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04-23-2009, 10:57 PM | #23 |
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I too want to read a full review + pictures of the Dinan spring kit. I assume it'll improve the handling/feel in all the modes compared to what I'm experiencing in my H&R's, which do not improve the feel in comfort, can't really tell if it's good or bad in normal, and improves the feel in sport.
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04-24-2009, 08:03 AM | #24 | |
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I ordered mine in early February and still haven't received them. Do you remember the date that you ordered yours? My dealer has been emailing Dinan every week or so and still no springs. I'm going with Dinan for performance reasons and warranty preservation. Lowering CG is generally good for performance, but spring rate and match to the shock is equally and sometimes more important. With unmatched springs for the application, there's not only a worry about the EDC electronics (probably not a big issue) and also premature failure of the shock tube itself. Dave
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04-25-2009, 09:02 AM | #25 |
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I have the Eibach springs.
1. How long have you had the setup (miles / years)? 300/1 week 2. Have you had any issues with the dealership and the associated warranty? I haven't had to take it in yet. I avoid it at all costs since they scratched my hood during the 1250 mile service. 3. Do the springs improve performance both on the street and on track? They feel better on the street, but I also changed tires at the same time. The understeer isn't quite as bad in hard cornering. I don't track the car. 4. Is the ride harsher? I wouldn't describe it as more harsh, but it's slightly more firm. It has a more positive feel IMO. 5. Any problems as a result of the springs? Not to this point, but it's only been a week
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04-28-2009, 07:59 PM | #26 |
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Dinan springs installed
Springs were installed today. The few miles I drove showed it to be a very civil kit, and the ride height is noticeabley lower, though not over the top. No wierd noises, either. Here are before & after pics. I'll get more once I have my spacers installed next week.
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04-28-2009, 08:17 PM | #29 |
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The lighting was different between the two. You can definitely see it in the rear, but not obvious in the front from the photos. I's about 1/2" both ends. I noticed it right away when I picked the car up.
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Greg Lake Oswego, Oregon, USA 2023 M2 Coupe - Brooklyn Grey/Cognac/CF, 6MT; 2020 MB GLE 450 |
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04-28-2009, 10:26 PM | #30 | |
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04-28-2009, 10:40 PM | #31 | |
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Ride height w/ Dinan
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I purpoosely took a conservative approach with this car--not for everyone, I admit.
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Greg Lake Oswego, Oregon, USA 2023 M2 Coupe - Brooklyn Grey/Cognac/CF, 6MT; 2020 MB GLE 450 |
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04-28-2009, 10:51 PM | #32 | |
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When you got it aligned, were you able to dial in a little more negative camber and, if so, how much? Hopefully I'll have mine in by the week after next. Dave
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04-28-2009, 11:52 PM | #33 | |
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04-29-2009, 08:10 AM | #34 |
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Negativity
I think about 1.3 - 1.4 degrees negative is maximum w/o camber plates.
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Greg Lake Oswego, Oregon, USA 2023 M2 Coupe - Brooklyn Grey/Cognac/CF, 6MT; 2020 MB GLE 450 |
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04-29-2009, 08:14 AM | #35 |
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I wanted to test the springs and get the force/displacement data, but it seems like I won't be able to do that. (I'm going to WGI on Monday and the springs will show up at the shop on Friday and be installed with camber plates the same day). I suspect the Dinan springs will be slightly stiffer than stock though.
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04-29-2009, 08:24 AM | #36 | |
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Which camber plates are you using? I'm assuming that I can get at least 1-degree of negative on the front from the stock mounting, so I'm going to stay stock, if that's true, since this won't be an "all out" AX or track car, just casual racing. Dave
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04-29-2009, 08:33 AM | #37 | |
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04-29-2009, 08:40 AM | #38 | |
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04-29-2009, 08:41 AM | #39 | |
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I'll go with the Dinan plates. They forged Al and will provide up to -2 degrees. I think that is a good setup for me given I don't want a full suspension swap at this point.
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04-29-2009, 08:51 AM | #40 | |
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Spring rates are also easy to measure if you've got the equipment. Dinan has their replacement bump stops for the E9x M3s, which is copying and modifying BMW technology. That's about the only thing that makes them different. Ok, the less aggressive drop is unique to them and they've got a good rational for it. Until I read this forum I didn't realize that such a high percentage dropped their cars for purely cosmetic reasons. I've always thought of it as a performance enhancement. I see that I'm in the minority here. Still, Dinan gives away the whole cosmetic-only market to the more aggressive looking drops. Anyway, Dinan's approach for the M3 E9x is unique, but easily copied and no one is copying them. I don't think that publishing spring rates and offering alternative springs would hurt them at all, at least for the E9x. Dave
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04-29-2009, 09:23 AM | #41 |
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The effective spring rates are variable. I haven't looked at the Dinan springs but will assume that they may be rising rate as well. Since the bumpstops contribute significantly to the spring rates, publishing a spring rate may not be particularly helpful.
I think the most important take away when looking at the Dinan springs is that since they don't lower the car very much, the suspension geometry remains closer to optimum. The slightly higher spring rate helps out somewhat, but that is not something that can be easily quantified. |
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04-29-2009, 09:29 AM | #42 |
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Very nice. I am considering this setup myself. Would you mind PM'ing me how much your spring and install cost? I got a quote from Dinan and it was STEEP. Also, are you satisfied with your setup now that you have had a few days to play around with it?
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04-29-2009, 09:49 AM | #43 | |
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Make sure the alignment is included in any quote; otherwise, the job's not complete. Dave
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04-29-2009, 09:50 AM | #44 | |
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Spring installation
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Greg Lake Oswego, Oregon, USA 2023 M2 Coupe - Brooklyn Grey/Cognac/CF, 6MT; 2020 MB GLE 450 Last edited by GregW / Oregon; 04-29-2009 at 10:14 AM.. |
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