TECH WATCH Q
What is blueprinting?
Blueprinting used to be chapter one in the engine tuner’s handbook. It is stripping an engine to its components, then refining them to more closely match the original engine designer’s intent; ie removing the inevitable tolerances and imbalances introduced by variations in manufacturing and production.
Blueprinting consists of three main areas: if pistons, rods, crank, cams and any other reciprocating parts are accurately balanced, less energy is wasted through vibration and bearings get an easier time. Even with a factory assembly check, pistons can vary in weight by a few grammes, rods can be out of true by a similar amount and a crank can be anything up to