Hey all! I'm finally ready to upgrade the suspension on my 2013 AWD sedan but I'm suffering from information overload and could use some advice as to what to get and settings, etc.

So far I've got an Eibach rear sway, but that's it as far as upgrades go.

My goal is to have a reasonably plush daily driver that doesn't freak out when I corner aggressively. I don't like how the front end feels currently, like it's not sure what to do with itself. The back end feels pretty well planted I think. I don't care much about lowering the car although I may drop the front a little. I live in MN and need to keep the thing drivable in the winter. Plus I don't want to have to invest in the extra stuff that comes along with big drops. A secondary goal is to stop missing my humble 328xi so much.

So what would you fine people recommend for me? I'm thinking coilovers will help me out a lot (I like what I've read about Feal), but I have no idea which kind would be best for my moderate needs, or what settings to put them at once I get the brand sorted out. Would I benefit from a front sway bar upgrade too?

Any and all suggestions are welcome! Thanks in advance!!

 

I live in Texas so I never have to worry about snow but I’m dropped on Swift springs and KYB struts/ shocks and the undercarriage in the front of the car I would say maybe 5-6 inch clearance, so you will have issues in the snow with it and it’s something that you do not want to remove. Also front sway bar won’t do much since the oem is already really thick won’t make that big of a difference as opposed to the rear. But in your situation I would consider coil overs but with any suspension lowering I would highly suggest front and rear camber kits to stay in spec. I was running -2 when I dropped it in the front and I have no clue how some drive it like that, my car just felt like crap at top speeds and it kept drifting left and right. If I was you either do coil overs and change the height during the cold season/ summer season or keep it stock suspension and run wider tires for more grip and better handling.

 

I run -2° front and rear as well as almost zero toe. I don't have a problem with lane keeping. Granted the highest speed I see is about 110 mph on the longest straight at the track I run, so I can't comment on speeds above that.

 

If the car is a daily, avoid any of the cheap coilovers, they will rust away before St Paul finally plows the side streets.


When you say you don’t like the handling as it is now, what exactly are your symptoms?

 

Haha yeah the potential for winter rust is definitely a concern for me! Fortunately I've got the budget for a hopefully less rust-prone set. They only have to last for 5 years in any event.

The car corners competently enough, but the front end dips into it more than I like plus if the road surface isn't very good (like most road surfaces in MN), it feels.. uncomposed? like it's trying hard not to lose control.

Cornering is a lot better in the summer with my nice fat summer wheels (sport coupe 19x9 square setup) and tires (goodyear eagle F1s new last spring), but still not as solid as I'd ultimately like.

I'm not terribly interested in lowering the car much. Maybe half an inch at most. I'm hoping I can find a setup that won't require the extra alignment stuff to keep everything within spec.

I know I can never get the G to handle like my old humble BMW 328i, but it can be better than it is.

 

Subscribed.

I am in MN as well and am researching for the right coilover as well, with the rusting problem in mind. I have Hotchkis sways and am on the same path of upgrading wheels/tires and suspension.

 

Too stiff of a rear bar. The front is wallowing because excessive weight is being transferred to the front inside tire. This will cause a bit more scrub on that corner and every little bump will cause the chassis to twitch as it can’t figure out if it wants to oversteer or not.

I’d suggest backing off the rear bar to better mate to the stock front. Normally I’d say grab a balanced front bar with your rear, and stiffen up the springs. But, since I know the roads you are driving I’d say embrace the supple nature is the suspension.

You are still going to get some/tons body roll because the G37 was designed to be plush, and she is a fat girl, embrace that suck.

A few on this board have found just about the perfect rear bar for a X sedan is from the coupes or 370z Nismo. They are identified by being about 25.5mm in diameter and have a blue stripe on the middle jump as seen below. I picked mine up for $90 on eBay, but you could check with that G/Z chassis dismantler southwest of the TC. You can find their ads on CL. I’ve never used them in the past, but might be worth a shot.

Rear bar marking:






We we discussed a similar topic here:

https://www.myg37.com/forums/brakes-...awd-sedan.html

good luck.

 

Rear bars from the same model can have different color paint depending on the year. I don't know what exactly the colors mean. Different rate? Ease of matching for the assembly line?

 

different colors are different bar diameter/thickness. It’s so the individual on the assembly line grabs the right one for that specific build.


I have blue, confirmed at 25.5mm, from a 2016 370z Nismo. From my research, same as the IPL as well. Same bar as the all white Nismo bar available from the parts counter.

There is a lavender bar out there, same as the lower model 370z and G37 rwd sport/non sport sedans? Don’t know dimensions.

orange is the stock AWD bar and is 17mm.

I could be wrong but haven’t found people willing to grab a caliper and get an exact measurement and color of their bar. Would be an interesting database to comple to figure out cheap upgrade options since these cars are trickling to the more DIY crowd.

 

The rear bar off my sedan S had blue paint and it measured 25 mm. Could be 25.5 mm, my calipers are pretty cheesy and it was a couple of years ago that I measured it. So, again, paint could be rate or it could be for easy matching during factory assembly.

 

I run all season that might be why, but I'm always at 130-147 mph, and it gets pretty sketchy with -2. But after installing the front camber and rear camber it drives normal, and no issues at higher speeds.

 

I just reacently swapped out my rear sway on my 13 G37x coupe with an 370z rear sway and like you said the front seems like it’s completely confused did u ever find a solution to this problem ???

 

You're probably used to the car's understeer. Now, with the sway bar upgrade, the car should handle a bit more neutral.

 

Yes the car is more neutral but it’s hard to explain it’s something about the front end that just doesn’t seem natural, when I’m cornering now and I hit small bumps the steering wheel twitches

 

Hi

I just got BC Racing Coilvers for my G37X Sedan and i noticed a big difference in handling for the better id suggest getting coilovers