"Hey, I have a hot rod with a blueprinted engine!"
Many of us have heard somebody say that, then we nod our heads in agreement. And some of even have a slight idea of what that means. So to help explain this, we turn to EngineBasics.com, who at least partially define Engine Blueprinting as:
"A true blueprinted motor though, is one were every single part has been measured and matched exactly to a tolerance that FAR EXCEDES the manufacturers original tolerances. On a blueprinted motor one could say there “are no tolerances”, since everything is matched at times to a hundred thousands of an inch. The amount of balancing a blueprinted motor needs is so low its off the scale. All bearing and races are measured to be with-in thousands of each-other."
They can say that a lot better than I can.
Therefore, basically, a blueprinted engine is one built to incredibly tight tolerances, mainly to avoid power-robbing vibration issues.
So there. And of course, this is also the place to discuss anything else even ever so slightly automotive related. With or without blueprints.
--That Car Guy (Chuck)
Image Credit: Our blueprinted engine example came from EddiesPerformance.com.