01-17-2019, 08:02 PM | #1 |
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Msport Xdrive spring rates question
I have a F32 xdrive with normal/nonsport springs. I'm installing Koni active shocks soon and would like to install slightly stiffer springs at the same time, so I'm considering a set of OEM msport springs. Can someone tell me if I would simply be swapping springs with the same rates or if this is what I'm looking for?
I think stock rates are 160lbs front and 486lbs rear, and I would like to find 10-20% stiffer springs. It seems very hard to find actual numbers especially for msport springs. From what I can gather scouring the forum, msport springs are a somewhat higher rate than normal springs for non-xdrive F30/F32 cars. However, there seems to be very little info if the same is true for xdrive cars. Anyone know? |
01-18-2019, 02:16 PM | #2 | |
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01-18-2019, 07:22 PM | #3 |
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I don't think the stock rates are that high. Eibach springs are 29N/mm (165lbs/in) front and 86N/mm (491lbs/in) rear for your car and are noticeably stiffer. The difference between that and the numbers you think might be stock is within the error tolerances of lots of springs.
Last edited by FaRKle!; 01-18-2019 at 07:36 PM.. |
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01-19-2019, 10:31 PM | #4 |
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Here are the only rates I've used for comparison:
M3 E90 160lbs front, 550 lbs rear M4 F82 185lbs front, 575 lbs rear BMW Comp M4 198 lbs front, 685 lbs rear Dinan F32/82 250 lbs front, 650 lbs rear Swift F32/82 279 lbs front, 726 lbs rear All that info came from various forums and could very well be totally wrong. I do not want anything nearly as stiff as those aftermarket springs listed, and I use my car as a daily driver in the snow, so I cannot afford much of a drop. That seemingly left me with two choices to try; 1. M4 OEM springs, or 2. Msport F30/32 springs. I posted before asking if the M4 springs fit, but no one knew. All I'm trying to determine now is if the Msport xdrive springs are actually any higher of a rate or if the non-xdrive will fit, However, if you have a suggestion for springs that will slightly (20%ish) stiffen without much of a drop I would greatly appreciate being steering in the right direction. |
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01-19-2019, 11:33 PM | #5 | |
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01-24-2019, 08:08 PM | #6 | |
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I didn't realize these existed before you mentioned it, but I'm going for it. I have a set of M4 springs and F32 koni special active shocks ready to go on, but I think the M4 springs will lower the car by about 1". I'd love to counteract about half of that with a riser/booster but can't seem to find any F30/F32 specific ones in anything but stock thickness. |
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01-24-2019, 08:52 PM | #7 | |
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