Vibration issue

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Apr 27, 2014 | 07:33 AM

Brday1305

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4th Gear

Joined: Apr 2014

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Vibration issue

I have a 1991. I've noticed the last 3 times I've had the car out that at 83-85 mph, there is a strong vibration. Get to 90 none. It is consistent at that speed. Any suggestions on possible causes?

Apr 27, 2014 | 08:18 AM

Tapio@FTTRacing

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Joined: Jul 2013

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Quote:

Originally Posted by Brday1305

I have a 1991. I've noticed the last 3 times I've had the car out that at 83-85 mph, there is a strong vibration. Get to 90 none. It is consistent at that speed. Any suggestions on possible causes?

If it's speed related and not rpm related, I would say your wheels/tires are not balanced

Apr 27, 2014 | 11:32 AM

Retxpres

Instructor

Joined: Feb 2012

Posts: 224

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From: Mount Sinai NY

Quote:

Originally Posted by Brday1305

I have a 1991. I've noticed the last 3 times I've had the car out that at 83-85 mph, there is a strong vibration. Get to 90 none. It is consistent at that speed. Any suggestions on possible causes?

Just went through a similar situation. First have you changed the wheels or tires recently? Second, tires get old and the rubber gets hard. How old are your tires? They have a date on them. The date consist of two numbers. The first is the week of the year and the second is the year. Tires should not be dated more than six years old from today's date. Does not matter if they were on the car or on the shelf.

Apr 27, 2014 | 12:06 PM

BOOT77

Melting Slicks

Joined: Nov 2010

Posts: 2,216

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From: Michigan

Did you just get the car out after sitting?

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