Why is it better to mount the sway bar to the strut rather than the control arm? Are adjustable end links the only reason?
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I'm not 100% sure but I've heard that it also has to do with positioning. The control arm mount doesn't have the same direct correlation to suspension travel like the strut does and has more potential flex as well. Example would be that the strut could compress upwards by 4", but between the control arm mount point might only be 3" (made up numbers) due to flex and position. There was also something about as the struts are turned/rotated but I don't remember the details on it or what the effect was.1990 332i, 4 door
2008 KTM 990 Superduke
2018 Golf R, 6spd manual (Pending delivery)
2017 Mazda CX-5 GT
2007 Z4M Coupe - Sold to very nice people
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Yeah, motion ratio is a good reason- the stock location (non-M)
is closer to 2:1. That means that for the same effect, you have to have
a 4- times- stiffer bar, which is a lot heavier and any compliance or slack is also multiplied.
Plus, I guess, it adds stress to the ball joints in the vertical direction.
The strut mount does move the bar when the wheels turn, but in theory, both
ends move a similar distance, so it cancels...
What I got,
tnow, sometimes I just mess with people. It's more entertaining that way. george graves
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It's all about motion ratios. Since the strut tube mount is outboard relative to the control arm mounts, the swaybar must twist more for the same amount of independent suspension travel. Even though the ends of the swaybar don't change position laterally at all, they are directly attached to the strut tube and thus move the same distance as it does, the result is an increase in wheel rate for the same spring rate.
IG @turbovarg
'91 318is, M20 turbo
[CoTM: 4-18]
'94 525iT slicktop, M50B30 + S362SX-E, 600WHP DD or bust - updated 3-17
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This is one of the best bang-for-the-buck mods we've done, especially since E34 swaybar endlinks were $13/pair from FCPeuro and the tabs are $15 from AKG. But the results as far as reduced body roll and improved handling were noticeable.
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If the effective ratio is 2:1, as Toby says
a lot of front roll resistance to keep the camber curve in check.
a lot more than a real (racing) suspension does...
tnow, sometimes I just mess with people. It's more entertaining that way. george graves
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When pushed to the limit m3 e30s lift the inside front wheel, I'll be sticking with standard mounting position and eventually a 22mm sway. If insane stiffness is what you are after IE makes a hollow 25mm, addco makes a solid one incher.From what I've gathered both are overkill, and it seems that stanced cars are the ones binding at the links.
I crunched numbers and the ie hollow should be ~166% the stiffness of the 22mm most people use, the addco bar ~177% stiffness of the 22mm. This is if the materials used are apples to apples in terms of metal used.Jah bless! :pimp:
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Originally posted by Streichholzschächtelchen View PostWhen pushed to the limit m3 e30s lift the inside front wheel, I'll be sticking with standard mounting position and eventually a 22mm sway.
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Originally posted by straight6pwr View Postupgrading to a 22/23mm bar -or- moving the mounting tabs to the strut and leave the stock bar both accomplish the same thing. your comment suggests you think your way is better. for someone who can weld, or can get it done by a friend, moving the mounting tabs is a lot more $$ friendly. $30 versus $190+I Timothy 2:1-2
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