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BMW 3-Series (E90 E92) Forum
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Current recommend for struts?
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12-26-2020, 11:32 PM | #23 | |
Second Lieutenant
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Rep 223
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Drives: E92 328i 6MT
Join Date: May 2020
Location: Bay Area
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Quote:
Here is what he said with the progressive springs, these are really soft in the beginning stroke of the spring and "progressively" get stiffer the more the spring is compressed. The problem with this is, as the "spring rate" depends on how much the spring is compressed, the amount of spring stroke left at the "lower rate" is very minimal and is quickly taken up by bumps, especially seeing as how around 50-60mm of stroke is already gone by default due to the weight of your vehicle. Unfortunately, spring fitments/lengths are "generic" and are not vehicle specific (i.e they don't take into account the weight of the vehicle they are being installed on. Lowering spring kits being the exception of course) taken at the max rate, those spring rates are actually still on the soft side though (4.5K/10K), but as the range in rate in these springs is very narrow, taking into consideration the above, they're not really progressive at all. For most of the time, they would be the same as 4.5K/10K linear springs. Hopefully this is helpful, I inquired him about tuning my kw v3 rebound/compression. One thing I will have to say is that my car is quite low already at 13 in the front. I never hit my bumpstops.
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2007 E92 328i 6MT | KW V3 | 3SI | SSR Type-C 18x9.5/10.5 | AA Headers
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