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08-11-2020, 11:57 AM | #177 |
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Yes, fits fine
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08-12-2020, 08:33 AM | #179 |
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Et22 or 25 works well. I have the et27 EC-7’s I run with a 5mm spacer
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09-11-2020, 07:14 PM | #180 |
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Some pics for visual reference.
2006 E90 330i converted to complete M3 front suspension brakes etc. KW CS 2ways (M3 version) Apex Arc8 18x10 et 25 Bridgestone RE71R 275/35/18 Tires KW stock 170/61/110 yellow spring, Pictured with 5mm spacer! Wouldnt fit without spacer. Eibach 140/60/110 red spring, pictured NO spacer. For reference, my spring perch is moved up Exactly 30mm higher for the eibach spring which is the same as the difference in springs and equal ride height as a result. For the KW spring the spring perch is 10 turns up from bottom, Eibach spring I am 8.5 Turns down from the top. Dead Horse I know, but maybe another visual will help someone else! |
09-21-2020, 11:37 AM | #182 |
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Yes, but check your spring rate to ensure it's what is on the car unless you are looking to change the spring rate. Some kits came with 90 nm, some with 110 nm.
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09-21-2020, 11:46 AM | #183 |
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Just looked and the spring shows 110-170*. Im assuming its 110nm then. I want to keep the same spring rate so it would be that same part #?
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09-21-2020, 10:18 PM | #184 | |
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10-21-2020, 12:34 PM | #186 |
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I pulled my clubsports off a few weeks ago and had KW rebuild them. About to put them back on but it's got me thinking again... At the ride height I was at when I pulled them off the helper spring was fully compressed and really only acting as a 'spacer,' even at full-droop so any con's of just ditching the helper and getting a 160/170 length spring?
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10-21-2020, 03:01 PM | #187 | |
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If that's the case, then the helper is doing nothing. Like you said, it's just acting as a spacer and taking up space. |
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10-21-2020, 03:55 PM | #188 |
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Yup, I forgot to take a picture but it was dong nothing. I think the small Eibach spring though will be just a bit too short without it though so going to see if I can dig up the OE KW Springs or get some new ones.
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10-21-2020, 04:11 PM | #189 | |
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KW should be able to get you any spring length and rate you want, but there seems to be some good Eibach options people have tested - not sure if they'd work for your ride height though. Going to a shorter spring, in the same rate, is fine as long as the spring has sufficient stroke. Going stiffer is much simpler because you'll need less stroke, thus a shorter and stiffer spring is an easier replacement. With that being said, I wouldn't recommend going stiffer in the front without stiffening the rear, the CS (and 99% of all suspension options for the E9X M3's for that matter) are already very front-biased. Last edited by tsk94; 10-21-2020 at 04:16 PM.. |
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10-21-2020, 04:27 PM | #190 | |
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10-21-2020, 04:32 PM | #191 | |
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10-21-2020, 04:44 PM | #192 | |
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10-21-2020, 04:58 PM | #193 |
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I had the car on a lift when I looked at this.
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10-21-2020, 04:59 PM | #194 | |
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10-21-2020, 06:23 PM | #195 | |
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11-10-2020, 01:15 AM | #196 | |
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My question is as a track focused setup is the 90nm springs or the 110nm springs preferred? Does the stock KW CS helper spring work with the shorter eibach springs? Or are you ordering a different sized helper from KW. |
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11-10-2020, 07:44 AM | #197 | ||
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90 vs 110 is harder to answer. I think there are varying approaches/perspectives on spring rate. It is worth noting that it's unknown whether the updated version of the kit has different shock valving to match the stiffer springs.
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11-10-2020, 07:48 AM | #198 | |
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