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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 07-08-2021, 09:56 PM   #15
NoHaveMSG
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lol...


you totally win
My response was slow. 3/10, would not bang.

Is it really winning in banter
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Old 07-08-2021, 10:08 PM   #16
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My response was slow. 3/10, would not bang.

Is it really winning in banter
it's win/win winning
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Old 07-09-2021, 08:28 AM   #17
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A drill wire brush goes a long way cleaning that up.
I periodically hit flanges and pipes to clean up the metal a bit.
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Old 07-09-2021, 09:52 PM   #18
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A drill wire brush goes a long way cleaning that up.
I periodically hit flanges and pipes to clean up the metal a bit.
that method also continually exposes a fresh layer of metal to the same demise...
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Old 07-10-2021, 03:25 AM   #19
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You can wet it with nitric acid, then neutralize and clean. It will delay the corrosion by dissolving the free irons in the surface of the material. Thatís a lot of work for a part that is still going to last another 20 years with no additional work.


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Old 07-10-2021, 03:22 PM   #20
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You can wet it with nitric acid, then neutralize and clean. It will delay the corrosion by dissolving the free irons in the surface of the material. That’s a lot of work for a part that is still going to last another 20 years with no additional work.


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That's true. I could wipe it down with some citric acid and sand it all down, and then hit it with some anti rust spray or something, but it's probably not worth worrying too much about.
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Old 07-10-2021, 03:28 PM   #21
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Originally Posted by NoHaveMSG View Post
You can wet it with nitric acid, then neutralize and clean. It will delay the corrosion by dissolving the free irons in the surface of the material. Thatís a lot of work for a part that is still going to last another 20 years with no additional work.


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So at home passivating? I donít think that works on aluminized steels
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Old 07-10-2021, 05:17 PM   #22
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So at home passivating? I donít think that works on aluminized steels

Yeah, for the mid pipe. Nothing you can do for the muffler but paint it.
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Old 07-10-2021, 05:23 PM   #23
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Yeah, for the mid pipe. Nothing you can do for the muffler but paint it.

Do we know whatís made of what? I didnít think OEMs used stainless in exhausts at all.
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Old 07-10-2021, 06:17 PM   #24
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Do we know whatís made of what? I didnít think OEMs used stainless in exhausts at all.

Itís stainless until the rear muffler. Dunno what
grade.


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Old 07-11-2021, 07:50 PM   #25
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Muffler Stainless Steel

"Itís stainless until the rear muffler. Dunno what
grade."

Mufflers and pipes are often made of 409 stainless steel by manufacturers. it has a lot less nickel so it is much cheaper. It does surface rust and will flake off but does not often get holes like carbon steel pipes.

The first uses of 409 in exhaust systems was probably on industrial exhaust systems like for industrial gas turbines. Silencers for gas turbines is where I first saw it.
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