Blueprinting BMW Engines
Blueprinting BMW Engines or any other Engine Blueprinting is the art of defining tolerances to an acceptable minimum and in other words most production or newly manufactured engines are but almost blueprinted. This means that the designs of any engine patterns and drawings, ultimately land up in the tooling specialists department. This is a far from perfect scenario in the engineering assembly process. Not every component at the end of the assembly line meets the intended blueprint specifications of the designers due to many accumulative and acceptable problems to a lesser degree and most is attributed by the fact that in the engine manufacturers production line and the machine tools that cut the metal components become dull and untrue.
The internal combustion engine is a hostile and complicated piece of machinery to most of us and when one adds up all the inaccuracies you arrive at with different figures, sometimes without realizing, and often the mistakes can balance one another out. When the engineer arrives at the completed part or assembly, sometimes the original figures can be arrived at as the original blueprints. This however this is guesswork in the making and more often all these combinations arrive to produce components in the production line that are often less ideal than one would expect from a competent vehicle manufacturer.
It is commonly quoted, “A production assembly line is no place for a perfectionist engineer”. So the vehicle manufacturers and their engineers are willing to accept engine components that are almost right and somewhat close enough to last long enough to warrant a reasonable guarantee for the money. In the assembly margins of error there still must lie a reliable means of determining whether the parts are a close enough to coincide with one another in the harsh conditions of an internal combustion engine. This is what an accepted tolerance figure is for when blueprinting engines.
Blueprinting is a proven scientific formula of eradicating incorrect dimensions and instituting critical dimensional figures based on all the above mentioned acceptable minimal clearances assigned to tolerance. Some tolerances are more critical than others and this is what blueprinting is about. It’s possible for the individual machine operations to be within tolerance, yet the final part may be out of specification. In many instances acceptable tolerances cover such a wide range that it’s a mind game as to how and why any production engine is able to live a long and a productive life. If an engine is assembled in an sub orderly fashion with acceptable assembly parts it becomes evident that engines have amazing tolerances for abuse.
Blueprinting therefore is simply making certain that all of the factory tolerances fall within factory specifications and realize that blueprinting an engine means not only checking clearances but correcting them as well as you start the process of elimination. The term ‘blueprinting’ embraces a tremendous range of engine knowledge and the skills required to successfully build a blueprint motor. Even the most professional engine builder will continually discover ways to improve and find new tricks and techniques that will evolve in his ever growing scientific experimentation and make his motors more reliable and powerfull.
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