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  • Flatiron
    started a topic Yamato engine Temp

    Yamato engine Temp

    What is considered the optimum Cylinder head temp for a Yamato 302 on a CSH ?

  • Flatiron
    commented on 's reply
    Thank you for the numbers Both my CSR and CSH are pumping water pretty decent, I'm rather inexperienced at reading plugs they seem a touch on the rich side. I just got a Temp gauge so I was curious about actual numbers. Thanks Again

  • JohnsOldMercurySite
    replied
    good timing, would this be similar temps for the Y102? maiden run tomorrow

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  • dholt
    replied
    keep it under 400 degrees...380-390 no problems.

    at 3/4" height rule pumping water shouldn't be an issue anyway. But ream out the hole if you're on the edge of pumping water.

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  • HydroKyle93R
    replied
    I think Guedo499 has some data on this. John?

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