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Old 04-26-2010, 12:05 PM
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Driveability question on Camaro Clip

59 Suburban with 74 camaro subframe.
Just had it aligned. Everything is to factory spec except the castor. Factory recommends -1 to +1
Actual adjustment -4
Is this 3 going to make a huge difference?
Thanks, Garrett

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Old 04-26-2010, 02:59 PM
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Yes, negative 4 degrees caster will make the steering very very twitchy at highway speeds. It needs to be corrected to at least 1 degree positive, I usually run 2 1/2 to 3 degrees positive caster on a front end such as yours. Set the camber to 1/2 degree negative. Don't bother with the factory specs.
Finish with 1/8" toe-in and you will be on the right track.

Andy
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Old 04-27-2010, 09:59 AM
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It definitely drives better after the alignment. It is still twitchy above 70 though. I'm looking at replacing the upper control arms to correct the castor problem
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Old 04-27-2010, 10:57 AM
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The more positive you can go on caster, the more stable at high speeds. Negative can not only be twitchy, it can lead to shimmy. 3-4 degrees is a good ballpark for power steering. 4 degrees with manual steering can start to get tiring in a lot parking lot maneuvers. If you even remotely like driving it at -3, you'll fall in love at +3. Keep both sides close with a .5 degree split with the lower number on the side of the road crown. The front end will drift to the lower number and that drift is just right with a normally crowned road to not pull in either direction.
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Old 04-27-2010, 08:32 PM
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You guys rock
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