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Ohlins Road & Track e90 spring rates - they look strange to me, what do you think ?
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10-28-2011, 05:34 PM | #1 |
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Ohlins Road & Track e90 spring rates - they look strange to me, what do you think ?
Hi,
I asked Ohlins about their Road & Track suspension spring rates and they gave me the following information: Front: 400 lb/in (70N/mm) Rear: 343 lb/in (60N/mm) I am no expert in spring rates, but from what I read on this forum, the rear spring rate is really low, this means that the rear springs are soft. What do you think ? I am thinking of getting a good suspension setup like the Ohlins and as I am trying to learn more about the spring rates, this setup comes up as surprising compared to others. |
10-28-2011, 05:52 PM | #2 |
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That is insanely low for the rear..front looks spot on.
Contact Harold at www.hpashop.com He sells these and will know for sure..but I dont think that figure is correct for the rear |
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10-29-2011, 01:55 AM | #4 | |
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OP, if you decide to go this route, talk to Harold and when ordering the swift springs, don't go with the 10" rears, go 8s. I went with the 10's and made my car sit too high even on the lowest settings. As per ohlin, you do not have to revalve either. |
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10-29-2011, 09:24 AM | #5 |
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I am not planning to get Swift springs, if I get the Ohlins suspension I will try to get the springs from Ohlins too, especially given the fact that they can deliver any spring rates.
But I'm still wondering, why would Ohlins choose these spring rates in the rear ? PS: I am looking for suspension that is good for drag racing and street, not circuit driving. If it's soft, its ok but I want it to be "balanced". |
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10-31-2011, 06:04 PM | #6 | |
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It would be the 9" Swift for the back of the E9x. We like to use the higher quality Swift springs along with thrust sheets. A photo below with Swift springs, thrust sheets, and the more robust height adjusters. Ohlins just released BMS MI01 with improved valving and 70N/mm front and 120N/mm rear springs. Last edited by HP Autosport; 01-28-2020 at 11:36 AM.. |
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11-02-2011, 07:55 AM | #7 | |
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11-02-2011, 08:03 AM | #8 |
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could you PM me the price for the springs/thrust sheets/height adjusters ?
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11-02-2011, 11:37 AM | #9 |
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fwiw, those rear rates are softer than stock rear zsp rates, which are 460 lb/in. The shock compression damping may be able to account for this somewhat, but generally, you don't want softer rear springs than stock, especially if you are going stiffer than stock in the front.
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11-02-2011, 12:05 PM | #10 | |
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In my case, just to give an example, I know that I'll be tracking the car mostly on the Nürburgring which is far from flat and has lots of bumps. For such a circuit, a high spring rate is counterproductive as it will unsettle the car, and you may actually be faster with the spring rate the set comes with. I'll also go with the Öhlins next spring, and will test first the original spring rate before making any modifications. Alpina_B3_lUX
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02-23-2012, 05:55 PM | #11 |
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02-24-2012, 04:22 AM | #12 |
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Im still trying to sort out a problem with the brakes so Ive been putting off the proper review untill all is good and I can really push it.. also at the track.
However, very briefly I need to admit it is a big improvement. Especialy with the rear. Just to give everyone a sense of how soft the ohlins suplied springs were - I did experience rubbing in the back with a 15mm spacer ! unacceptable! When on old springs, I had the suspension set at 3/4 on the stiffer side. It proved to be a bit too rough with new swift springs (392/784) on a daily basis. It is set right in the middle of the scale now and feels just right. I have also replaced the rear subframe rubber and front suspension parts for 'M' ones. That together with the spring update greatly improves your connection with the road surface. And it doesnt happen in an uncomfortable way. (Harold you should be selling this as a set! ) Personaly I am happy with the ride quality and I know I will be stiffening up the suspension a little bit for the track - probably 3/4 on the stiff side again. However if one has a very delicate and sensitive bottom (or a wife/girlfriend with one) a 336/672 combo might be sufficient. Bottom line: Ohlins+Swift is a great match! But do expect a more detailed review once my brakes allow me to put the suspension to a more versatile test. Harold, thanks putting up with me and all the questions again! I can be a handfull
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02-24-2012, 04:16 PM | #14 | |
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As much as I love to sell the Ohlins kit this way, it also increases the price and is not for everyone's wallet. Some are actually okay with just the out of the box kit. Although most opt for the upgrade right away or after a track day or two. If Ohlins would supply the struts and dampers only, I can then price this kit reasonably for the community. |
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02-25-2012, 07:41 AM | #15 | |
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02-25-2012, 11:14 AM | #16 | |
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We have tried the same with Ohlins USA to buy only the struts and dampers only to be used with Swift springs and our hardware, but without any luck. However, I was told this may change down the road so there is hope. KW is the same way, but even tougher to work with. In addition, they actually took our idea and made kits of their own and try to make us buy them...NO WAY! They are still wondering to this date why those kits don't sell! People want Swift springs with the option to choose their own spring rates, not an off of the shelf kit with KW springs. AST and Koni are great to work with to get struts and dampers in just about any configuration with or without springs. Moton and JRZ are very easy to work with as well since most of the dampers are custom anyway. |
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02-25-2012, 07:24 PM | #17 | |
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02-28-2012, 03:29 AM | #18 | |
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I've only got the Öhlins kit installed a few weeks ago and haven't been able to drive much (and my car has been in the garage again for two weeks lately), let alone get it onto a track. But so far the out-of-the-box version of it seems really fine. It's much more comfortable than the Bilstein B16 I had previously, while still being fantastic in handling. Totally unperturbed if you throw it into corners fast or do some quick manoeuvres involving direction changes. For now I don't feel that I have to upgrade the rear springs in particular, but we'll see in a few months once I've been to the track a few times. Alpina_B3_Lux
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02-28-2012, 07:04 AM | #19 | |
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I know I've been promising you a review a while ago, but I wanted to wait untill I had some more answers to my own questions Are you planning to go to the ring track day organised by Dino? (16 June?)
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335 - Öhlins//Swift//M3 front suspension//M3 subframe bushes//Quaife LSD//AR Design Catless//Forge Intercooler//Alcon BBK//Goodridge//AFE//RPI//Fenders - SOLD M4-Mineral Gray/Full Shakir Orange/DCT/M Ceramic/M Adaptive Susp. |
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02-28-2012, 07:20 AM | #20 | |
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Will you come too then in June? Alpina_B3_Lux
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02-28-2012, 07:27 AM | #21 |
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Harold, which front/rear combo were you advising me to get, do you remember? 784 in the rear seems a bit high for me, I believe you recommended a slightly lower spring rate.
Just to remember in case I will go down this route. Alpina_B3_Lux
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02-28-2012, 10:14 AM | #22 | |
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Ohlins just released BMS MI01 with improved valving and 70N/mm front and 120N/mm rear springs. Last edited by HP Autosport; 01-28-2020 at 11:37 AM.. |
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