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Old 09-11-2017, 03:15 PM   #8
Nathan_1929
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Join Date: Mar 2015
Location: Saint Louis, Los Angeles
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Default Re: Stainless exhaust pipe rattle won't stop!

Quote:
Originally Posted by Dodge View Post
In some cars the exhaust will grow several inches.
No way, unless it's made out of rubber.

Quote:
Originally Posted by katy View Post
What does "In general (10-6 in/in/ deg F)" mean?
Sounds like he's describing the coefficient of thermal expansion (CTE) for different metals. 10^-6 is scientific notation, and in/in is the unitless coefficient, per degree F. Another way of looking at it is as microinch per inch per degree F.

So, he's saying the CTE for stainless is 0.00001 in/in per degree F. What I'm seeing elsewhere is, based on the alloy of stainless, linear CTE is somewhere between 5 to 10 * 10^-6 /deg F.

What does this tell us? Someone should just measure their tail-pipe hot and cold based on a known datum and tell us how much it lengthens. I'd guess very little.
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