01-08-2022, 01:10 PM | #309 | |
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03-19-2023, 02:32 PM | #310 |
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Eibach Pro springs
Had the springs on two weeks now. Dropped the front one inch but only 3/4" in the rear. Also almost a eighth of an inch difference in ride height for the rear. Ride heights were dead nut the same with the stock spring. I would have thought you could match lengths out of a batch manufactured. I other words group together the same length. I cut off a inch of the bump stops in the rear.
Had already assembled the front so I wasn't going to change the bump stops there just yet. Rides fine. No complaint there. I have a HR front bar, and SPL toe arms in the rear. Going to get a alignment tomorrow. Happy so far. Cheers, Philip |
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04-22-2023, 04:53 AM | #311 | |||
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Hey super old thread but wanted to give a final opinion on the subject: In my experience with this product I had some bad results which were due to both spring & installer. I had the car stock for approx 1 year, put the springs for 3 of months and then back to stock. Still have the car now after almost 5 years. Plenty of relaxed and spirited drives in between. As it's been mentioned and documented here, installing shorter/stiffer springs on stock shock absorbers is not a great idea. I'm sure this and other lowering springs have their place but I don't think that is on stock cars (unless with other adjustments) Let's start from the install: The shop that put these on used an impact wrench to fasten & unfasten all the bolts, maybe not the best method as most of them are supposed to be one-time-use and torqued to a specific value. I had a lot of creaking noises when the car was turning under load (e.g. hairpin) and going over speed bumps / road imperfections at low speeds. After returning to stock springs the noise remained and honestly drove me nuts, had to go back to a BMW dealer to get it fixed. It took a long time for them to diagnose it and only after replacing all the suspension bolts with brand new ones the noise disappeared. They had also installed a friction disc between the front brake rotors and wheel hubs but that wasn't the fix for the problem above. Driving experience: I was looking for a more planted drive especially during acceleration and turns on track / mountain roads. Unfortunately these springs only made it worse, as the car wasn't as planted as with stock setup during these moments, making it unsettled and destabilising the "exit" from such turns. I am not a race driver or suspension expert, there may have been a way to fix it while keeping the Eibach springs but the easiest solution for me was to go back to stock which is already an amazing setup. Ride comfort was also compromised as it was noticeably stiffer while driving at highway speeds (130km/h). It was too uncomfortable for me as this is my daily driver. Driving around town & low speeds however was great. Final thoughts If you're just after look and you don't care about how the car behaves in the above mentioned scenarios then go for it. Is a cheap solution rather than a coilover kit. You get what you pay for however, there's no free lunch There might be a way to make these springs work with stock shocks, probably they'll wear faster and you'll have to make other modifications, e.g. shorter bump stops as others did but I don't have experience in this aspect. Install is critical, make sure the bolts that need to are replaced and use proper torque specs. Suspension components are to be installed under load. This is to avoid creaking noises. Hope this helps ofc this is IMHO, WMMV |
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04-22-2023, 06:36 AM | #312 | |
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I’ll also mention that BMW factory top hats just aren’t very high quality and it’s easy to get noise from them simply from unloading and reloading the spring tension. The proper torque is very important here. Finally, if tightening is done with the suspension at full droop, bushings will prematurely wear out, affecting ride quality and handling that could be mistakenly attributed to the springs. That being said, there are many people running springs on the F platform and it seems like 90% are happy. Strut blows out, buy a new one or upgrade to performance struts or coil overs. How fast that happens depends on the usage of the car. |
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04-22-2023, 02:35 PM | #313 |
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The only thing I can add here is that after driving with these Eibach springs for a little over two years I have zero complaints, still no weird noises (No new bolts used at the time), no jumpy handling.
The difference in driving with the original springs and these eibach springs with shortened bump stops is virtually non-existent. Maybe I also have some luck with the expertise of my mechanic (Not a BMW employee) . In any case, shortening the bump stops with this kind of springs is a must in my opinion and the lowering should really not be more than an inch because otherwise I suspect that extra wear on the OEM shock absorbers is inevitable....that's also why I didn't choose H&R,
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04-22-2023, 02:45 PM | #314 |
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Have a close look at your secondary spring and are no longer a hard stop you are used to. They are progressive in nature and act like secondary springs to increase the spring rates as the vehicle sets into a corner.
If your lowering/sport spring constantly bottoming out and causing the car to jump, they may be way too softly sprung. suspension pickup points with spherical bearings don't require them to be loaded when tightening to specs. |
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04-22-2023, 02:55 PM | #315 |
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I decided to give these springs a try....I'll preface by saying I'm not really a lowering spring guy, haven't used them in 15 years or so when I had a S197 Mustang. But, in this uncertain economy, I couldn't justify the price of the M Performance coilovers as much as I lusted after them. My car is a garage queen so I don't really need them as much as want them.
In any event, the install is very simple on this car and I had no noises, clunks, vibrations or anything like that. I am rubbing slightly in the front though, which I thought was curious. My personal opinion...the ride is about 30% stiffer than the already stiff Comp suspension when you're on very rough pavement. But the overall characteristics are very similar to OEM and I don't mind it at all. We will see after I get out of the "honeymoon phase." Installed with 10mm spacers. |
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04-22-2023, 03:29 PM | #316 |
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We have very good feedback with the M4 Swift Spec-R springs on the M2/M2C. Linear rate and no bottoming issues associated with softer progressive rate lowering springs.
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04-24-2023, 07:16 AM | #317 | |
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04-24-2023, 08:09 AM | #318 | |
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Especially don't skip over my unintended test experience after installing the springs on the previous page.
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07-08-2023, 02:30 PM | #320 |
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Looks great. What would you estimate the drop to be?
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