High front spring rate no front sway bar

m3gang · 03-25-2021, 03:46 PM

I'm wondering if anyone tried running high front spring rate with no front sway bar? If yes, how does it feel? Reduce understeer? I'm running 700F/800R.

tsk94 · 03-25-2021, 05:39 PM

Running a higher front spring rate with no sway bar will perform the same as a lower front spring rate + a sway bar in terms of mid corner handling balance - assuming the increase in front spring rate is roughly equivalent to loss in bar rate.

Dive under braking and ride quality (compliance over bumps) will change if increasing the front spring rate and removing the sway bar.

What exactly is your goal/what are you looking to fix?
Just to reduce understeer? That will depend on how much you're increasing the spring rate. But most likely no, it will not reduce understeer.

m3gang · 03-25-2021, 08:08 PM

Thank you for the response! My goal is to reduce understeer from running a sway bar with my 700F spring rate. I'd assume running no sway bar vs sway bar with the same spring rate will somewhat effect understeer? Do you happen to know what the stock front sway bar's spring rate is?

tsk94 · 03-25-2021, 08:16 PM

Quote:

Originally Posted by m3gang

Thank you for the response! My goal is to reduce understeer from running a sway bar with my 700F spring rate. I'd assume running no sway bar vs sway bar with the same spring rate will somewhat effect understeer? Do you happen to know what the stock front sway bar's spring rate is?

Keeping the spring rate the same and removing the sway bar will change the handling balance. Understeer will be reduced if you remove the sway bar and leave the springs as is.

Stock front sway bar is ~195lb/in

m3gang · 03-25-2021, 08:30 PM

Okay, thank you so much! I see that most people are running a 300 difference so I think it'll be perfect for me to try the setup with the front bar removed since I'm running 700F/800R and the bar is around 200.

CPWINCH · 03-29-2021, 12:41 PM

Quote:

Originally Posted by m3gang

Okay, thank you so much! I see that most people are running a 300 difference so I think it'll be perfect for me to try the setup with the front bar removed since I'm running 700F/800R and the bar is around 200.

seems like a backwards approach. Why not just run proper spring combo? switch the fronts to 650f

03-25-2021, 03:46 PM	#1
m3gang Private 23 Rep 50 Posts Drives: BMW E92 M3 Join Date: Mar 2019 Location: Norcal iTrader: (0)	High front spring rate no front sway bar I'm wondering if anyone tried running high front spring rate with no front sway bar? If yes, how does it feel? Reduce understeer? I'm running 700F/800R.
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03-25-2021, 05:39 PM	#2
tsk94 Lieutenant Colonel 1526 Rep 1,597 Posts Drives: E92 M3, E82 128i, F82 M4, E36 Join Date: May 2017 Location: Calgary iTrader: (2)	Running a higher front spring rate with no sway bar will perform the same as a lower front spring rate + a sway bar in terms of mid corner handling balance - assuming the increase in front spring rate is roughly equivalent to loss in bar rate. Dive under braking and ride quality (compliance over bumps) will change if increasing the front spring rate and removing the sway bar. What exactly is your goal/what are you looking to fix? Just to reduce understeer? That will depend on how much you're increasing the spring rate. But most likely no, it will not reduce understeer. Last edited by tsk94; 03-25-2021 at 05:49 PM..
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03-25-2021, 08:08 PM	#3
m3gang Private 23 Rep 50 Posts Drives: BMW E92 M3 Join Date: Mar 2019 Location: Norcal iTrader: (0)	Thank you for the response! My goal is to reduce understeer from running a sway bar with my 700F spring rate. I'd assume running no sway bar vs sway bar with the same spring rate will somewhat effect understeer? Do you happen to know what the stock front sway bar's spring rate is?
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03-25-2021, 08:30 PM	#5
m3gang Private 23 Rep 50 Posts Drives: BMW E92 M3 Join Date: Mar 2019 Location: Norcal iTrader: (0)	Okay, thank you so much! I see that most people are running a 300 difference so I think it'll be perfect for me to try the setup with the front bar removed since I'm running 700F/800R and the bar is around 200.
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