Eibach Sway Bars
 

Hey guys, just wanted Eibach Sway Bar owner's input. What settings are you guys running and how does it feel? I originally wanted to run the soft setting in the front (700 lb/ft) and stiffest in the rear (860 lb/ft). I'm also considering full stiff (900 lb/ft front and 860 lb/ft rear) and middle (700, 740 rear). I just want to increase the rear rotation on the car thats why I was going with my initial soft/hard rear setup. I have Swift springs and Cusco strut brace if that makes a difference. Any input will be appreciated!

I run Hotchkis sway bars with SPL end links, front and rear. I have the rears set to medium and pre-loaded the tension with the end links. Combined with Swift Spec-R and Koni sport dampers set to firm front and 1 click below firm rear, rear rotation seems just about right. Turn-in is very snappy as well. Oh, and I run Michelin Pilot Super Sports as well which also I dramatically improves handling precision.

I am here to help.

I'm also running on Michelin Pilot Super Sports, I wonder what the ratings are on the Hotchkis compared to the Eibachs. I want it to rotate but im scared that if I put it on the stiffest setting front and back it might have understeer and even snappy oversteer when going on fast turns with minor bumps. At the same time if I go soft in the front and hardest in the back it might be too much understeer which would also slow down on corners. I dont want the car go get upset over little bumps either. Maybe soft front and medium rear? (730lb/ft front and 740 lb/ft rear)

You could try that setting as a start to see how it does.

I like the front a bit stiffer than the rear.

i usually do the initial setup in the rain. lower speed, easier to figure out where the car under or over steers.

I have the eibach sways. Full stiff in front.. Middle in rear. I like it so far on the streets. Also running Michelin PSS

Full stiff front and full soft rear. I like it.

This car (Z) needs the stiffest you can get up front.

:iagree:

Greetings, Mr. Mustang. :tiphat:

What I run, im thinking about trying full stiff on the back but I think she will rotate the way I want

Use the gas pedal to get the rear end to rotate, not the sway bar. I originally had mine set full stiff in the rear and the car was a handful. Once I went full soft of the rear (front was full stiff all along), the handling improved dramatically.

This.

I'd probably like the car a little more if I went back to the stock rear bar, but I'm too lazy to change it back. I'd do it if I had the front working even better (camber arms), but the stiff front bar alone makes a huge difference in dialing out a lot of the understeer.

I wonder if the car will be less predictable with the stiffer settings. Have you guys felt any change with the front being on 1 or 2?

:tup:

Set mine to stiffest on the front, middle on the rear. Very happy with the setup.

My review when installed is here: (page2)

http://www.the370z.com/brakes-suspen...-review-2.html

I have Eibach's set at soft on front and the middle in the rear at first they it seemed to over steer quite a bit when I was on lowering spring. Now on coils it is much less. I also have SPL front A arms, rear camber arms and SPL traction bars. The car seem to behave better once I went to coil overs. I think the best advice I hear over and over again is to change one thing at a time a see how it works. I know every time I add suspension upgrades and get alignment the car gets better. I figure I will start messing with the sway bars once I'm done with the suspension up grades. I got SPL upper and lower bushing and rear knuckle bushing to be installed some time in the next few weeks...then I will tune things a bit.

I also think we are all different to a degree in how drive and what we are comfortable with. Some like a tad of over steer as it can be controlled by a little braking, while other like a little under steer as it can be controlled by adding throttle. Most modern sport cars are setup for under steer because people when they panic tend to hit the brake!!!

Now you guys know why I only did the front kangaroo bar.

:icon17:

:tup:

I have the Hotchkis bars. The front is not adjustable. The rear has 2 holes. I have the rear set on soft, and it's still too much bar. It's tail happy at times. Was on 325 PSS's. Now have 345 PSS's on the rear. Hotchkis is suppose to be the stiffest bars. Thinking on switching back to the stock rear Nismo bar.

It seems you change the Eibach with Hotchkis because while reading your signature (your car mods) I couldn't find the Eibach there .. can you please summarize why? in fact I thought the Eibach will be a good choice for track and weekend not DD thu.

thanks and regards,
NASM

The 370's need the stiffest front sway bar you can find to improve the handling. The Hotchkis is just a stiffer bar than the Eibach.

There is no sway bar offered for our car that will make the ride quality so bad you wouldn't drive it on the street. The only reason mine doesn't see more street driving is the custom front splitter that would get damaged by many of the roads in my area.

Wow, a lot has changed since I made that post. Long story short stiffer is better up front and as stated above it will not impact driving on the street. The Z tends to under steer so a stiffer front bar helps to minimize that. Since that post I have added every SPL suspension part possible to my Z.

Sent from my SM-G965U using Tapatalk

Appreciate your reply Hotrodz.
And I guess you are using the stock one for the rear? Is that right? If yes, then, Have you ever tried using the softest setting on the rear bar? It might work ..
Well, I am trying to find out why people are not using the Hotchkis rear bar even with softest setting!!??

Sent from my SM-G980F using Tapatalk

I currently run no rear bar for track as it helps the car rotate better and which means better traction out of turns. Some run with a bar depending on their wheel and coilover setup. I may end up running the OEM bar to help balance out the effects of my aero setup once I can get her to the track and shake her down. Generally speaking no bar or a light rear bar is will improve track performance.

I was using Eibach front at soft and stock rear bar for few seasons. It is definitely better set up than stock(my lap times improved)..but car was a bit understeery. I tweaked front/ rear balance over the racing season, but behavior persisted.
Few months ago I put rear bar in too( I bought full Eibach set, but was reluctant to put rear one in because of feedback that car will become too tail happy)- on softest setting. I did not get chance to test it on the track, but on highway ramps car feels more eager to rotate and I really like the feeling.
Theres probably no simple answer- it will come down to how you like your car behavior and how will it interact with other components. If you can afford full kit- try it, and if it sucks- ditch it :)

Correction:-went in for spring cleaning-bar was on the middle setting. Geez, not sure how I survived driving in the winter!

Many thanks for sharing the experience.
Now the season of track here will be over by end of March. So, I will order mine later for next season and time attack competition.

Sent from my SM-G980F using Tapatalk

Thank you, true, will try both on and then will decide whether to keep both or only just front one.

Thanks,
Nasm

Sent from my SM-G980F using Tapatalk

Just installed their front bar on my car on the soft setting last week, stock rear bar. Wow what a difference. Car feels so much less nervous in corners, and turn in is really direct.

Didn't feel more understeer as mentioned above. My impression was it dialed in the front roll on turn in so it wasn't just leaning on the outside tire, which meant I had a better understanding of what the rear was doing.

I'd say a front bar is an absolute must for these cars. Cannot overstate how much better it drives.

I thought about getting bars from a Nismo. But after reading this thread I think I'm going with a front Eibach and stock rear bar to go with my Nismo suspension.

save your money?

I’ll ask here since it’s the most recent thread on the topic. What is it about this chassis that makes a stiffer front bar counteract under steer? With other cars I’ve worked on, and every bit of literature I’ve referenced, increasing rear stiffness increases oversteer, as does softening the front bar.

I’ve got a street-driven G37 coupe, and can’t figure out how to pick a sway bar upgrade. On previous projects, it’s been a no-brainer.

The front of our car is too soft in stock form

Too soft can result in less grip, just like too stiff.

As for what to pick, you could spend hours on theoretical sway bar effects. Or you can just try what track drivers with this chassis have done and run the stiffest bar available

If you find it does not suit you, just change get it. It’s a sway bar, it’s not a permanent move

The general concept of “softer end has more grip” is a broad generalization. If you had super soft rear springs for example, more weight would be transferred to the rear wheels, and is why Gran Turismo teaches people that this increase rear grip.
But in real life overly soft rear end that transfer too much weight too quickly to that end will lead to a loss of control just as an overly stiff rear spring would that prevents weigh transfer

It’s about reaching a certain baseline of stiffness, it just …being stiff or soft generally