Need help eliminating oversteer

robertkroll · 08-05-2018, 08:43 AM

Quote:

Originally Posted by Rusty

Because of the camber curve being what it is on the Z. Steep. Sometimes I wonder if we are running too much in the rear.

The problem is that with a lowered car, the camber is set at a point in the suspension travel that is typically reserved for a “compressed” state. This leads to rapid and noticeable change in kenimatics when compressed further. This keads many people to over “spring” the car to prevent further geometric progression and loss of grip. This car is NOT designed to be lowered to this degree. I’m thinking of raising the ride height, installing spacers (or even the WiseFab kit). To change the kinematics to favor a bit of squat and body roll.

Rusty · 08-05-2018, 12:43 PM

Quote:

Originally Posted by robertkroll

The problem is that with a lowered car, the camber is set at a point in the suspension travel that is typically reserved for a “compressed” state. This leads to rapid and noticeable change in kenimatics when compressed further. This keads many people to over “spring” the car to prevent further geometric progression and loss of grip. This car is NOT designed to be lowered to this degree. I’m thinking of raising the ride height, installing spacers (or even the WiseFab kit). To change the kinematics to favor a bit of squat and body roll.

I didn't see mention if you had a SPL rear sub-frame bushing kit. If you do. you can add and subtract spacers to change some handling characteristics.

xavier · 06-15-2025, 12:29 PM

Quote:

Originally Posted by robertkroll

The problem is that with a lowered car, the camber is set at a point in the suspension travel that is typically reserved for a “compressed” state. This leads to rapid and noticeable change in kenimatics when compressed further. This keads many people to over “spring” the car to prevent further geometric progression and loss of grip. This car is NOT designed to be lowered to this degree. I’m thinking of raising the ride height, installing spacers (or even the WiseFab kit). To change the kinematics to favor a bit of squat and body roll.

"... This leads to rapid and noticeable changes in kinematics when compressed further. ...This car is NOT designed to be lowered to this degree. ...to change the kinematics to favor a bit of squat and body roll.".

what you means by changes in kinematics ?
without going back to functional dynamics with compensation arms?
or what arms ?

For the camber associated with lowering, there are solutions to add positive camber, to make the wheels vertical, like oem for extrem street use.

For example, I'm thinking of lowering between -36mm and lower... -50mm, with original tires 245/275. approaching a camber of -1.8° to -2° (with ou add positive camber) or more...-2.4. there are solutions to add positive camber. not trackday. 12k or less rear. 14k front. with add positive camber, i will like to obtain 1.2° front, 1.6° rear.

Does your knowledge of the maximum lowering impacting kenimatics permeit this to be resolved with more add positive camber ?

what would you estimate as the maximum lowering to save the kinematics?

with all alignment problem solved, to original alignment, will the kinematics no longer be functional in dynamics?
or.
with or without to add positive camber, what is the maximum lowering limited by functional in dynamics ?

Thanks
Best regards
Xavier

OptionZero · 06-16-2025, 02:16 PM

Quote:

Originally Posted by xavier

"... This leads to rapid and noticeable changes in kinematics when compressed further. ...This car is NOT designed to be lowered to this degree. ...to change the kinematics to favor a bit of squat and body roll.".

what you means by changes in kinematics ?
without going back to functional dynamics with compensation arms?
or what arms ?

For the camber associated with lowering, there are solutions to add positive camber, to make the wheels vertical, like oem for extrem street use.

For example, I'm thinking of lowering between -36mm and lower... -50mm, with original tires 245/275. approaching a camber of -1.8° to -2° (with ou add positive camber) or more...-2.4. there are solutions to add positive camber. not trackday. 12k or less rear. 14k front. with add positive camber, i will like to obtain 1.2° front, 1.6° rear.

Does your knowledge of the maximum lowering impacting kenimatics permeit this to be resolved with more add positive camber ?

what would you estimate as the maximum lowering to save the kinematics?

with all alignment problem solved, to original alignment, will the kinematics no longer be functional in dynamics?
or.
with or without to add positive camber, what is the maximum lowering limited by functional in dynamics ?

Thanks
Best regards
Xavier

is this a street car or a track car?

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