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FCM E46 M3 Ride Harmonizer suspension spreadsheet - aka Flatride !!!

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    #91
    Heres some updated numbers and these spring rates are available.
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      #92
      Can anyone help me understand what the difference between "setup 1/2: standard rear spring" and the "setup 3/4: coil-over rear spring"?
      The math that comes out of each option is different and one of them says I am Flat while the other says I am not. Trying to understand which row i am looking at?


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        #93
        Originally posted by Driver407 View Post
        Can anyone help me understand what the difference between "setup 1/2: standard rear spring" and the "setup 3/4: coil-over rear spring"?
        The math that comes out of each option is different and one of them says I am Flat while the other says I am not. Trying to understand which row i am looking at?


        Click image for larger version Name: image.png Views: 203 Size: 35.2 KB ID: 216722
        From my understanding it's a difference in motion ratio which factors into how the frequencies are calculated.
        2005 BMW M3 ZCP Black/Black - HTE Tuning | Kassel CSL DME | 288/280 Schrick Cams+DLC Followers | Lang Head | Dinan TBs | Bosch 550cc | Radium Fuel System | Karbonious CSL Airbox+OE Snorkel | SS V1 Stepped+Catted Sec 1+Resonated Twin Pipe+Race | 3.91, 3 stage clutch | FCM 400/600 | Vorshlag Camber Plates, RSM | Rogue ASP | AKG FCABs, SFBs | TMS Front Sway, Camber Arms, Monoball RTABs, Pullies | Mason Race Strut + X-Brace | AS 30% SSK | SPAL | Redish Plates | Turbo Toys V2 Hub | WPC Rod Bearings

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          #94
          Doesnt really help me understand what is different between the two row types tho.
          Why should I be looking at 1/2 instead of 3/4. What is the bolded label actually mean in relation to the numbers?


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            #95
            Originally posted by Driver407 View Post
            Doesnt really help me understand what is different between the two row types tho.
            Why should I be looking at 1/2 instead of 3/4. What is the bolded label actually mean in relation to the numbers?

            Use the standard setup for the stock e46 configuration where the spring is on the rear perch and separate from the damper.

            Use coilover if you have a setup similar the front suspension where the spring and damper are integrated.
            2005 BMW M3 ZCP Black/Black - HTE Tuning | Kassel CSL DME | 288/280 Schrick Cams+DLC Followers | Lang Head | Dinan TBs | Bosch 550cc | Radium Fuel System | Karbonious CSL Airbox+OE Snorkel | SS V1 Stepped+Catted Sec 1+Resonated Twin Pipe+Race | 3.91, 3 stage clutch | FCM 400/600 | Vorshlag Camber Plates, RSM | Rogue ASP | AKG FCABs, SFBs | TMS Front Sway, Camber Arms, Monoball RTABs, Pullies | Mason Race Strut + X-Brace | AS 30% SSK | SPAL | Redish Plates | Turbo Toys V2 Hub | WPC Rod Bearings

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              #96
              ok, so divorced vs true coilover. Thanks
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