09-15-2023, 12:06 AM | #23 | |
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Didn't feel that way when I drove the test car with it for a week. I do know that it is not as bouncy as stock. But, good to know, next time I do install one in house will take it for a spin. I know that my XM (which is similar setup as X5M) rides good, more compliant than stock.
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09-15-2023, 12:26 AM | #24 | |
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Like the other poster said, It'd be real nice to know what springrate the stock springs are and what all these aftermarket ones are. I know for 98% of the customers who just want to lower their car they won't care, but I do. Someone has to have it, you can't select springrates on these springs and get them made by whatever manufacturer they're white labeling unless you know what to go to.
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09-15-2023, 06:09 AM | #25 | |
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09-15-2023, 07:37 AM | #27 |
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I might just get the Dinan Setup and call it a day, but I really do need more feed back.
Dinan Springs and Bump Stops - https://www.dinancars.com/products/s...arts/D100-0936 https://www.dinancars.com/products/s...arts/D193-0121 Last edited by S68 X5MC; 09-15-2023 at 08:00 AM.. |
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09-15-2023, 08:52 AM | #28 | |||
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That said, as noted earlier in the thread its hard to really do a straight comparison on numbers with springs because they often differ in spring type and how they behave/feel as a result. For example -- when you change from a progressive spring to a linear rate spring it will often feel "softer/compliant" even if the rate has increased simply because the feel is more predictable. Add into that a host of other variables such as matching bumpstops (part of the overall spring rate as well) and the dampers themselves (not to mention tires, other suspension mods, etc) there are a lot of moving parts which can affect ride quality and overall feel. I'd like to think we have this down to a science and offer the best possible hybrid of perfomance, look/drop and ride quality out there. We take a lot of pride in the fact that the most often element praised in drive reviews (both consumer and media) is the suspension. It may not be sexy but suspension is what makes or breaks a car in terms of enjoyment IMO. F95 X5M Front Stock - Linear Springs - 580 (lbs/in) rate Dinan - Dual Rate Springs - 696 (lbs/in) working rate (max hard rate) F95 X5M Rear Stock - Progressive Springs - 724 (lbs/in) working rate (max hard rate) Dinan - Dual Rate Springs - 869 (lbs/in) working rate (max hard rate) |
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09-15-2023, 09:01 AM | #29 | |
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Not sure if you saw this video. They track test the kit prior to release. https://youtu.be/z3zABTCiaRo?si=igNLwdRGtQM6Jfgx
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09-15-2023, 09:17 AM | #30 | |
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09-15-2023, 12:07 PM | #31 | |
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Ben, you seem to have a direct connection to MSS - do you know, or have they shared (or willing to share) the spring rates on their springs? |
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09-15-2023, 02:09 PM | #32 | |
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09-15-2023, 02:23 PM | #33 | |
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That video has a child screaming, there is no data, no before and after times, no G-meter, nothing. To say someone test it on the track doesn't mean much. I've tested out a clapped out s13 on bc coils with ebay springs. But hey they're track tested. Maybe I should just do H&R like S68 X5MC said. At least they're a real suspension company
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09-15-2023, 02:38 PM | #34 | |
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09-15-2023, 02:40 PM | #35 | |
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09-15-2023, 03:09 PM | #36 | |
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https://www.bimmerworld.com/Suspensi...1-X5M-X6M.html I think I saw someone saying these were stiff, but it might of been someone who put x5m springs on a regular g05.
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09-20-2023, 10:55 AM | #37 |
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After considering the options, I pulled the trigger on the Dinan springs and bumpstop kit. My reasons being -
1. MSS and other adjustable spring-only options don't make sense to me. Who is going to go for adjustable springs, when the adjustable piece is for dialling ride height specific to performance (ie. corner balancing for track use). You're absolutely not using springs for that, you're going with a full adjustable coilover solution (like the 3-way adjustable coilovers I have on my track car). The added cost in this application for that adjustability is a waste, in my opinion, as every time you adjust ride height, you're paying for another alignment. It's ultimately a more expensive set and forget setup. 2. MSS feedback indicating spring rates softer than OEM really doesn't make sense to me as you're adding more squish paired to a damper that's now more compressed all the time. If you're lowering ride height but not adding in spring rate to account for the more limited damper travel, you'll be banging off the bumpstops constantly. That's a recipe for a poor ride. 3. I considered the H&R springs. They advertise almost the same as Dinan - 35-40mm drop front/rear, and a 10-20% increase in spring rate over stock. These make sense as now we're adding rate to a lower ride height, so presumably the dampers won't be bottoming out making for a better ride. Despite being less expensive (~$360 + shipping) when compared to Dinan + bumpstop kit, they don't come with (or have the option to add) a bumpstop kit. Whether needed or not is TBD, but that led me to Dinan as it's a paired solution. Given the similar specs, you could probably pair the bumpstop kit with the H&R springs and call it a day (albeit at a slightly higher cost than the Dinan solution). 4. Dinan and H&R offer very similar specs (1.4" drop, 20% increase in stiffness). I think Dinan springs are made in China, while H&R are made in Germany. Points to H&R? Does it matter? Possibly. However, the Dinan warranty is worth something, so I know that if I have issues, they'll look after it. So while there are a number of options out there, adjustable springs makes no sense to me, softer springs/more compliant ride on smooth roads doesn't make sense to me, and a solution that incorporates modified bump stops into the suspension dynamics wins extra points. My only reservation is despite being able to fit a small living room set in the gap between tire and fender arch, the OEM springs are matched to the OEM dampers. Mess with that formula and I know there will be tradeoffs. |
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09-20-2023, 11:06 AM | #38 | |
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Also FYI -- Dinan springs are made in the US and have been for 30+ years. |
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09-20-2023, 03:32 PM | #40 |
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Looking forward to hear your feedback Sleeper , since you've played with 3 ways you should have a pretty good sense of how these change the suspension and can give a real accounting of how they feel.
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10-04-2023, 10:22 AM | #42 |
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Installed yet? I just got my SUV and I love it, but that wheel gap just looks off and you definetly feel it when getting in and out. I'm 6ft and that says something considering it's an SUV, not a truck. The stock comfort ride isn't bad at all to me and curious what your thoughts will be with these springs installed.
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10-05-2023, 02:32 PM | #43 | |
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You can't go wrong with these, definite recommend. |
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S68 X5MC271.50 Dinan_Engineering3912.00 |
11-04-2023, 05:56 PM | #44 |
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I have Dinan springs with their supplemental bump stops. Car handles mich more precisely. And drop is daily conservative. Spaced 15f 18r as well. Came out better than I expected coming compared to my g83 on KW. Drives much more confidently now. Installed @ apex auto in Sacramento Ca.
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