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Autocross alignments are good for normal fast roads etc :)

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Old 11-27-2008, 08:40 PM
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steve40th
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Default Autocross alignments are NOT good for normal fast roads etc :)

My corvette, 93 type, with an autocross aggressive alignment doesnt do well on high speed breaking and cornering here in Hawaii on the twistys.
Just my observation

Last edited by steve40th; 11-30-2008 at 08:31 PM.
Old 11-30-2008, 08:33 PM
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The back end likes to get twitchy at the point of high speed braking (45-60mph) and then trying to turn, is this normal for an autocross alignement at higher speeds than at low speeds such as tight autocross, 15-30 mph?
My aligment is -2.2 front with 1/16 toe out and -1.7 rear camber with 1/16 toe in.
Old 12-01-2008, 09:16 AM
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UstaB-GS549
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It's possible that your rear toe-in, changes to toe-out under heavy braking which will make car unstable. Maybe you need more static toe in to prevent this from happening.
Old 12-01-2008, 09:27 AM
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Bill Hetzel
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Originally Posted by UstaB-GS549
It's possible that your rear toe-in, changes to toe-out under heavy braking which will make car unstable. Maybe you need more static toe in to prevent this from happening.
Yep, that's possible.
You won't really know without putting a bumpsteer gage on.
Old 12-01-2008, 10:12 AM
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Originally Posted by Bill Hetzel
Yep, that's possible.
You won't really know without putting a bumpsteer gage on.
More toe, or spherical rod end camber/tir rod bars.
Old 12-01-2008, 10:46 AM
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Bill Dearborn
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My C5 Z starting doing that at the end of the season. The problem turned out to be both rear tie rods. Each had about an 1/8 in play when measured at the rim. Nothing like the rear toe changing while you are braking or cornering.

Bill
Old 12-01-2008, 11:01 AM
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steve40th
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Originally Posted by Bill Dearborn
My C5 Z starting doing that at the end of the season. The problem turned out to be both rear tie rods. Each had about an 1/8 in play when measured at the rim. Nothing like the rear toe changing while you are braking or cornering.

Bill
Well my tie rods in the rear are KINDA old, oops
Old 12-01-2008, 11:43 AM
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Originally Posted by Bill Dearborn
My C5 Z starting doing that at the end of the season. The problem turned out to be both rear tie rods. Each had about an 1/8 in play when measured at the rim. Nothing like the rear toe changing while you are braking or cornering.

Bill
How many miles on it when you noticed that?
Old 12-01-2008, 01:25 PM
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steve40th
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Originally Posted by froggy47
How many miles on it when you noticed that?
I can neither confrim nor deny the fact its been like this for a while, but I just started really noticeing it as I am autocrossing and practing more , yet at higher speeds.
Usually I dont run roads fast here.
140000 miles on rear toe rods.

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