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Koni FSD's
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03-31-2006, 11:45 AM | #1 |
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Koni FSD's
I wanted to share what is posted on Koni's website:http://www.koni-na.com/display.cfm?m...ubmit=Continue
It says that FSD's are for non lowered suspension's including ZSP. So if your getting new Koni shocks for your E90 zsp or lowered car, go with the sport yellows. Danny
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04-11-2007, 01:51 PM | #2 |
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Danny,
How are they riding compared to your stock zsp? Does it ride smoother over bumps? Im thinking about jumping on a set, but Id like a little more input from people with personal experience, like yourself...
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04-11-2007, 03:42 PM | #3 |
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So people should choose the Yellows if they're lowering the car beyond ZSP height, correct? Does that leave any reason for e90 owners to even consider the FSDs over the stock sport shocks? Just curious.
EDIT: CRUD THIS THREAD IS OLD....NVM...
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04-11-2007, 04:42 PM | #4 |
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But why would Eibach sell their lowering springs with FSD's then? False, advertisement... i want my money back.. =(
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04-11-2007, 05:06 PM | #5 |
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Yea, its a year old...I wanted his input after a years use of on these dampers...
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04-11-2007, 05:08 PM | #6 | |
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Quote:
http://www.e90post.com/forums/showthread.php?t=55574
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04-11-2007, 05:12 PM | #7 |
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Gotcha - but I believe he's been rolling on the Yellows (not FSDs), so he may not have first-hand experience with the FSDs.
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04-11-2007, 05:22 PM | #8 |
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Should've made it more clear, but Im asking about the Yellows.... Fraggy said in the other post that the FSD doesnt work too well with H&R sports springs...
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04-11-2007, 05:28 PM | #9 |
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Does anybody know for sure are the FSDs that come with the Eibach springs different from the ones that are sold separately?
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04-11-2007, 05:31 PM | #10 | |
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Quote:
http://www.koni-na.com/fsd.cfm?
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04-11-2007, 05:38 PM | #11 |
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Isn’t that strange? First they say:
FSD kit must be used with stock height suspension. After that they sell them with lowering springs. |
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04-11-2007, 06:07 PM | #12 | |
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Quote:
Danny
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04-11-2007, 06:16 PM | #13 | |
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If they are lower more than the Eibach springs and are even slightly riding on your bump stops the sytem will go full soft and behave very badly. Orb |
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04-11-2007, 06:27 PM | #14 | |
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Do you have the documentation or proof on that? I would like to check it out, since I have the FSD w/Eibach springsbut think DTM got them seperate instead of the pre-packaged kit
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04-11-2007, 06:32 PM | #15 | |
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Quote:
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04-11-2007, 06:42 PM | #16 | |
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As menetioned in another post I spoke with Koni in Europe about these questions. |
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04-11-2007, 06:44 PM | #17 | |
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Quote:
To adjust, the fronts are traditional in that you can access them from the top with the included knob. The rears however are only internally adjustable, i.e., have to be removed from the car to adjust. Danny
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Last edited by HRC; 04-12-2007 at 12:48 AM.. Reason: harhness to harshness |
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04-12-2007, 11:03 AM | #18 | |
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"The FSD shocks that we put in our FSD/Eibach kits are the same shocks. We just did testing and found the Eibach Pro Kit to be a match with the FSD and therefore created a kit so that the vehicles can be lowered using FSD" and here's my inquiry: "Hi, This question in regards to Koni FSD and Eibach springs. I know you guys have a package that comes with FSD and Eibach prokit. Unfortunately, the shop I went to purchased the shocks and springs seperate and I was later told the FSD shock will only work on stock height and dampening on the FSD kit is different? " So I guess the guessing continues...Koni Europe said one thing and Koni USA another. We won't know for sure until we have the two shocks side by side and compare
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04-12-2007, 02:21 PM | #19 |
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So I shouldn't sell my FSDs for pennies just yet... =)
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04-12-2007, 03:11 PM | #20 | |
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I'm pretty sure they get away with it because the lowering is so mellow. My front end doesn't look nearly as low as the pics (and the ones I had on my e46) of H&R sport. I've still got a good 2-1/2, three if they're small, finger gap up front. |
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04-12-2007, 03:14 PM | #21 |
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This what they say from Koni on the subject:
Yes the same shocks are in the 2100 kits and the 2150 lowering kits. The note about using them with stock height is because when we originally released them that was the information that we had. Also Eibach is the only spring that we have approved for use in conjunction with the FSD. Stoney Hamilton |
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04-12-2007, 09:15 PM | #22 | |
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Thanks for looking into this. I originally called Koni NA but once they knew I was inquiring about the 335i they got hostile and they wouldn’t answer that question so I called Koni Europe and they told me the dampeners are specifically tuned and need short bump stops ect. He went on explaining in detail how the bump stops are the problem with the FSD valving so I am bit surprised if he is wrong but I rather have the facts.
Like you said if the part numbers on the shock are the same then it is fact and not hear say. If the shocks are indeed the same then Koni is saying that the dampeners can work on NON sport spring to the Eibach spring which is about 35%-40% stiffer. The fact the system still uses a shim system with a special pressure chamber still means that more dampening is needed so stiffer shims are required. There will be an off set in the slew rate for sure with stiffer springs (parallel valve cross over point). It might explain why people get mixed results with the system as it might not be optimized. From a mechanical point of view it the system does look to be very sensitive to mass and spring rate and not easy to tune. Orb Quote:
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