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Old 09-19-2012, 09:55 AM   #1
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Came across this term when looking at rebuilt engines in the classifieds. Not really satisfied with the results I got from a google search. What does this term mean?

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Old 09-19-2012, 09:55 AM   #2
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Came across this term when looking at rebuilt engines in the classifieds. Not really satisfied with the results I got from a google search. What does this term mean?
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Old 09-19-2012, 10:34 AM   #3
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From what I remember, blueprinting generally is a term used when building a motor with all the clearances and I guess some other things on the "sweet side" in terms of performance. I think cc-ing the heads falls under this heading too. Balancing refers to making all the rotating parts the exact same weight (pistons, pins, rods, etc.) and balancing the crank better than the factory did it. A stock motor winds up with more power, more torque, and smoother running.
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Old 09-19-2012, 11:19 AM   #4
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I concur with Dave. Back in the day (60's) it was common to hear someone say an engine was balanced and blueprinted, meaning the various engine components had been assembled to the optimum factory specifications and the rotating assembly was balanced. Also I hear the term "rods" stated alot. The term "rods" meant connecting rods, never push rods. There were also terms such as "3/4 race" or "full race" cam shafts. The actual spec's not so much mentioned. 3/4 being a hot street cam and full race being just streetable. Milled heads were also common along with pop-up pistons. Terms have changed. Early on there weren't so many aftermarket pieces so a lot of hot rods relied on engine swaps. Cadillac and Olds being the same engine often stuffed into cheaper older cars/trucks. I remember Buicks being a favorite in mid fifty ford trucks. But basically whatever the good deal was at the local boneyard. Great fun back in the day.
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Old 09-19-2012, 12:58 PM   #5
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A buddy of mine with a Porsche 914 had his motor blueprinted and balanced. He was still within the rule book of the SCCA for his stock class, but the car ran a whole lot stronger than it did before.
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Old 09-19-2012, 05:32 PM   #6
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Thanks guys. I had a good idea about the "balancing" part, but was more unsure what the "blueprinting" aspect entailed.
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