[xpro]

The above photo pretty sums up to what F80 springs look alike.

I have also gotten a set of an F80 DCT CP and I compared them to my eibachs. For xdrive models, especially 3.0L , an F80 springs are much much lower then -05 & -06 versions of eibach springs . I take it thats to do with totally different dampers that come fitted on F8x chassis. But if you like the slammed look, they look well.

[Patel151]

Originally Posted by blumagic

Forgot to update

Here is what the F80 ED springs look like on a 328 xdrive

What's your wheel setup? That fitment is spot on!

[anh3]

I have a 2017 340 xdrive with standard suspension (no EDC) and looking at the MB/MC combination, thoughts? I'm considering the swap mostly for performance/handling, drop/lower effect is only secondary. Another option is F83 springs, but the F83 is around 4k lbs compare to the the f30 340xi 3700-3800; maybe not a good idea?

[blumagic]

Originally Posted by Patel151

What's your wheel setup? That fitment is spot on!

18x9.5 +35, 10mm spacer in front, 265/35 square. Other suspension mods are b8s and millway camber plates

Zero rub, no roll or fender mods

[F80AlpineWeiss]

So I have a set of F8x H&R Sport Springs from my M3 that sold a few weeks ago.

I have a F30 340i xDrive now. What's the consensus on the F80 lowering springs working on my 340?

[anh3]

I've completed my project as of this afternoon, front-MB, rear-MC, with stock dampers on 340xi. Noticeable drop in rear, front I would say half an inch lower, have only drove a few miles around town under 50 mph. My main reason was to have stiffer spring and better road feel, which I would say is about 10-20% stiffer as of now. Not sure if it'll need time to settle as the F8x springs I got was from car with only7k miles.

I failed to take any pics before project, but will upload some soon.

After driving at speed and taking moderate corners, it is way better than stock springs. I had a leased 2017 340rwd with msport adaptive suspension and track package, I don’t know if there is a subjective way to compare. This is at least 50% closer to that in tems of stiffness, road feel, at least 50% more ‘thud’ going over bumps and what not. Significantly less of that bloaty xdrive feel and/or body roll, it is close to the drive feel I mentioned above

[mixmastermike]

I wanted to leave a few pics so that anyone else who's thinking of taking on this project has an idea what ZCP Springs look like on a 340i Xdrive

Front Springs - F80/82 ZCP Manual: MP
Rear Springs - F80/82 ZCP Plain Roof: MR

Dampers Bilstein B8's

When I started this project I was adamant that I wanted a lower stance however its really not really practical with the weather and road conditions where I live - I'd effectively be driving a snow plough in winter....

[anh3]

notice significant road feel as compare to stock springs?

It's feel drastically different and probably 80/90% firm/stiffer for mine. Not as harsh, but as firm as the Msport and track handling package I had on the 340 before. I looked at the difference between curb weight of the F80 vs. the stock 340ix, about 150lbs so that extra weight sitting on the F80 springs contributed to the firmer feel. Hadn't have any issue with bottoming out, I don't think the bump stops have even been engaged yet, I used F80 bump stop for front and kept stock bump stop in rear.

[mixmastermike]

Originally Posted by anh3

notice significant road feel as compare to stock springs?

It's feel drastically different and probably 80/90% firm/stiffer for mine. Not as harsh, but as firm as the Msport and track handling package I had on the 340 before. I looked at the difference between curb weight of the F80 vs. the stock 340ix, about 150lbs so that extra weight sitting on the F80 springs contributed to the firmer feel. Hadn't have any issue with bottoming out, I don't thing the bump stops have even been engaged yet, I used F80 bump stop for front and kept stock bump stop in rear.

Massive difference in feel from the two springs that I tried before - confidence and predictability have increased tenfold. I've mentioned previously that if I had the opportunity to do the project again I would probably choose Konis as dampers. All the reviews that I've read indicate that they're more comfortable when your'e using the vehicle as a Daily Driver. That said I don't get any complaints from my wife about the feel of the car unless we're on really crappy roads.

I'm also using f80 bump stops in the back and I've also never felt them engage my front dampers have built in bump stops.

Im certainly no expert on suspension and I'm learning as I go so I couldn't comment on the weight differences with regards to performance between the F80 and 340i Xdrive when using f80 springs. All I can say is that it's a massive improvement. The traction control, even when I'm in comfort mode, doesn't kick in any where as early as it used to so traction is up massively and the car is a lot more fun to drive. This could have something to do with the 15mm rear sway bar that I Installed - Im currently waiting for a 28mm H&R front sway bar to arrive and hopefully balance her out a little more. I did a little research and the F80 competition uses a 28mm or 26mm front bar (not a 100% sure) and I've heard good things about the H&R bars up front on 6 cylinder f30's so we'll give it a go.

What specific springs are you using?

[anh3]

front-MB, rear-MC, with stock dampers and those are my only mods on suspension. Everything else is stock. I would also have gone with better dampers than stock if I have to do it again, though I don't know how much 'better', but the F80 spring is definitely a much improved mod on its own for the Xdrive chasis. Also more noticeable improvement is the bloaty feel, body-roll in corners is much less noticeable, more control.

[onyourheadtop]

Originally Posted by CarolinaBavaro

As I have seen on here. Most people are using Bilstein shocks with anything. I just recently installed some Koni Yellows due to my EDC shocks 3 out 4 being toast. My car had Dinan Springs with Shockware. EDC is okay for those who want the convenience but compared to the Yellows that setup is straight Garbage. Especially for the cost of replacement. The only con regarding the yellows is the rear adjustment. They have to be removed but besides that they are awesome with Dinan Springs. I think the yellows are a better since you can adjust them to fit what ever spring you use.

How long did your stock shocks last with the Dinan Springs?
I was about to order Dinan lowering springs for my 435ix

[335dNJJ]

Thinking about fitting F8x springs to my 335d F31 but still on the steep part of the suspension learning curve. The original post from FaRKle is very informative and has really sparked my interest in suspension mods for my car.

The 335d xdrive touring is a heavy car at 1765 kg so I think the best match for a suitable firmer spring which should produce a small ride height drop would be springs from the F83 DCT (at 1790 kg). I think MH at the front and MI at the rear. These would be teamed up with Koni SA dampers. Would this work and has anyone with a F31 335d tried this?

Not concerned about a massive drop just looking for a more composed ride with less floating feeling and body roll in the corners.

[dmanb2b]

Originally Posted by 335dNJJ

Thinking about fitting F8x springs to my 335d F31 but still on the steep part of the suspension learning curve. The original post from FaRKle is very informative and has really sparked my interest in suspension mods for my car.

The 335d xdrive touring is a heavy car at 1765 kg so I think the best match for a suitable firmer spring which should produce a small ride height drop would be springs from the F83 DCT (at 1790 kg). I think MH at the front and MI at the rear. These would be teamed up with Koni SA dampers. Would this work and has anyone with a F31 335d tried this?

Not concerned about a massive drop just looking for a more composed ride with less floating feeling and body roll in the corners.

I would go the eibach route

[335dNJJ]

Originally Posted by dmanb2b

I would go the eibach route

Thanks for the reply. Yes, that is an option, but I'm concerned that the car will be too low at the front. I also quite like the idea of creating something more bespoke with the OE springs.

[dmanb2b]

Originally Posted by 335dNJJ

Thanks for the reply. Yes, that is an option, but I'm concerned that the car will be too low at the front. I also quite like the idea of creating something more bespoke with the OE springs.

Glad to try to help. I am not a fan of the "low low" either, but did end up using the shorter version of front springs available for the 340. Despite that I am very pleased with the result. You can read my thread, where I went through the front spring debate and has pics of various f30's. Mine is pictured below for reference, after the drop.

https://f30.bimmerpost.com/forums/sh....php?t=1901058

[johnung]

Originally Posted by 335dNJJ

Thanks for the reply. Yes, that is an option, but I'm concerned that the car will be too low at the front. I also quite like the idea of creating something more bespoke with the OE springs.

I've got KoniSA/Eibach on my 335ix. In my configuration Eibach predicted drop was F0.8"/R0.6" and that's what I got. Its a mild lowering that made the car feel more controllable and precise.

[johnung]

Originally Posted by mixmastermike

Massive difference in feel from the two springs that I tried before - confidence and predictability have increased tenfold. I've mentioned previously that if I had the opportunity to do the project again I would probably choose Konis as dampers. All the reviews that I've read indicate that they're more comfortable when your'e using the vehicle as a Daily Driver. That said I don't get any complaints from my wife about the feel of the car unless we're on really crappy roads.

I'm also using f80 bump stops in the back and I've also never felt them engage my front dampers have built in bump stops.

Im certainly no expert on suspension and I'm learning as I go so I couldn't comment on the weight differences with regards to performance between the F80 and 340i Xdrive when using f80 springs. All I can say is that it's a massive improvement. The traction control, even when I'm in comfort mode, doesn't kick in any where as early as it used to so traction is up massively and the car is a lot more fun to drive. This could have something to do with the 15mm rear sway bar that I Installed - Im currently waiting for a 28mm H&R front sway bar to arrive and hopefully balance her out a little more. I did a little research and the F80 competition uses a 28mm or 26mm front bar (not a 100% sure) and I've heard good things about the H&R bars up front on 6 cylinder f30's so we'll give it a go.

What specific springs are you using?

Could you please describe the difference that you felt/noticed after installing the the 15mm rear sway bar? And the difference that you felt after installing the the 28mm H&R front bar?

[335dNJJ]

Originally Posted by dmanb2b

Glad to try to help. I am not a fan of the "low low" either, but did end up using the shorter version of front springs available for the 340. Despite that I am very pleased with the result. You can read my thread, where I went through the front spring debate and has pics of various f30's. Mine is pictured below for reference, after the drop.

https://f30.bimmerpost.com/forums/showthread.php?t=1901058" rel="" target="_blank">http://<a href="https://f30.bimmerpo...?t=1901058</a>

[img]

View post on imgur.com

Much appreciate the reply and thanks for sharing your experience. I had read your post as part of my research, as well as those by FaRKle and Johnung, the later put me on to the Koni/Eibach combo. The fender to tyre gap on your fine looking car is spot-on IMO. What is the curb weight and distribution on the 340ix? I think the 335dx F31 may be a bit heavier at 3891 lb (or 1765 kg), with bit more weight over the nose due to the diesel lump. This would incline me favor the 250 mm Eibach spring for the front. Both the 340ix and 335dx have the same front spring choice for the Pro-kit, however the rear one is different between the wagon and sedan. Have you uprated the front or rear ARB too?

PS. I do like a silver wheel on the Mineral Grey. On no! That's another thing to add to the growing modification list!

[335dNJJ]

Originally Posted by johnung

I've got KoniSA/Eibach on my 335ix. In my configuration Eibach predicted drop was F0.8"/R0.6" and that's what I got. Its a mild lowering that made the car feel more controllable and precise.

Thanks. I've read your concise and informative postings on this setup and the sound reasoning has convinced me this is the way to go for my car.

[dmanb2b]

Originally Posted by 335dNJJ

Much appreciate the reply and thanks for sharing your experience. I had read your post as part of my research, as well as those by FaRKle and Johnung, the later put me on to the Koni/Eibach combo. The fender to tyre gap on your fine looking car is spot-on IMO. What is the curb weight and distribution on the 340ix? I think the 335dx F31 may be a bit heavier at 3891 lb (or 1765 kg), with bit more weight over the nose due to the diesel lump. This would incline me favor the 250 mm Eibach spring for the front. Both the 340ix and 335dx have the same front spring choice for the Pro-kit, however the rear one is different between the wagon and sedan. Have you uprated the front or rear ARB too?

PS. I do like a silver wheel on the Mineral Grey. On no! That's another thing to add to the growing modification list!

No worries. I believe the 340ix curb weight is at 3850lbs. That said, I would trust Eibach's recommendations as they seem to be pretty accurate, in terms of lowering for each model.

Appreciate the comments on the wheels. I struggled for a long time on a MG vehicle, until realizing a classic silver just provides the best contrast and wheel definition, imo.

[GranTurista]

Originally Posted by 335dNJJ

Thinking about fitting F8x springs to my 335d F31 but still on the steep part of the suspension learning curve. The original post from FaRKle is very informative and has really sparked my interest in suspension mods for my car.

The 335d xdrive touring is a heavy car at 1765 kg so I think the best match for a suitable firmer spring which should produce a small ride height drop would be springs from the F83 DCT (at 1790 kg). I think MH at the front and MI at the rear. These would be teamed up with Koni SA dampers. Would this work and has anyone with a F31 335d tried this?

Not concerned about a massive drop just looking for a more composed ride with less floating feeling and body roll in the corners.

I'm working on trying the f83 rear springs on my f34 (4010 listed curb), I'll let you know how it works out once parts are in. I got a sweet deal locally on a pair of front b6's only to discover them to be RWD only.

Prospective Setup:
F34 6cyl xdrive
~4010 lbs, 50.2% FR

Front:
MB Springs from a F82 DCT
Bilstein B6

Rear:
MI Springs from a F83
Bilstein B6 w/ F80/82 bumpstops

I'm hoping the lighter weight f82 fronts will drop the front ~.6", with the heavier f83 rears proportionally stiffening the rear with a minimal drop.

EDIT: Did you end up with the Eibachs?

[mixmastermike]

Originally Posted by johnung

Could you please describe the difference that you felt/noticed after installing the the 15mm rear sway bar? And the difference that you felt after installing the the 28mm H&R front bar?

The biggest difference that I feel with both sway bars installed is the car feels extremely planted. Body roll is a lot more controlled making it much easier to apply power in and out of corners and stability under braking is night and day... It actually feels like a sports car.

When I had just the rear bar installed the car felt disjointed. I had a lot more grip on the rear and traction control came on a lot later - it felt off though. With both bars installed it very rarely comes on and I have a lot more confidence in the cars handling as its so predictable. I've also switched over to 245 40 18 tires and this has also helped improve the traction.