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01-09-2012, 04:26 PM | #1 |
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3.0 si vs M suspension
Does anyone know what the difference is between the 3.0si with the performance package and the M suspension? I know that the tires and the engine are different but what about the suspension?
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01-09-2012, 04:30 PM | #2 |
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Z4 non-M sports suspension is based on the E46 non-M design. Struts, springs, shocks, control arms...etc are all interchangeable between them. The Z4 M suspension is a hybrid between E36 M3 and E46 M3, with the front suspension parts being re-designed E36 M3 parts, and the rear suspension parts being redesigned E46 M3 parts. The swaybars are from E46 M3 as well (rears are E46 M3 CSL bars).
As for comparison, the non-M Z4 will hold its own, but the MZ4s have stiffer springs and higher damper rates, plus the MZ4s have more camber up front. The lower control arm is from the E46 330i with Performance Package (ZHP). The major difference will be the fact that the MZ4 has a tuned limited slip differential while the Z4 3.0Si has an open diff, and the M has servotronic rack-and-pinion steering instead of the non-M's electronically assisted rack-and-pinion steering. The M also has a quicker steering ratio. End result, is that on the track the M has a much higher threshold, with quicker turn-in feel. But you will not be disappointed with the 3.0Si coupe, it'll likely hang at most tracks with the best of them. 265HP on a 2,9xx lbs frame is going to make a very capable car on track. http://forums.bimmerforums.com/forum...d.php?t=844305 |
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01-10-2012, 08:31 AM | #3 | |
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01-10-2012, 09:05 AM | #4 | |
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01-10-2012, 10:11 AM | #5 |
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F15 X5 xDrive35i [9.17] F10 550i (Retired) [9.17] F25 X3 xDrive35i (R ... [9.43] E82 135is (Retired) [9.53] E85 Z4 M (Retired) [9.41] E90 328i xDrive (Re ... [9.25] E86 Z4 3.0si (Retired) [8.93] |
I did a 10hr drive from NJ to VIR in my 3.0si. It wasn't too bad, discomfort in the lumbar but I think that'd happen with any car. You just have to remember to sit further back, straight up.
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01-10-2012, 10:32 AM | #6 |
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Both the MZ4 and regular non-M Z4 use the "performance package" E46 330i front lower control arms if I'm not mistaken. Otherwise all other info are correct as far as I know.
I had an '03 Z4 3.0 prior to the MZ4 Coupe, and frankly both cars are too stiff for daily use, especially if the road is rough. Neither are super comfortable for long drives, but the non-M can be comfortable enough with traditional tires (non-run-flats), where as the MZ4 already comes with traditional tires so there's not much to "soften the blow" unless you replace the shocks and springs.
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01-10-2012, 02:14 PM | #7 | |
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01-10-2012, 04:51 PM | #9 | |
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Garage List E86 Z4 M [10.00]
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That's why wheels for M fitment won't fit on non-m cars even with sport or m-sport suspensions. The offset is way too aggressive. |
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01-10-2012, 06:24 PM | #10 | |
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01-10-2012, 07:46 PM | #11 |
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why are you down on this?
the fact is that BMW didn't have an ///m variant of your car when it was new. people wanted a sportier version of the car, so BMW gave it to the fine folk of ///m to tune the suspension. now you have an ///m approved product. so was your car built by ///m? ... no. were some of the components tuned by ///m? ... yes. be proud of your car. you worked hard for it.
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06-29-2023, 07:08 AM | #12 |
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Guys, noone seems to be touching on the fact that the Z coupe Si came in two variants. SE and Sport. I beleive there is further differences between there two sets of suspension, I know for a fact that the sway bars are thicker on the Sport, Autodoc also has different shock absorbers and spring listed as "for cars with sports suspension".
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09-22-2024, 05:59 PM | #13 |
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TheyÂ’re are difrences between the 3. The sport sits lower. Has different part numbers than the si suspension. The bump stop is even shorter on the sport than it is on the Si.
I have a 2004 with M sport suspension and just put new struts and parts on. I went with aftermarket parts and made sure to get parts for M sport. Was confusing! The top strut mount is the same for both on the e85 at least. Most sellers will say / list if itÂ’s for m sport or Standard. The M sport sway bars are quite a bit thicker than standard so there is a difference. Since these were the pre M I read somewhere they used some M parts off other modles till they came out with the true M series z4. So we that have the sport have a middle of the road drive between the 3. Stiffer than the standard but not as hard as the M. |
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