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03-11-2010, 03:27 PM | #1 |
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"Edition" M3 Suspension Discussion
Heard back from Sytner today. Technical Division at BMW AG will not provide the information we seek on the Edition suspension. However my dealer can order rear Edition springs but the computer currently says 'no' (anybody watch Little Britain?) as nobody has ordered any yet. I expect this to change shortly. Based on the price of the rears, the cost of all 4 (in the UK) will be 30% dearer than Eibach.
Also dealer can order all the other dark chrome goodies, wheels etc. |
03-11-2010, 04:07 PM | #2 | |
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If the dealer can check "the computer" for springs, can he also do the same for shocks?
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03-13-2010, 04:43 PM | #3 | |
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I took some pictures on my phone of Edition front strut and standard M3, if anything apart from springs looks different, I'll post it up. From personal experience watching my dealer, the BMW system is not user-friendly at all for finding parts on certain items. I can ask about the shocks. |
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03-13-2010, 05:35 PM | #4 |
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The Edition uses shorter shocks, but uses the same springs as the normal M3 depending on spec. Top mounts and bump stops are also the same.
There are around 6 different springs available for the E92 depending on the spec of the car |
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03-13-2010, 06:42 PM | #5 |
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Can you elaborate in detail?
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03-13-2010, 06:51 PM | #6 |
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BMW uses different springs (I didn't know there were six until alpina527's post) because an M3's weight varies from one car to the other, depending on how it was optioned out. A bone stock M3 weighs significantly less than a fully optioned M3. That's why if you check realoem.com or bmwparts.info for spring PNs, you won't find any. Your dealer would need your VIN in order to determine which springs your car has.
That's a very nice find, alpina527. Mind if I ask how you got that info?
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Mods: M Performance exhaust | ZCP retrofit | Euro airbox | GTS DCT flash | JPN 240 ECU flash | Euro LCI taillights | CRT lip | OEM alarm retrofit | Space Gray bumper plugs | BMW Performance: Mk. II spoiler / Mk. II non-electronic steering wheel / mirror caps / front grilles / side gills / intake louvers / emblem |
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03-13-2010, 06:55 PM | #7 | |
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How very interesting...
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'09 E92 M3: Space Gray, Black, Carbon Leather | ZTP 2MK ZPP 2MT 6FL | link 1 / link 2
Mods: M Performance exhaust | ZCP retrofit | Euro airbox | GTS DCT flash | JPN 240 ECU flash | Euro LCI taillights | CRT lip | OEM alarm retrofit | Space Gray bumper plugs | BMW Performance: Mk. II spoiler / Mk. II non-electronic steering wheel / mirror caps / front grilles / side gills / intake louvers / emblem |
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03-15-2010, 05:44 PM | #8 | |
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Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius and a lot of courage to move in the opposite direction. - Albert Einstein
01 e46 m54 - Current : 14 f10 n26 - Boring & Gone : 15 f30 n26 - Current : 08 e92 n54 - Gone & Missed!!! |
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03-21-2010, 07:23 AM | #9 | |
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03-21-2010, 01:10 PM | #10 | |
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They don't change springs to affect performance, or to modify the car's stance. The factory's "job" is to build the car exactly to spec for ground clearance for the market in which the vehicle is homologated. To do otherwise would invite lawsuits if anything goes wrong. So, what happens when "the factory" lowers the car? The "factory" that builds the car doesn't do anything. A change-order goes to Engineering, and they engineer a complete component solution so that when the lowered car is finished it rides within a new specified range of ground clearance measurements. It comes complete with new specs for any parts that must change to deliver that ground clearance spec while maintaining vehicle safety and performance. Most likely in the BMW "Edition" case, and with absolute certainty in the Japanese market case, BMW uses different struts on the lower-riding cars. It's likely that they moved the spring seats to lower the car, but you can't know for sure without measuring. They may also have specified different springs. There's just no way to know unless you have the parts right there and the tools to do the measurements. |
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03-21-2010, 02:13 PM | #11 | |
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'09 E92 M3: Space Gray, Black, Carbon Leather | ZTP 2MK ZPP 2MT 6FL | link 1 / link 2
Mods: M Performance exhaust | ZCP retrofit | Euro airbox | GTS DCT flash | JPN 240 ECU flash | Euro LCI taillights | CRT lip | OEM alarm retrofit | Space Gray bumper plugs | BMW Performance: Mk. II spoiler / Mk. II non-electronic steering wheel / mirror caps / front grilles / side gills / intake louvers / emblem |
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03-21-2010, 04:57 PM | #12 | |
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Does the car have Edc, Dct, sun roof, hi fi, nav? It would be interesting to know the wire diameter of the japanese cars coils. Every different spring grade is usually .2mm (.008") different. This can be measured with a vernier caliper or micrometer. The spring seat height can be measured with a tape measure from the spring cup downwards to a specific bolt etc. If he can take a photo of the bolt he is measuring it to, we can then compare different strut measurements. The japanese cars use the same bump stops and top mounts as the regular M3, so I assume the gap between the top of the bump stop to the top mount is the same at .875" |
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03-21-2010, 10:48 PM | #14 | |
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'09 E92 M3: Space Gray, Black, Carbon Leather | ZTP 2MK ZPP 2MT 6FL | link 1 / link 2
Mods: M Performance exhaust | ZCP retrofit | Euro airbox | GTS DCT flash | JPN 240 ECU flash | Euro LCI taillights | CRT lip | OEM alarm retrofit | Space Gray bumper plugs | BMW Performance: Mk. II spoiler / Mk. II non-electronic steering wheel / mirror caps / front grilles / side gills / intake louvers / emblem |
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03-22-2010, 12:19 PM | #15 | |
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It would be great if someone can dyno the shorter E36 bumpstops so we would have a factual account of how they compare to E92. |
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03-22-2010, 04:42 PM | #16 |
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I asked alpina527 too, as he has a BMW contact as well I've been asking a lot of people
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'09 E92 M3: Space Gray, Black, Carbon Leather | ZTP 2MK ZPP 2MT 6FL | link 1 / link 2
Mods: M Performance exhaust | ZCP retrofit | Euro airbox | GTS DCT flash | JPN 240 ECU flash | Euro LCI taillights | CRT lip | OEM alarm retrofit | Space Gray bumper plugs | BMW Performance: Mk. II spoiler / Mk. II non-electronic steering wheel / mirror caps / front grilles / side gills / intake louvers / emblem |
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