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copbait73 copbait73 is offline
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Join Date: Nov 2003
Location: Chesterfield IN
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Balance is balance, pretty straight forward however in detail you need to remember and account for every rotating component to include nuts bolts pulleys and their run outs. This involves dynamic balance. Even high precision turbos are often not given a touch up dynamic balance as the individual component balance gives a stack-up in the acceptable range.

Blueprint means different things. Running in a stock class you can select parts for the best combination relating to gas flows spring pressures,etc. but typically machining is a no-no.

Measureable HP is gained from matching each cylinder to the same flow and pressure condition based on what is possible on the best one. Port and manifold flowing, extreme attention to decking for piston crown location toward obtaining equal operating pressures. then throw in equal valving, fuel delivery, spark. In many ways these are these last small gains that one sees moving from mechanical to electronic fueling and spark. This is another blueprinting.

Regarding the Porsche motor I tend to agree with Brian, they have higher minimum standard of acceptance so "weak" motors do not escape production in the first place.

A little story about a well known premium Diesel engine. They sold a 400HP engine, the owner of the company decided with a stroke of marketing wisdom to charge a premium for a calibration of 435HP. Units were sold and shipped and the complaints starting rolling in, seems owners having both the base 400HP and premium pay 435HP felt the same power. Just a little communication with the engineers on the line they would have found most 400HP were already shipping at 425.

Last edited by copbait73; 11-29-2014 at 07:59 PM..
Old 11-29-2014, 07:55 PM
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