Quote:
|
Quote:
The tire sidewall is going to start to roll over more with the increased load and then you still end up sliding more. Most sway bars on the market increase the roll stiffness by over 20%, in some cases as much as 100%. This is most likely greater than going up a spring rate compared to the oem springs. At this point its really up to the driver how they manage tire heat. with increased roll stiffness you will be heating the outer tire significantly more. |
Quote:
|
Quote:
It's directly proportional to how stiff the bar is compared to the spring rate and corner weight. Its all guess work unless the manufacturer of the asb states exactly how much force it takes to bend the bar, which absolutely no one does. At max, some companies may give you a percentage compared to oem. If you get a bar that has a greater resistance to bending than the spring rate, you may end up exerting too much force on the tires. This again goes back to the level of grip the tires can make. You may reduce the sensation of roll, but this doesn't garranty more grip. Where it may give an increased level of force to overcome traction loss, you run the risk of overloading the tire at the limit and having a sudden loss of traction when the tire lets go, compared to a gradual loss of traction. I personally wouldn't do this change alone unless i have a tire that can support a higher load rating. Presumably double that of the corner weight. But i think we all can agree, the first modification to ever be done is tires. Only then should you decide to change the ASB and/or spring rate. |
Quote:
|
I always come back to this thread when trying to understand sway bar stiffness on the Z.
I found this today that seems directly related to the conversation. From the pages of High Performance Handling Handbook by Don Alexander: "There are situations where increasing the stiffness of an anti-roll bar will have the opposite effect. Most stock vehicles have excessive understeer because it is easier to control and provides more stability for the average driver than a vehicle that oversteers. A big part of this comes from excessive body roll, which induces too much camber change, and a good portion of the front tire contact patches loses contact with the road. In this instance, adding a stiffer front anti-roll bar, which would typically increase the extreme understeer, actually reduces the understeer by reducing the body roll-induced camber change. The front tires now stay in better contact with the road surface, creating more traction and reducing understeer." |
Good find!! I’m a nerd for learning more about suspension geometry and race car chassis setups so I love this stuff.
Found the post that explains this well. j-rho explains it better than me. See his post here: http://www.the370z.com/3023040-post10.html It’s not that a front bar gives more grip… a stiffer bar actually asks MORE of the outside loaded tires… but the tire is kept in a better range of the camber curve which outweighs the increased load, and therefore more grip! |
Quote:
Also, driving a simulator nearly daily, I fiddled around with various setups and if there isn't any change to the spring rates and dampers, if you leave everything stock, and if the car is understeer prone, the easiest way to remedy it quickly is to stiffen the rear ARB. |
Quote:
|
Quote:
|
Hotchkiss sway bar on the front. If you are square. You can eliminate the rear bar. If stagger, use a rear bar.
|
Quote:
|
I fitted a front whiteline sway bar with 2 settings, swift springs oem shocks oem 19" tyre sizes and Michelin Piot 4S tyres.
I asked whiteline how much stiffer over oem and soft is approx 30% and hard is 65% I tried the hard setting and the car just wanted to understeer too much. Simple test was perform quick U turn, hit the gas trying to spin the car around and it just understeered. I simply cannot understand how some run the much stiffer bars up front 100-130% stiffer whatever it is. Just tells me majority simply do not drive the cars hard enough (which is fine) so all they are feeling is the stiffer setup and less roll, but if actually drove the car agressivly they would end up pushing. |
Quote:
Spot on. If you do the same test you mentioned with a stiff rear sway, your *** will be overtaking you immediately. |
The stiff front sway bar was tested by Doren Racing. When they ran a 370RC in the Pirelli Cup. Their race driver was a member on here. Dwnshift, pro driver. And others have proven that it works. I, for one. I'm a Class C driver.
|
Quote:
|
This is probably the best explanation of sway bar impact on a normal car:
https://www.youtube.com/watch?v=NFGkZNrNTIE&t=12m16s (annotated to the main point at 12min 16sec, no need to watch it all, but I recommend) |
I always love when this topic comes up from an entertainment standpoint although this time, I'll just sit back and not feed the trolls. :drama:
|
Quote:
Quote:
|
https://youtu.be/H7uALgGvXvw?t=692
https://youtu.be/H7uALgGvXvw?t=824 he's running 14k 6k(true) he was running hotchkiss front and rear, going back to oem rear. |
Quote:
Good for you for testing the sway bars for yourself and not assuming everything you see on these forums is correct. Most car info online is incorrect nowadays… although the tips and tricks from OG members on here is usually safe to trust! I’m in the process of figuring out my sway bar setup for myself. Hotchis rear bar felt too stiff, running a few autox events without it. Will probably go back to OEM rear bar Sent from my iPhone using Tapatalk |
Quote:
|
Quote:
With stock nonadjustable arms, you’re understeering |
Quote:
With my setup I was running Swift springs in front which naturally brought the front camber to -1.5. It still understeered untill I went from stiffest to softest on the whiteline bar |
Ok hold on
You’re gonna modify your car for handling But you’re doing a sway bar and NOT adjustable arms? This kinda undermines your experience doesn’t it? Any that gives a **** about the effect of a sway bar should be at least optimizing front camber through alignment Everyone that does regular track driving here is running around 3 degrees of camber The stock alignment is WOEFULLY conservative The reason why a stiff front bar can actually improve front grip is because the front suspension is so soft from the factory it needs the stiffer bar AND camber to stay planted You’re bringing an amateur setup to this discussion and surprised your experience differs from others? |
No, Who is talking about Track setups? I'm not and the OP asked if the stiff front bar is good for any situation or only track and there are responses like "It's good for any situation when you turn your car hard" I chimed in with my experience focusing on street setup, good street tyres and using a firm setting on my bar no where as stiff as most that get reccomended on here and it seems to have upset the track junkies on here.
I do not need adjustable arms up front, the springs alone got me to -1.5 which was good enough at the time and since adding Koni yellows and replacing all the bushes in the FUCA incuding a double offset for the inner, this has gained me another -0.5 of camber so I am running -2.0 up front which is plenty for my agressive targa tarmac style of driving that I do. Youtube Targa Tasmania and watch some clips. There is a reason participants are warned to leave their circuit racing mentality at the door. Track and Street racing are completly different and a stiff setup is the last thing you want unless you want to end up in a ditch. |
Quote:
|
Quote:
|
Quote:
Street racing isn’t condoned here, and for normal daily driving who gives a **** about sway bar balance? At normal speeds, it doesn’t matter, you aren’t getting groceries any quicker. A good coilovers setup won’t be “overly stiff” - the whole ******* point of spending money on coilovers to get adjustable height and damping AND better quality springs and dampers which are matched to each other AND YOUR INTENDED DRIVING STYLE. if you don’t know how to pick a good coilovers, there should be a suspension shop or manufacturer competent enough to do it for you Adjusting camber with bushings and drop springs isn’t adjusting camber at all, you’re just randomly getting whatever spec is the side effect of lowering the car. An adjustable front arm, specifically the SPL one, isn’t a “stiff setup’, it doesn’t affect stiffness at all. Maybe more feedback front replacing a bushing that may be worn, and going from rubber to metal, but the point is to be able to set your camber or caster to whatever you need. Furthermore, the original post is from 2017. This thread has very clearly turned in a more track oriented discussion, YOU decided to weigh in with a perspective clearly limited in understanding of how suspension parts work and your own limitations as a driver If you really think slapping a stiff front bar will suddenly turn your car into a death machin with snap oversteer, you’re just telling us you can’t ******* or are putting your self in suboptimal positions on purpose |
For **** and giggles I looked up Targa Tasmania. Guess how they describe themselves?
With a proud history dating back to 1992, our reputation has been built on our ability to deliver high quality, professional tarmac rally events and driving experiences in unique and iconic Australian destinations. TARGA gives you closed roads, greater distance and an extraordinary sense of achievement. We bring energy and excitement to everything we do, and consistently meet all required international safety standards. We show the utmost respect to our people, partners and customers and don’t compromise on this, no matter what. TARGA deliver both competitive races and non-competitive touring events, sanctioned by Australia’s peak motor racing authority Motorsport Australia. TARGA includes tarmac rally events in Victoria’s High Country, Cairns in Far North Queensland and the longest and hardest tarmac rally in the world, in Tasmania. So the thing you cite is….a racing authority that runs closed road events? And from YouTube videos, it sure looks like it has a shitload of high end cars that are running better than your lowering spring and bushing setup. |
Love how OptionZero comes in with her renowned people skills and queefs a vagload of dumbass all over the thread.
|
fwiw
I think adding a hotchkiss front bar for my recent track days did not help understeer at all. I need more track days with some different bar setups to really tell for sure. But with stock tires, stock suspension and a hotchkiss front bar: The car was incredibly understeer prone. Don't think the back stepped out once. This could be explained away by driver error. BUUUT. Sway bars are not expensive, and not hard to swap. So might as well have a couple different sets. Obviously we know from all the actual track drivers, it's a much different story on track with proper track alignment. But if I was building a car for daily canyon driving, on softish springs and PS4S. I think I would end up with a more balanced set of sway bars. |
Quote:
|
Quote:
Front Camber -2, Caster +6, Toe in 1/16" Rear Camber -1.75, Toe in 1'16". Over the years. I've tried about 20+ alignment settings. |
Quote:
|
Quote:
More tire and more camber is the solution No sway bar is gonna fix the issue |
Quote:
|
Quote:
|
Quote:
Oh and you say I am limited in understanding of how suspension parts work? Which you followed up with a dumb statement like Quote:
Quote:
Your ignorance and attitude is not worth anymore of my time on this discussion. Good day to you. |
Quote:
|
All times are GMT -5. The time now is 06:51 PM. |
Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 PL2