03-13-2017, 01:28 PM | #23 | |
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By how much did your lap times improve at these tracks with the MP coilovers??
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03-14-2017, 07:50 AM | #24 |
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It's hard to give an exact number since I changed wheels and tires , but I can estimate from my data that the car was about 2 sec faster at Road Atlanta due to the suspension.Remember that these allow you to lower the car , so improving the CG on a big car will really help!
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03-14-2017, 10:16 AM | #26 |
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40% stiffer than stock, don't know the actual number though.
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03-15-2017, 08:26 AM | #27 |
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what are the spring rates on stock?
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03-15-2017, 07:59 PM | #28 | ||
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In full disclosure, as spring felt settled, I already adjusted the height a little bit. Now it's 600mm at rear(recommended) and 598(3 mm higher than recommended), a less nose down setup. A picture below I just took:
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Last edited by SeanWRT; 03-15-2017 at 08:06 PM.. |
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03-16-2017, 10:14 PM | #29 |
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I just found out something about height adjustment that is very confusing.
Me and my friend was at the mod shop yesterday installing KW V3 on his Z4. When adjusting the height, the mechanic referenced the KW installation document, which specifies adjustment ranges measured from spring. It had good photos to explain the distance measurement A. See picture 1 below. I didn't remember I had anything like that to reference when installing my MPS. Instead BMW installation instruction told us to measure vehicle height from the lower rim edge vertically to the wheel arch, see picture 2. I felt something could be wrong, so I immediately checked my BMW document page by page and actually found the "adjustment ranges" from spring in the TUV approval section. See picture 3. BMW MPS Adjustment Range (without photo explanation) are: Front: Distance from the spring rest to the nearest fastening screw. 165~185mm Rear: Distance from contact point of the car to the adjustable spring perch. 29~44mm KW V3 Adjustment Range (with photo explanation as distance A) are: Front: Lower fastening screw to spring contact area. 170-195mm (Z4) Rear: Lower fastening screw to spring contact area. 15-35mm (Z4) Assuming BMW and KW are talking about the same distance A, which we're unsure of because BMW doesn't have photo explanation, my result is 159mm at front and 22mm at rear, or 6~7mm lower than minimum. What confuses me is that my wheel-to-fender distances (598 front, 600 rear, 75*2KG loaded) are already higher than BMW recommendation, which has the photo explanation and is the standard we're instructed to follow. BMW recommendation should be somewhere halfway between max and min of spring adjustment range, which should be 175mm (165-185) front and 39mm (29-44, rear being 5mm higher as designed) rear. I would be sitting 16~17mm higher than now, which will be basically stock height, should I follow 175 and 39. At the end of day, we didn't do any adjustment without authoritative confirmation. But I am concerned it will hurt shock if we don't do it right. How did you adjust the height? Anyone chime in?
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04-05-2017, 09:54 AM | #30 | |
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Are you running camber plates too? If so which ones? How is your tire wear? How much camber do you have dialed in? I assume there is no camber adjustability without plates? |
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06-04-2017, 03:38 PM | #32 |
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Has anyone found some settings to dial out mid-corner understeer with the m coilovers? I notice while the car has great turn in, it pushes just a bit in corners ( off throttle ), wondering if it's possible to dial that out with some rebound/compression tweaks on the performance coilovers.
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07-13-2017, 07:25 AM | #34 | |
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07-13-2017, 08:15 AM | #35 | ||
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07-13-2017, 09:10 AM | #36 |
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How is the scraping situation at 598 front and 600 rear?
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07-13-2017, 09:14 AM | #37 |
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This is with the download of 2x75 kg?I ask because i installed Ohlins R/T for bmw m2 and dealer bmw forgot to measure the stock parameters.I put on the recommendations of Ohlins settings and i got 620mm in front and 615mm in back.You think that this is strange?
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07-13-2017, 09:59 AM | #38 | |
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With 75kg*2, it would be approximately 3mm lower at front and 4-5mm at rear.
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07-13-2017, 10:04 AM | #39 |
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I am not sure of the meaning of "scraping" but no issue so far with 598 and 600mm.
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03-18-2018, 10:17 AM | #40 | |
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