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Who is using Coated pistons?

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    #1

    Who is using Coated pistons?

    Is coating pistons really necessary? I'm thinking about getting some 9:0:1 JE pistons however after researching on the net, I've noticed some but not all people coat their pistons thru companies like Swain etc.

    Supposedly they reduce "hot spots" but generally what I'm asking is, when will coating pistons be really necessary for a under 20PSI boost?

    Do Subie,dsm oem turbo pistons come coated from factory? or is this just extra extra extra insurance when massive amounts of boost is in the future example 30+

    Me and my friend have a GSR boost project going on his DC2 and we are throwing on a mild Greddy Turbokit for now with a custom sidewinder turbo manifold. The bottom end is going to be built with JE pistons but I just wanted to see how many people actually go thru coating pistons rather than dropping them the way they are. The projects goal is around 350-400HP and not dynoqueen non-daily driver friendly #s.
    Last edited by HyphyAccord; 02-28-2009, 08:08 PM.
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    #2
    nice to have the coating but certainly not required.

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      #3
      I have the bisimoto pistons that were coated. Bisi says 5% increase in power because of better heat control. I like them coated because it helps prevent detonation and it also keeps piston temperature down and maximizing efficiency by not leaching heat away that the turbo will need.

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        #4
        Originally posted by judonoh View Post
        nice to have the coating but certainly not required.
        going to have to agree. i went through calico coatings and got the tops and the skirts coated. tops help with the heat control and skirts act as a dry lubricant and helps with the expansion of forged pistons against cylinder wall if clearences weren't made to suit
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          #5
          I just finished assembling my new short block with Calico coated Wiseco pistons (ceramic tops and teflon skirts) as well as Calico coated bearings. I've heard nothing but good things, we'll see once the engine is running.

          -Kyle
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            #6
            Good Question. Another question to add to OP question: Do these coatings wear? Would there be some type of gain from coating oem pistons and such?

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              #7
              the coating actually bonds into the metal so wear should not be an issue. I am sure that just like anything else there is a life cycle for it. Yes, it will help with stock pistons but it is a luxury item that is not often needed.

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                #8
                Teflon skirts are an awesome idea, if you have the option to get pistons with Teflon coated skirts for not much extra definitely do it.

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