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Message: <blockquote data-quote="Powerzone" data-source="post: 353651" data-attributes="member: 9157">ENGINE BLUE-PRINTINGWhat is Engine Blue-printing?The phrase "engine blue-printing" is much misused among today's so-called engine tuners. Or more likely, they honestly cannot differentiate between a normal engine overhaul and a true engine rebuild based on its blue-print.An engine overhaul job done by any workshop usually involves replacing the pistons, piston rings, main and con-rod bearings, and other worn parts besides having the block rebored and crankshaft bearing journals reground.The amount of adherence to specifications and details in rebuilding the engine depends on the mechanic's knowledge, skill and discipline. The reliability and performance of the finished engine are entirely in the mechanic's hands. Hence there is no definite assurance of quality, reliability, and performance.http://www.powerzone.com.my/images/bprint.gifBlue-printing requires strict adherence to specifications from the bare engine block right up to the completed engine unit. A blue-printed engine, on the other hand, is rebuilt by specialists who are well-trained in their field of work. The main difference here is the quality of workmanship and using parts that strictly follow original manufacturer'sspecifications. All critical dimensions, clearances, tolerances, tightening torques, settings, assembly procedures, etc. are on specifications. In this way, the completed engine is given the best conditions to perform at its maximum possible output and reliability.And how does a blue-printed engine compare with a brand new car's engine? The new engine built at the manufacturer's plant is in a way blue-printed since it is produced according to the manufacturer's specifications. However, there is a basic difference in the processes of assembling the engine and the choice of parts used. A factory built engine is put together from off-the-shelf parts that satisfy certain specifications within a range of tolerances.This simply means that the dimensions and finish of the same parts may not be exactly the same but are within acceptable limits. When the whole engine is put together the running clearances and fit quality may turn out to be excellent or may be at the lowest acceptable level due to a mass production condition known as tolerance stack up.If the parts used in building the engine happen to be all of the best dimensions and finish, then the engine will be in top form. On the other hand, if most parts are of the least acceptable dimensions, then the engine will be less than ideal. This accounts for the fact that no two cars of the same model from the same factory perform exactly the same. One will be better than the other. You may have also noticed that the maximum power output stated in your car handbook is never achievable. Now you know why!http://www.powerzone.com.my/images/bprint2.gifLightening and detailing the piston and con-rod help to improve performance and reliability.© Copyright 2005 All Rights Reserved by NS Performance Tuning Sdn Bhd.</blockquote>

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