Hudson 8 compression value

DonaldDonald Posts: 49Member
What would the compression PSI value have been on a 1949 Hudson 8 had been when new?   My used engine averages 75 PSI.  thanks,  Don


  • GeoffGeoff Posts: 4,606Senior Contributor
    Probably around 100 p.s.i., but remember there are differing factors to take into account.   Valve seating, tappet clearance,  piston ring sealing, oil thickness, engine temperature, cranking speed etc.  If your compressions are all equal, and the  engine is not burning oil, you don't have anything to worry about.   
    If you're stuck in a hole, stop digging.
  • BigSkyBigSky Posts: 1,019Senior Contributor
    My 37 Hudson 6 cylinder had around 75psi.   After new valves, guides & piston rings it was around 115psi after around 350 break in miles.
  • DonaldDonald Posts: 49Member
    Thank you for your information.  It gives me a base to judge my used engine.
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