Scootsmcgreggor
Well-Known Member
Interesting thanks.
Sponsored
A bug rear sway bar causes instability at low speeds?Yes, that's too much unless you have substantial front spring rate. Obviously that's not the only part of the setup that matters for this, but it definitely contributes significantly.
Stock GT PP/EB PP bars are a good spot to be in.
It can, yes, depending on the rest of the car setup.A bug rear sway bar causes instability at low speeds?
A stiffer rear swaybar will generally reduce the grip on that end of the car, yes.A bug rear sway bar causes instability at low speeds?
Yup! They're a fine tuning device.but the general rule of thumb is that making a swaybar stiffer reduces grip on that end of the car. Bigger isn't always better. You want as much as you need and not more.
Easy way to decide if this is helping or hurting is whether you are waiting for the car to settle before getting on the gas or are you able to gas out as planned.Had a technical question. Some tight hair pins I clip I noticed that the back becomes a little loose (is this what "lively" means?) Which I don't really mind as much because I am still on the correct racing line. However, I was told from someone with way more experience than I that sliding is not fast. So if my rear becomes a little loose then that is an indication of entering the corner too fast?
Is what I am experiencing called oversteer where more speed equals a power slide or is this what Randy Pobst calls rotation?
Good post.A stiffer rear swaybar will generally reduce the grip on that end of the car, yes.
You use stiffer swaybars to keep overall body roll in check, or to make a car transition from side to side faster than the springs alone will allow, or to fine tune oversteer/understeer balance, but the general rule of thumb is that making a swaybar stiffer reduces grip on that end of the car. Bigger isn't always better. You want as much as you need and not more.
If you're used to racecars looking like they have no body roll, its because those cars also have aero and may need to keep the front low and close to the ground for aero purposes, not because a flat car develops more grip, because aero aside, they don't.
Yup! They're a fine tuning device.
It's often you see SCCA street class/stock class cars using swaybars as a little bit of a crutch to get some roll stiffness on cars with very soft springs. In those cases, it's often that the improvement to dynamic geometry and responsiveness outweighs the theoretical grip reduction from lateral load transfer.
I'd say that's an issue with the dampers being too stiff or having the rebound set incorrectly. But I'm not an expert like some others in here.Brian,
What charactoristic of a suspension in the midcorner through corner exit that causes the car to feel like the slip angle is good but the chassis skips over the tarmac like a rock skipping on the surface of a lake? Is this too much spring not enough bar? Can shock settings be helpful?
In my experience that behavior is actually too much bar as a portion of the roll stiffness and/or bad damper match. Too much compression and rebound damping, possibly.Brian,
What charactoristic of a suspension in the midcorner through corner exit that causes the car to feel like the slip angle is good but the chassis skips over the tarmac like a rock skipping on the surface of a lake? Is this too much spring not enough bar? Can shock settings be helpful?