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      04-20-2018, 01:01 PM   #1
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Sway bar

Anyone upgraded their Sway bar? Not a big fan of the mid corner rolling but I think the suspension stiffness is spot on.
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      04-20-2018, 01:16 PM   #2
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Quote:
Originally Posted by SkylineGT View Post
Anyone upgraded their Sway bar? Not a big fan of the mid corner rolling but I think the suspension stiffness is spot on.
Probably want an anti-sway bar instead!

A thicker antisway bar will tend to slap the wheel back down a bit more on rough roads although probably minimal....I was just reacting to "spot on", so you might feel some difference.
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      04-24-2018, 12:40 PM   #3
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Quote:
Originally Posted by Sportstick View Post
Probably want an anti-sway bar instead!

A thicker antisway bar will tend to slap the wheel back down a bit more on rough roads although probably minimal....I was just reacting to "spot on", so you might feel some difference.
Anti sway lol, just found out no company does anti sway bar for the F34, guess that's not happening soon.
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      04-24-2018, 12:53 PM   #4
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You are looking for stiffer springs and dampers.
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      04-24-2018, 01:32 PM   #5
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Quote:
Originally Posted by SkylineGT View Post
Anti sway lol, just found out no company does anti sway bar for the F34, guess that's not happening soon.
https://suspension-shop.com/h-r-anti...plete-kit.html

http://srbpower.com/products/h-r-ant...e-10-11-1.html

May find a more convenient seller, but it's out there.....

BTW, "Skyline".....love the chili!
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      04-27-2018, 08:06 AM   #6
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Agreed. Look for coilovers/spring set.
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      04-27-2018, 08:20 AM   #7
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Quote:
Originally Posted by BMWILUVU View Post
You are looking for stiffer springs and dampers.
Quote:
Originally Posted by Tribalpinoy911 View Post
Agreed. Look for coilovers/spring set.
How do you reach this conclusion when the OP says suspension stiffness is already "spot on"?
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      04-27-2018, 08:34 AM   #8
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Quote:
Originally Posted by Sportstick View Post
How do you reach this conclusion when the OP says suspension stiffness is already "spot on"?
335 has soft springs and dampers. Sway bar does not change that. Sway bar should be upgraded after springs, dampers, lowering or at minimum considered and tuned together.
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      04-27-2018, 08:42 AM   #9
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Quote:
Originally Posted by BMWILUVU View Post
335 has soft springs and dampers. Sway bar does not change that. Sway bar should be upgraded after springs, dampers, lowering or at minimum considered and tuned together.
The OP apparently likes the soft springs and dampers just as they are...said the stiffness is correct for him as is....just wants to reduce roll. Ideally, all components should be calibrated as a system, but he is not asking to make any of the other changes which would affect ride comfort...just wants to potentially benefit from an anti-sway bar upgrade (which will have much less deteriorating effect on ride comfort for him as it more strongly resists displacement on rough/broken road surfaces).
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      04-27-2018, 08:49 AM   #10
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Quote:
Originally Posted by Sportstick View Post
The OP apparently likes the soft springs and dampers just as they are...said the stiffness is correct for him as is....just wants to reduce roll. Ideally, all components should be calibrated as a system, but he is not asking to make any of the other changes which would affect ride comfort...just wants to potentially benefit from an anti-sway bar upgrade (which will have much less deteriorating effect on ride comfort for him as it more strongly resists displacement on rough/broken road surfaces).
If the OP is concerned about ride quality, I would not recommend a stiffer sway bar. You would feel the bumps in the road from both sides even more.
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      04-27-2018, 09:57 AM   #11
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Quote:
Originally Posted by BMWILUVU View Post
If the OP is concerned about ride quality, I would not recommend a stiffer sway bar. You would feel the bumps in the road from both sides even more.
Exactly right, but it becomes a matter of degree/lesser of evils....tolerate the roll, stiffen springs/struts, thicken antisway bar....which gets him closest to his goal without deteriorating what he already likes...the ride.
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      05-07-2018, 09:18 AM   #12
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Quote:
Originally Posted by Sportstick View Post
https://suspension-shop.com/h-r-anti...plete-kit.html

http://srbpower.com/products/h-r-ant...e-10-11-1.html

May find a more convenient seller, but it's out there.....

BTW, "Skyline".....love the chili!
Thanks, my other car is a r32 hence the skyline name.
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      05-07-2018, 09:19 AM   #13
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Quote:
Originally Posted by BMWILUVU View Post
If the OP is concerned about ride quality, I would not recommend a stiffer sway bar. You would feel the bumps in the road from both sides even more.
I guess there might be a trade off there, I'll do the tune first and then see if the body can handle it.
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      05-07-2018, 09:51 AM   #14
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Thanks, my other car is a r32 hence the skyline name.
LOL....in Cincinnati, as you likely know, that name has a more popular meaning!
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      05-07-2018, 02:59 PM   #15
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Quote:
Originally Posted by Sportstick View Post
Exactly right, but it becomes a matter of degree/lesser of evils....tolerate the roll, stiffen springs/struts, thicken antisway bar....which gets him closest to his goal without deteriorating what he already likes...the ride.
To lessen roll the first thing you do is use stiffer springs. The first thing that suffers when you do is the ride. You can have a comfortable ride or you can have minimal body roll. Comfortable ride and minimal body roll isn't an option. If the OP was adding anti-sway to a car that wasn't equipped with them it might help, but just beefing up the stock anti-sway probably won't.
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      05-07-2018, 04:45 PM   #16
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Quote:
Originally Posted by Billfitz View Post
To lessen roll the first thing you do is use stiffer springs. The first thing that suffers when you do is the ride. You can have a comfortable ride or you can have minimal body roll. Comfortable ride and minimal body roll isn't an option. If the OP was adding anti-sway to a car that wasn't equipped with them it might help, but just beefing up the stock anti-sway probably won't.
If ride comfort isn't an issue, your path makes very good sense. I faced a similar situation with a W204 chassis Mercedes C Class. I didn't want to play with springs/struts for the same reason as the OP. I did install a set of Eibach thicker anti-sway bars. There was a very slightly noticeable increased "snap back" on broken pavement, but generally, the ride quality did not deteriorate on the minute displacements on reasonable/good quality pavement, as the anti-sway bar did not seem to react with much force. If the OP wants to try anything at all, given his priorities, I would still try the bars before anything more intrusive. If that turns out to be too much, the springs/struts would certainly be moreso.
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Last edited by Sportstick; 05-07-2018 at 04:57 PM..
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      05-08-2018, 09:00 PM   #17
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Quote:
Originally Posted by SkylineGT View Post
I guess there might be a trade off there, I'll do the tune first and then see if the body can handle it.
You will always be trading-off factors. Ideally all the components should be tuned together. BMW does this on the Nurburgring with its new cars albeit with a certain dynamic in mind which may not be suitable for every single driver. Chassis-Sways-Springs-Dampers-Tires. The F30 already has admirable chassis stiffness so it is already there. If you stiffen sways-springs to the max, you will roll alot less but be putting alot of pressure and therefore heat on the tires on the corners. I am of course talking about severe driving/track dynamics but the point is these are all components which should be tuned together.
The 335 does have a bit more bounce in it and the LCI solves that a bit by employing stiffer dampers. The springs are the same.
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      05-15-2018, 10:31 AM   #18
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LOL....in Cincinnati, as you likely know, that name has a more popular meaning!
Yeah, first time I moved here I thought cheese were free in Ohio.
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      05-15-2018, 10:33 AM   #19
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Quote:
Originally Posted by BMWILUVU View Post
You will always be trading-off factors. Ideally all the components should be tuned together. BMW does this on the Nurburgring with its new cars albeit with a certain dynamic in mind which may not be suitable for every single driver. Chassis-Sways-Springs-Dampers-Tires. The F30 already has admirable chassis stiffness so it is already there. If you stiffen sways-springs to the max, you will roll alot less but be putting alot of pressure and therefore heat on the tires on the corners. I am of course talking about severe driving/track dynamics but the point is these are all components which should be tuned together.
The 335 does have a bit more bounce in it and the LCI solves that a bit by employing stiffer dampers. The springs are the same.
Right, I actually hate it that they didn't change the spring, they smash more due to softer damper.
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      05-15-2018, 10:35 AM   #20
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Thanks very much for all your help! Ironically, I found the soft feeling to be the comfortable seat, dealer give me a 330 loaner car with sport seat and it felt completely different when you don't bounce around in the cabin! 330 is not necessarily a much more stiffer car.
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