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-   -   Boxing Control Arms...Worth It? (https://forums.turbobricks.com/showthread.php?t=352138)

propav8r 11-07-2019 11:01 AM

Boxing Control Arms...Worth It?
 
I've got the front and rear control arms off my 240 at the moment, and Yoshi's plates are only about $100 total.

Question for anyone that's done it...has it made a difference in handling or (especially in the back) do you view it more as an insurance policy against bending stuff under power?

JohnLane 11-07-2019 11:14 AM

Just do it. /thread.

blkaplan 11-07-2019 11:16 AM

I have never boxed the stock stuff but I know that putting my stiffer units on was a noticeable improvement so i would assume that boxing the stock stuff would probably be as well.

kyote 11-07-2019 11:25 AM

Boxing the back would be nice in conjunction with BNE's Spherical TABs.
As far as the front, if I popped a curb I'd rather replace a control arm than a crossmember or worse.

propav8r 11-07-2019 11:27 AM

Quote:

Originally Posted by JohnLane (Post 6012898)
Just do it. /thread.

That's what I needed to hear.

JohnMc 11-07-2019 11:31 AM

https://i0.wp.com/guyanainc.biz/wp-c...ize=1024%2C936

linuxman51 11-07-2019 12:05 PM

box or fabricate better ones for the rear.

Harlard 11-07-2019 12:07 PM

#boughtnotbuilt

https://shop.klracing.se/sv/artiklar...-special-.html

VB242 11-07-2019 12:19 PM

I did the front and back with 3/16" plate, overkill but it's what I had on hand. Definitely notice the difference.

JohnMc 11-07-2019 12:24 PM

Quote:

Originally Posted by linuxman51 (Post 6012921)
box or fabricate better ones for the rear.

I'm getting a few clunks out of the rear on mine already. And I already swapped the ovalized and shredded torque rods for IPD's with poly.

I'm guessing when I swap the 8.8 in I'll try to make everything stronger.

white855T 11-07-2019 12:30 PM

You can buy sheet metal home at home depot or ace hardware and just trace the pieces and cut them to size. You can make 2 pieces from one piece of sheet metal if you do the yoshifab style. If you do Volvo taxi style plate, it will require 2 pieces of sheet metal(still have to cut to size).

tjanson 11-07-2019 12:43 PM

When I slid into a curb during a parking lot snow hoon session, the impact to the front wheel bent my stock control arm. Would it have bent the unibody if it was boxed, or just bent up my wheel more? :e-shrug:

VB242 11-07-2019 01:41 PM

Quote:

Originally Posted by tjanson (Post 6012934)
When I slid into a curb during a parking lot snow hoon session, the impact to the front wheel bent my stock control arm. Would it have bent the unibody if it was boxed, or just bent up my wheel more? :e-shrug:

https://encrypted-tbn0.gstatic.com/i...KEIZCiUxsW3wjt

kyote 11-07-2019 03:24 PM

Quote:

Originally Posted by tjanson (Post 6012934)
When I slid into a curb during a parking lot snow hoon session, the impact to the front wheel bent my stock control arm. Would it have bent the unibody if it was boxed, or just bent up my wheel more? :e-shrug:

Tis my concern as well

kyote 11-07-2019 03:25 PM

Quote:

Originally Posted by Harlard (Post 6012923)

Installed a set on my brother's car last weekend.

Nice piece of kit, but no provision for swaybar, if you're in to that kinda thing.

Harlard 11-07-2019 03:27 PM

Quote:

Originally Posted by kyote (Post 6012984)
Installed a set on my brother's car last weekend.

Nice piece of kit, but no provision for swaybar, if you're in to that kinda thing.

I welded some stock brackets on. Better solution would be to weld some U bolts to the arm and a bracket to a removable piece of bar, as the end links want to be right on top of the ball joint.

propav8r 11-07-2019 03:27 PM

I generally try to avoid sliding into curbs. Where I'm at, there are precious few curbs anyway. Generally just mountainside dropoffs.

CAPT_BLOTTO 11-07-2019 03:52 PM

The rear ones bend pretty easily. I've bent them before. Now they're boxed.

tjanson 11-07-2019 04:17 PM

I wonder if the KL racing strut mounts are any good. You could pair them with their control arms for more camber and caster without switching to coilovers for spring clearance.

IF their strut mounts don't self destruct like all other stock replacement strut mounts.

https://shop.klracing.se/sv/artiklar...240-_260-.html

MikeSr. 11-07-2019 06:52 PM

I used the Yoshifab pieces.

IansPlatinum 11-07-2019 07:30 PM

Volvo offers taxi arms from gcp still. They're boxed but have a provision to allow folding. Idk how important folding really is, seeing how the 850 arms are solid steel.

The rears should be stiffer in theory, but will experience a lot more force if you are using poly bushings in the rear

culberro 11-07-2019 07:41 PM

Quote:

Originally Posted by tjanson (Post 6012995)
I wonder if the KL racing strut mounts are any good. You could pair them with their control arms for more camber and caster without switching to coilovers for spring clearance.

The KL arms and BNE Select strut mounts set to max caster make a 240 handle very very well (1.5deg neg camber and 7deg caster) . They really need delrin bushings front and rear to make them work well under heavy braking.

As far as boxing control arms...
For a DD: no real need unless your running big rubber up front, doing the occasional track day and really using your brakes. I have yet to fold/bend one at track days or drifting.
If your smashing rough roads: definitely box them.
KL Arms: I bent a set at a drift event. They’re now fully boxed, and now it destroys the rear control arm bushings if I hook a wheel on the inside curbing.

culberro 11-07-2019 07:42 PM

Quote:

Originally Posted by tjanson (Post 6012995)
I wonder if the KL racing strut mounts are any good. You could pair them with their control arms for more camber and caster without switching to coilovers for spring clearance.

The KL arms and BNE Select strut mounts set to max caster make a 240 handle very very well (1.5deg neg camber and 7deg caster) . They really need delrin bushings front and rear to make them work well under heavy braking.

As far as boxing control arms...
For a DD: no real need unless your running big rubber up front, doing the occasional track day and really using your brakes. I have yet to fold/bend one at track days or drifting.
If your smashing rough roads: definitely box them.
KL Arms: I bent a set at a drift event. They’re now fully boxed, and now it destroys the rear control arm bushings if I hook a wheel on the inside curbing.

Rear trailing arms should be reinforced if you’re giving it the beans.

Harlard 11-07-2019 08:20 PM

Quote:

Originally Posted by culberro (Post 6013044)
The KL arms and BNE Select strut mounts set to max caster make a 240 handle very very well (1.5deg neg camber and 7deg caster) . They really need delrin bushings front and rear to make them work well under heavy braking.

My setup. It's so so so so good.

Tfrasca 11-07-2019 08:38 PM

Not a direct comparison, but my 142 rear trailing arms were starting to bend a bit. A simple strip of 1/8" steel stitch welded on there stopped the bending.

2turbotoys 11-07-2019 09:07 PM

Here is some more good info on this subject, I was curious which way they break and got some great replies.

https://forums.turbobricks.com/showthread.php?t=346633

stick70 11-08-2019 10:46 AM

Quote:

Originally Posted by Harlard (Post 6013052)
My setup. It's so so so so good.

I need to get on this control arm game. I'm stuck at -1.7 and 3.9.

kyote 11-08-2019 11:09 AM

Quote:

Originally Posted by culberro (Post 6013042)
The KL arms and BNE Select strut mounts set to max caster make a 240 handle very very well (1.5deg neg camber and 7deg caster) . They really need delrin bushings front and rear to make them work well under heavy braking.

As far as boxing control arms...
For a DD: no real need unless your running big rubber up front, doing the occasional track day and really using your brakes. I have yet to fold/bend one at track days or drifting.
If your smashing rough roads: definitely box them.
KL Arms: I bent a set at a drift event. They’re now fully boxed, and now it destroys the rear control arm bushings if I hook a wheel on the inside curbing.

On Shane's lifty boi it brought it from positive camber to roughly zero, maybe a little negative. (KL Racing Arms and BNE select mounting plates)

Still needs a non-tape measure alignment to verify :rofl:

IansPlatinum 11-08-2019 11:16 AM

Quote:

Originally Posted by kyote (Post 6013155)
On Shane's lifty boi it brought it from positive camber to roughly zero, maybe a little negative. (KL Racing Arms and BNE select mounting plates)

Still needs a non-tape measure alignment to verify :rofl:

pics of lifty boi?

blkaplan 11-08-2019 11:53 AM

ill be able to offer control arms again soon as well. Cant wait for my new purchase to show up

kyote 11-08-2019 12:36 PM

Quote:

Originally Posted by IansPlatinum (Post 6013157)
pics of lifty boi?

Google "Lifted Volvo 240", its the first result ;-)

GreatDaneShane 11-08-2019 08:59 PM

https://imgur.com/gallery/u4ROSam

Here's some pictures of the lifty boi/tallvo/cucaracha

Hank Scorpio 11-11-2019 03:22 PM

I saw Ryan’s 240 back in the day crack and break a control arm while backing into a parking spot at burger ball. Could be bad luck but seems like an easy upgrade to make.

towerymt 11-13-2019 12:24 PM

Volvo version, probably still gives the unibody a chance.
https://pbase.com/towerymt/image/93291311.jpg

24hr Lemons version...we ran spacers to move the ball joint out about an inch to give -3'ish degrees of camber while still using the stock upper strut mounts. Found this ripped apart before a race. These were box'd using Yoshifab plates, but it doesn't really extend to the end, and the plate was clearanced (poorly) for the bolts holding the ball joint to the spacer.

https://pbase.com/towerymt/image/161732864.jpg

Probably should have welded a piece across the underside of the arm, out near the end.

https://pbase.com/towerymt/image/160231672.jpg

pat244ti 11-13-2019 01:01 PM

Both my race cars have them - the road race car uses the Yoshifab stuff while my rally car has Alfalfa rallysport specials [a bit beefier than Yoshifab]

Both have been doing the job just fine for their respective applications.


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