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  • cng engine compression

    What is the best compression ratio for a cng engine?
    Stan

  • #2
    Re: cng engine compression

    I can't say authoritatively but I hear it's about 12:1-14:1.

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    • #3
      Re: cng engine compression

      Stan,

      Does this help?

      Ben
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      • #4
        Re: cng engine compression

        It depends on: kind of engine, size, company, all kinds of things.
        You can do anything except light a paper match, on a marshmellow, underwater!

        R.I.P. Taylor and Chris

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        • #5
          Re: cng engine compression

          For what it's worth... The 2008 Honda GX engine is made for CNG. This engine has a compression ratio of 12.5:1. 12.5 to 13 is pretty safe, but I don't think there would be much benefit from more. I could be wrong... BTW... most modern engines designed for pump gas (87) are as low as 8.5:1 to 10.5:1 on the high side.
          Last edited by mrpsycho1; 04-29-2008, 02:09 AM.
          03 Chevy Avalanche, 10 GGE tank, ECO negative pressure Regulator and Omnitek Closed Loop System. Range: 130 city / 140 hwy.

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