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

[Obioban]

Shaikh just replied to my email and said he'll start posting on here soon.

This is a great tool that I have been playing with over the past few months. Any additional guidance on what Bounce Freq and FRC we should be targeting? Perhaps we can list a few numbers based on street, sport, and track performance. If those who run flat ride setups can share their suspension setups and spring rates, that would really help!

Talking about spring rates kind of defeats the purpose of the spread sheet! The point of it is to target frequencies. Frequencies are influenced by spring rates, but also by wheel offsets, corner weights, unsprung mass, etc!

I'm currently at 1.92hz front, 2.06hz rear, with 4647 lb-ft/deg (off bump stop) of front roll stiffness and 1237 lb-ft/deg (off bump stop) of rear roll stiffness (vs 1688/809 off bump stop stock).

But, the springs and sways that got me there are unlikely to be the same as what would get you there.
(in 3071 lb car that's a bit front heavy and no longer has the counterbalancing battery on the passenger side, with my wheel offsets/sizes, 350 FL, 325 FR, 700 LR, 628 RR-- staggered left/right so I have equal frequencies left right)

[duracellttu]

This is a great tool that I have been playing with over the past few months. Any additional guidance on what Bounce Freq and FRC we should be targeting? Perhaps we can list a few numbers based on street, sport, and track performance. If those who run flat ride setups can share their suspension setups and spring rates, that would really help!

[Obioban]

I just sent an email to the owner of FCM to hopefully get him on to this new forum.

[Radekxpl]

This spreadsheet has been one of the most game changing things for the dynamics of my car. Whether or not you are on board with flat ride being beneficial (I am), this spreadsheet finally lets you get concrete numbers about what changes you're making actually do in your specific car, and what the end result is, in a way that can be compared to other cars (unlike, say, spring rates).

It's just freaking wonderful.

Well said 👌👍👍

[Obioban]

This spreadsheet has been one of the most game changing things for the dynamics of my car. Whether or not you are on board with flat ride being beneficial (I am), this spreadsheet finally lets you get concrete numbers about what changes you're making actually do in your specific car, and what the end result is, in a way that can be compared to other cars (unlike, say, spring rates).

It's just freaking wonderful.

[Radekxpl]

One thing that was missing from this new forum so far was - FCM E46 M3 Ride Harmonizer suspension spreadsheet - aka Flatride

For all people using this amazing flatride concept to share, discuss, and fine tune their setups.

Here it is:
http://www.fatcatmotorsports.com/FCM..._M3_Online.htm