[HighlandPete]

Originally Posted by Ennoch

The thing I find interesting is that, regardless of how harsh some RFT's are, people are desperate to get rid of them for ride but then put effort into replacing bushes to improve turn in and steering feel. I mean sure, RFT's have their downsides but they have stiff sidewalls and good turn in despite that.

I find this strange as well, as if every RFT is a problem. We have wheel setups where a RFT will be as soft riding as using some UHP tires.

[Ennoch]

Originally Posted by HighlandPete

I find this strange as well, as if every RFT is a problem. We have wheel setups where a RFT will be as soft riding as using some UHP tires.

Yep, I mean the Bridgestones are definitely not great but I run the Sottozero RFT's over the winter and they're absolutely fine. They obviously have less grip than the PS4S but the initial turn in is actually sharper thanks to the sidewalls. I think when the PS4S are done I'll look at some UHP RFT's. Yes, RFT's are heavier but the Pirelli's are heavier than the Bridgestones and they ride lighter. And everyone loves track day semi-slicks like Toyo 888's, and they weight a flipping ton, and have very stiff sidewalls.

It's like a bandwagon that someone jumped on at the start when they said all RFT's are bad, and everyone's been jumping on it ever since without stopping to consider that technology *might* just have moved on ever so slightly, and other manufacturers *might* just have done a better job than one particular Bridgestone tyre that seems to in any case have a rubber more akin to plastic on it. The Hankook RFT's fitted to a courtesy G21 I had were imperceptible as run flats, although they were aided by not being 35 profile in that regard.

[CajunBMW]

I can't speak for all rfts but I replaced my oem Continental SSR rfts with the new Michelin Pilot sport 4 ZPs (rfts) and have been very impressed. My conti's were fine for my 340 as a daily driver. Honestly I never had an issue and I don't think the ride was harsh. Just my perspective of course. But I drove the same long roads all over the southern part of the country with other cars without rfts and i really can't say I noticed much difference in ride and noise with rfts vs non-rfts. We were driving with family so this was not track use. But we drive on long flat roads that allow for high speed driving and noise and harshness would be noted. For me, I like the safety of the rft because of trips with kids to locations around our area for sports. But I think there are some good rfts now out there that ride well at least for a daily driver.

[Jvac]

I'll say that for me, the same experience since I installed the Vac monoballs. I later swapped from stock suspension to a custom setup and still the harsh feel over bumps/reflectors etc. I love the setup overall because it handles like a champ, but the increase in nvh is from the monoballs, no doubt. I think having the 19" wheels makes it more noticeable whereas a lot of the others posting here are on 18s. I did just pick up a set of 18s and will post back any differences when I get them on.

[johnung]

Originally Posted by AllaVodka

Thats a fair assumption given I did not disclose more info of my car.

Mileage 42K
Springs + shockware installed at 35k
Monoballs installed at 37k

Nvh picked up a considerable amount with the monoballs so i'm leaning towards them being the issue

It's not unusual for Adaptive dampers to leak at 42k miles. I suggest getting your hands on the shocks to see if they are oily and need replacement.

[AllaVodka]

Just wanted to update everyone here. It was without a doubt the thrust arm monoballs that added significant nvh to my cars set up. I have the dealership revert my thrust arms back to stock and the nvh has been reduced significantly.

[Jvac]

Originally Posted by AllaVodka

Just wanted to update everyone here. It was without a doubt the thrust arm monoballs that added significant nvh to my cars set up. I have the dealership revert my thrust arms back to stock and the nvh has been reduced significantly.

Same here. All else left as is, but when I took them off a couple months ago I instantly noticed the difference. I do miss the steering precision though.
I also ran them with my 18" winter wheels for a while. It was definitely a better ride than my 19s. But I could still feel a big difference going back to stock thrust arms, even on the 18" wheels.

[AllaVodka]

Originally Posted by Jvac

Same here. All else left as is, but when I took them off a couple months ago I instantly noticed the difference. I do miss the steering precision though.

Oddly enough I havent noticed a reduction in steering precision. I still have the vac monoballs in my other control arms though.

[Cytoplasm0671]

Which control arms remain, upper or lower?

[AllaVodka]

Originally Posted by Cytoplasm0671

Which control arms remain, upper or lower?

The smaller more straight arms. I had the thrust arms replaced, with the oem fluid filled ones. I cant keep up with all the lower upper wishbone thrust arm etc terminology

[Cytoplasm0671]

I think what I'll do is order the VAC lowers alone. Seems like that has the best balance of improved steering wth not too bad increased NVH

[Jvac]

Originally Posted by AllaVodka

The smaller more straight arms. I had the thrust arms replaced, with the oem fluid filled ones. I cant keep up with all the lower upper wishbone thrust arm etc terminology

Those would be the lowers. Only the thrust arm/tension strut/upper control arm has the fluid filled bushing

[AllaVodka]

Originally Posted by Jvac

Those would be the lowers. Only the thrust arm/tension strut/upper control arm has the fluid filled bushing

Thanks yeah too many names lol

[exE36M3]

A little late here but YEP... as much as I LOVED the crisp turn-in and steering response with the Turner Monoball, hitting a road bump felt like I crashed into a foot deep pothole.

I removed the monoballs and replaced with the OEM thrust arms...
Now over the same stretch of road... don't even feel the same bump. It's like thump, thump versus BANG, thump.

So monoball if you live in a well maintained road area or weekend car.
But if it's a daily, yeah, keep things smooth and quiet.

[pauli18c]

I'm just going to add that I don't think there's too much NVH from the thrust arns and I'm in Chicago where the roads look like the moon. Maybe I'm just used to dodging potholes.

It was on par with what I was expecting coming from previous cars with solid bushings. The minor NVH trade off is well worth it IMO for the steering response and smiles per miles went up significantly. The OEM steering feel on these F30s is so numb and dreadful