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2-Cycle Engines

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  • 2-Cycle Engines

    Quick question (although more may follow...)

    When was the last 2 cycle engine entered to race in the Indy 500/Nat'l Championship?

    Thanks to all who reply!

  • #2
    Was the Cummins Diesel in '52 a two-stroke?
    It's a Hoosier thing, you wouldn't understand...

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    • #3
      IIRC the Cummins engines are two stroke diesels. If I'm right then all the Cummins race cars were two strokes.

      The Detroit Diesels are four strokes, as are most diesels.
      "Doc, just set them fingers sose I can hold the wheel"
      James Hurtubise, June, 1964

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      • #4
        You got that backwards. Only the latest Detroits are four strokes. All of the older engines were two strokes and used a blower to pressurize the airbox and the air entered through the crankcase. Of course the fuel was injected. Any Detroit you see with a roots type gear driven blower are two strokes. Some have a turbo on top of the roots blower for more power, but all of the the detroits with a roots type blower are two strokes.

        All of the Cummins Diesels have been four strokes. Detroit went to four strokes because they couldn't make the two strokes meet emissions standards
        A good race driver, given adequate seat time, can drive any well prepared racecar on any track surface or configuration at competitive speeds. Remember, I said a GOOD race driver!!!

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