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  1. #11
    Super Moderator bmorgil's Avatar
    Join Date
    Dec 2018
    Northwestern Ohio
    TJones, I had to add to our leak down conversation. At the National Tractor Pulls yesterday, I was speaking with a a good friend of mine that I used to work with. An outstanding engineer and 12 time National Tractor pulling Champion. He had just finished pulling the day before. We started talking ring seal on a motor that just took a first.

    With nearly a 5 inch bore and gaped rings, on a fresh valve job, he was getting under 5%! I cannot tell you much about the work that went into the cylinder, ring and honing (secret stuff ya know). Needless to say it is significant, However that is a huge bore to get that result with gaped rings. The thing that was significant in our conversation was the motor was getting better as it pulled hard. After several runs it was approaching numbers less than 4%.
    Last edited by bmorgil; 08-18-2019 at 10:53 AM.

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