Alignment or Suspension Related at 100MPH?

Jhill · 08-11-2017, 05:28 PM

Quote:

Originally Posted by Spooler

I have experienced this. It was the toe settings front and rear. Too much toe in. Not all alignment shops are equal. it is even more noticeable in the rain. The car will plow straight (meaning it is twitching left and right in the front).

Toe in will increase stability as the thrust are towards the center of the car and the toot (toe out on turns) is less drastic. This is why common auto x setup Yun like -1 degree toe up front but the car is twitchy for anything else.

Spooler · 08-11-2017, 08:40 PM

Quote:

Originally Posted by Jhill

Toe in will increase stability as the thrust are towards the center of the car and the toot (toe out on turns) is less drastic. This is why common auto x setup Yun like -1 degree toe up front but the car is twitchy for anything else.

This has just been my experience with the 370z. It is the only real error that can happen on the stock suspension adjustments. As soon as I got the toe set correctly, no more issues. I drive just as fast on the interstate in the pouring down Georgia/Florida heavy rain as I do when it is dry. This is when it is most noticeable to me.

Need4Speeds · 08-14-2017, 08:58 AM

Quote:

Originally Posted by Spooler

This has just been my experience with the 370z. It is the only real error that can happen on the stock suspension adjustments. As soon as I got the toe set correctly, no more issues. I drive just as fast on the interstate in the pouring down Georgia/Florida heavy rain as I do when it is dry. This is when it is most noticeable to me.

Alright, I'm scheduling another alignment check at a different shop that's caters to preping cars for autocross events and what not. I'll get a print out this time and post it up here to see what you guys think about the settings.

jchammond · 08-14-2017, 10:17 AM

Quote:

Originally Posted by Need4Speeds

Alright, I'm scheduling another alignment check at a different shop that's caters to preping cars for autocross events and what not. I'll get a print out this time and post it up here to see what you guys think about the settings.

Sounds good; be sure & have full tank fuel on.

MaysEffect · 08-14-2017, 11:05 AM

Quote:

Originally Posted by Need4Speeds

Alright, I'm scheduling another alignment check at a different shop that's caters to preping cars for autocross events and what not. I'll get a print out this time and post it up here to see what you guys think about the settings.

Be sure they don't get crazy with the settings. In some cases a "autocross" setup implies you fudge up the standard alignment for faster steering and decreased roll in the rear. Do not let them go outside of .5 degrees (either direction) in the front and .3 degrees toe-in rear. You will kill your tires and most likely it will not benefit this car much.

As little camber in the rear, increase camber in the front.

Need4Speeds · 08-14-2017, 11:17 AM

Quote:

Originally Posted by MaysEffect

Be sure they don't get crazy with the settings. In some cases a "autocross" setup implies you fudge up the standard alignment for faster steering and decreased roll in the rear. Do not let them go outside of .5 degrees (either direction) in the front and .3 degrees toe-in rear. You will kill your tires and most likely it will not benefit this car much.

As little camber in the rear, increase camber in the front.

Yes, I agree with you.

Rusty · 08-14-2017, 02:48 PM

Quote:

Originally Posted by Need4Speeds

Yes, I agree with you.

You need a little more toe in. When your toe setting gets close to zero. The car will fell nervous. The faster you go, the worse it gets.

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