10-15-2022, 06:04 PM
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Senior Club Cobra Member
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Join Date: Feb 2005
Cobra Make, Engine: Contemporary, FE, Tremec TKO 600
Posts: 1,955
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Not Ranked
What does bias ply (Billboards) flat spotting feel like?
I drove the car today. It's been sitting for a very long time (about a year). I've hardly driven the car at all prior to that. I have a set of one year old Billboards on the car. I have really no time experience driving this car, and none at all with the Billboards.
Up to about 15 or so miles per hour, there is no noise, vibration, etc from the car. Once I hit about 20mph, there's a very strong vibration. In the past in the few times I drove the car, this vibration wasn't there. Now it's there. How severe is flat spot vibration? What does it feel/sound like? Could this be the cause of the vibration, or do I need to start looking elsewhere?
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