Stiff Front Sway Bar Thoughts

cv129

Sway bar controls/restricts lateral weight transfers. It’s not a one size fits all. Driver’s skill, understanding, spring rate, tire size and compound, camber (and the subsequent camber curve) all work toward a result.

Too much weight transfer too quickly (disconnect the front sway), lateral momentum from the direction change will overwhelm the front tires, cause understeer.

Too little weight transfer (bar uber stiff but without grippier tire), then the outer front tire doesn’t get enough downward push, and you can get understeer as well. This is where skills and understanding comes in.

Someone that well versed trail braking and keep weight to the front, pushing the front down while changing direction, left foot brake to manipulate weight transfer during mid corner acceleration, a stiffer bar probably does great even with stock suspension. (Who was the member that drove for motoIQ, forgot his name…)

But for mortals that can’t dissect every milliseconds on the fly while going thru corners at triple digits, results will vary.

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Setrab | RE-71 | SPL | JRZ | Nismo | ARK | Whiteline | RacingBrake | CJM Oil Pan | Ti shield

Averying

Not trying to keep this thread going for no reason (although this one is probably immortal), but to clarify with a stiffer bar, the outside tire is getting MORE downward push. Sway bar transfers load from the inside to the outside tire, resulting in more uneven load distribution. So ideally you’d want as little sway bar as possible so you get the most even load distribution between tires… =max grip


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AH370Z

Exactly and if you are undertired in size, compound and camber you will reach its limits and understeer. The wet will be even worse which is why some even disconnect sway bars and soften springs at the track (in general not sure about 370z)

I'm currently still tuning my Koni/swift setup and with the whiteline in soft (35% stiffer) -2.0 camber and jumping up from 50% firmer damping to 75% up front it is feeling much more direct and no push as with the stiffer bar.

cv129

Just so I interpret correctly on “inside” and “outside”, for example…

In a right hand turn (steering wheel turning right), right front would be inside, left front would be outside?

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Setrab | RE-71 | SPL | JRZ | Nismo | ARK | Whiteline | RacingBrake | CJM Oil Pan | Ti shield

2011 Nismo#91

Inside should be the side of the car nearest to the corner.

You can write a book on suspension tuning and modification and people have. It's not something you can merely cover in a few sentences in a post. Read up on it, cv129 as posted the best concise explanation so far. But if you really want to know and educate yourself read a book.

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cv129

Mucho Gracias

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Setrab | RE-71 | SPL | JRZ | Nismo | ARK | Whiteline | RacingBrake | CJM Oil Pan | Ti shield