crazy business he was doing and tried himself..but failed.
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This e30 is now being parted out. NO body panels are for sale, bumpers/fenders/hood/mirrors/valance or front turn signals. Everything else is up for grabs. Euro grills/cluster are sold, suspension/brakes/LSD/rear tails are already spoken for.
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  #15  
Old 04-29-2011, 01:46 PM
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Quote:
Originally Posted by anstead610 View Post
2 that I know of, White325is started making them first (that i have seen) and some other guy saw the crazy business he was doing and tried himself..but failed.
misc people have been selling them for years. mike was far from the first and i doubt he'll be even close to the last.

here is a guy back as far as 2007:

http://www.r3vlimited.com/board/show...rear+shock+bar
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Old 04-29-2011, 02:40 PM
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I bought a used on off the guy that sold me his tranny. Paid $10 and he made it himself at work (works at a machine shop) and ran it for couple months before parting the car. I'll put it in for ****s n giggles, doubt I'll feel any difference to be honest.
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Old 04-29-2011, 02:45 PM
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you wont feel a difference at all with a rear bar.
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  #18  
Old 04-29-2011, 03:06 PM
Burning2nd Burning2nd is offline
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Quote:
Originally Posted by Ryan... View Post
Methinks you just like to toss out random opinions on anything and everything with little to no real understanding about how they work.

yes i do and no your wrong...

Im quite understanding of how it works... lets just say Ive been around the track... I just don't choose to explain my self @ everyone who things you can read your way in to a engine


The threaded brace's are for applying pressure to chassis,
and same apply for lower tie bars.... the ones that just bolt, more so for general stiffing..


I just dont have the time to sit here and exsplain it all... idk what to say..
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Old 04-29-2011, 03:45 PM
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your not supposed to be bending your chassis with an adjustable bar.

they both do the exact same thing.

except 1 is adjustable in width(often the china ones) .. which is to allow them to be a universal fit onto any e30 vs fitting only the 1 or the other e30 strut tower width.

go ahead and explain your theory on how the more rigid, solid setup bars are cosmetic while the adjustable, often thin, flexible bars are structural ...
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  #20  
Old 04-30-2011, 06:25 AM
7pilot 7pilot is offline
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Originally Posted by Burning2nd View Post
yes i do and no your wrong...

Im quite understanding of how it works... lets just say Ive been around the track... I just don't choose to explain my self @ everyone who things you can read your way in to a engine


The threaded brace's are for applying pressure to chassis,
and same apply for lower tie bars.... the ones that just bolt, more so for general stiffing..


I just dont have the time to sit here and exsplain it all... idk what to say..
The stress bar is used to brace the U shaped engine bay by completing a box. the stress bar retains the dimension of the chassis. By boxing this part of the chassis, you eliminate body flex that is messing up the ability of the suspension to do its job properly.
Using screwed together lengths of pipe won't be rigid.....For the same reason that you don't see threaded sections in between sections of roll bar pipe in race/track cars.



m
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  #21  
Old 04-30-2011, 09:23 AM
markseven markseven is offline
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Quote:
Originally Posted by fcsteve View Post
you wont feel a difference at all with a rear bar.
Yeah, with the shock tower area having so much structure around it a brace will be unnoticeable. My car has something upward of 350K on the chassis so I put one on
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  #22  
Old 04-30-2011, 09:26 AM
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Quote:
Originally Posted by 7pilot View Post
The stress bar is used to brace the U shaped engine bay by completing a box. the stress bar retains the dimension of the chassis. By boxing this part of the chassis, you eliminate body flex that is messing up the ability of the suspension to do its job properly.
Using screwed together lengths of pipe won't be rigid.....For the same reason that you don't see threaded sections in between sections of roll bar pipe in race/track cars.
exactly. well said
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