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Discussion Starter · #1 ·
Looking at some alternatives for the 4c.. Don't want to keep replacing them because NYC roads are so bad.. bent struts.. bent wheels... :facepalm:

Just thinking about posibilities via "tricking the 4c" thread...

What do you guys think about the Koni FSD? Ill look into other alternatives.. Just thinking right now on all my options..


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The first shock absorber offering superior road-holding without compromising comfort.

KONI introduces FSD, the first no-compromise shock absorber in the world. A revolutionary new technique which combines the benefits of firm and comfortable suspension in a single perfect shock absorber. Firm for sporty driving on even road surfaces. Comfortable for a smooth ride on uneven road surfaces.

Realizing the seemingly impossible!

Two characteristics that seemed diametrically- opposed, proved to be a source of inspiration for specialists from KONI. Following lengthy development and testing, the ultimate solution was reached: KONI FSD - Frequency Selective Damping.

A revolutionary new technique whereby the benefits of both types of ride characteristics are combined in one perfect shock absorber. Banishing the disadvantages of the past. FSD shock absorbers; a smart suspension system adjusting automatically to road conditions as well as driving style. And all of this in a fraction of a second. FSD guarantees greater stability, greater control and thus greater driving pleasure.

KONI reconfirms with the FSD innovation a leading position as innovative supplier of high-quality shock absorber products.

Most shock absorbers are designed to offer a firmer ride OR to maximize ride comfort. And complete computerized systems can deliver both comfort and performance, but at too high a price for the average consumer's vehicle.

The KONI FSD (Frequency Selective Damping) shock combines excellent road holding and handing characteristics with no-compromise comfort levels. It's a two-in-one solution from KONI that doesn't require the installation of sophisticated electronics, cables or sensors. Firmness for sporty driving on even road surfaces. Smoothness for a comfortable ride on uneven road surfaces.

It's possible via KONI's patented Frequency Selective Damping technology - technology that actively controls the damping level on the basis of the vehicle's body and suspension movement frequency. FSD shocks are a smart suspension system that adjusts automatically and in a fraction of a second to road conditions and driving style.

How It Works




In standard shock absorbers the main damping characteristic is defined by the oil flow going through the piston assembly (1).

Combining it with the FSD feature (2), KONI added a special valve that controls an oil flow parallel to the one going through the piston rod (3). This parallel oil flow is closed by the FSD feature, giving a rise in damping force almost linear to the time that the piston is moving in one direction

Put simply: the FSD feature is a hydraulic amplifier that delays the build up of pressure. In some ways an extra tuning option has been created in order to get the best possible combination of handling and comfort.

Since it is an integrated part of the hydraulic valve system inside the damper, no additional cables, sensors or any other electronic devices are needed to operate an FSD damper. Read more in Dynamic Dampers.


Advantages of FSD

› Ends the compromise between comfort and handling
› Can be integrated in conventional damper layouts
› No need for sensors, cables, or other electronic devices
› Creates an additional variable in fine-tuning the car’s behaviour
› Quick and easy to develop for existing suspensions
› Damper cost efficient
 

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i wish you could use a newer version of the 4C shock cause I'm sure the design of them has improved over time to become more reliable.
 

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Do they have a rear shock for the AWD models?
 

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i wish you could use a newer version of the 4C shock cause I'm sure the design of them has improved over time to become more reliable.
Idk about you but I'm at 110k on original struts and they're still going strong.....That's pretty damn reliable when the majority of cars I know of go at about 70-80k
 

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AAAckk I hope I'm special too, mines at 72K and the struts aren't leaking yet. Now to find some wood to knock...
 

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Mine are at almost 90k no problems so far, but I would be open to non 4c options since I could still use the buttons for ARD multi-mapping :D
 

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Discussion Starter · #8 ·
if these konis are really self adjusting i wouldn't mind them at all... and yes having the 4c buttons used for multimapping is going to be sweet. But I am going to look more into self adjusting shocks.. I want my car lowered with a wide stance... I have 89k on my car.. and the suspension has seen better days. Probably need to get all my bushings done too.. Mine arent leaking.. they're just bent.. NYR's strut got bent to from these roads.
 

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So how hard/expensive is it to trick 4c anyways??
 

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Ill have to look further into this.. didn't take into account the awd.
The "JanHargis method of tricking the 4C suspension" was only used on the front struts. IIRC, he left his rear 4C shocks in place, still connected to the system. Seems to me that the rear shocks are a bit beefier than the struts, and last a little longer. So, you could just switch out the fronts & leave the rears,
 

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Discussion Starter · #13 ·
The "JanHargis method of tricking the 4C suspension" was only used on the front struts. IIRC, he left his rear 4C shocks in place, still connected to the system. Seems to me that the rear shocks are a bit beefier than the struts, and last a little longer. So, you could just switch out the fronts & leave the rears,
yup.. That's what I was thinking.. as long as my rears are ok, they'll stay on..
 

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Mine arent leaking.. they're just bent.. NYR's strut got bent to from these roads.
I've seen this mentioned before, what gets bent, the shaft, body, other? Is it a 'you can't miss it' type of thing? Just want to know what to look for.

Ill have to look further into this.. didn't take into account the awd.
I tried to look on Koni's website, but its product finder keeps getting stuck for me... I ran into the same issue with Bilsteins, no rear shock for the AWD.

Too bad that the HLS system is so expensive. At $3.7K just for that system not including coilovers, I would rather just scrape around town.
I'd be interested in the relatively simpler V2's, but $2,000+ still kind of takes my breath away. I'll just have to see where I'm at if/when my car needs shocks. Even going with new 4C's from Tasca/Rock Auto 4C's would cost some $800-900 less, which could be used for other mods. But the positive reviews of KW installs on other cars is kind of compelling...
 

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Discussion Starter · #18 ·
I think if you go the koni fsd route.. The fronts will be fsds and the rears might have to be koni sports... Or just stock ones in the back...Do our Rs have self leveling rear shocks?
 

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I live in NY as well and met you at the Paramus meet. I had the KW v2 on my 855 and they were great handling however on the crappy NY roads that we have I found them to be harsh for every day commuting. I switched them out for the eibach/bilstein setup lost some handling but was more liveable.
 
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