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  1. #1
    ISLAND RACING seadoo951's Avatar
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    t-304 stainless steel

    I am having a custom exhasut built and I was told that 304 stainless steel tubing is the least corrosive. I am running in 100% salt water and I know that there will be salt water in there as long as I am running the motor. I also flush the ski after every ride and that should get rid of a lot of the salt water. Does anyone know of any chemical or substance I could coat the internals of the pipe with in order to have it not rust on the inside?


  2. #2

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    Cool

    316 better,take a look at this http://www.cheresources.com/sspasszz.shtml

    hope it helps

    late cd

  3. #3
    Never say never KirkF350's Avatar
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    I agree, 316 SS would be much better than 304.
    Also, do a search on Glisten PC. This is an industrial coating/pertectant.
    I do not know a lot about it, but we spray components that go into offshore applications with this stuff. This was a requirement of one of the drilling companies we sell to. I just do not know how it will hold up to the heat of the exhaust. Hopefully this can get you in the direction you want to go.

  4. #4

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    Cool

    allso check this out(for you supercharger guys this would help too!

    http://www.jet-hot.com/Pages/coatings.html
    Glisten PC clear coat neat,but look like won't take heat
    later cd

  5. #5
    yeah, ceramic coating would be the way to go. But he will be fine with T304, it`s still alot better than the 400 series SS.
    T304 exhaust pipe is pretty darn thick, it`s thicker that aluminized pipe. Let`s just ask the experts here: HOSS is a expert exhaust tech and knows his chit! he can best answer this for ya!...PR...

  6. #6
    HOSS's Avatar
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    304 is perfect for exhaust. 316 thin wall pipe is no good for exhaust (only exhaust) in this application because of the amount of chromium which makes the 316 stainless much more brittle and prone to cracks. Exhaust takes alot of vibrations just from harmonics themselves. This is why 304 is much more common in exhaust applications. In shipbuilding its different because its not thin wall tubing.

    304 is the way to go as this is what I use also. Funny thing is that I still use my Riva plastic pipe. I will (maybe) start working on my 304 exhaust system soon. Only reson for that is to have access to the sc. People ask me why I still use the Riva plastic pipe even though I own a tubing bender. Simple: why mess with something that works. I run a stock ecu so exhaust temps are never that high and I`m not running lean with the Riva S3 now that I`ve got 42`s on.

  7. #7
    ISLAND RACING seadoo951's Avatar
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    Thanks for all the replies guys. So I guess I made the right choice with the 304. I ordered it today and should have it by the end of this week or the beginning of next week.

  8. #8

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    316-L is good but duplex is the best stainless steel for highly corrosive conditions

  9. #9
    HOSS's Avatar
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    316 stainless is marine grade and mandated. The more chromium, the more brittle.

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