Explore practical articles about bore, stroke, displacement conversions, and the tradeoffs that shape real engine combinations.
Showing 1-12 of 30 articles
Engine Theory
Master the swept-volume formula from first principles. Step-by-step worked examples in metric and imperial, interactive diagrams, unit-conversion tables, and the 3 mistakes that produce wrong answers.
Engine Geometry
Understand the 3 bore-to-stroke geometries, why they produce different power characteristics, and how to identify which category your engine falls into using real-world examples.
Engine Machining
Learn exactly how much displacement each overbore amount adds, why bore is squared in the formula, where the safety limits are, and when a stroker kit is the better path.
Conversions
Discover why a "5.0L" engine is actually 4,951 cc, how manufacturing constraints, bore spacing, and emissions targets make clean liter numbers nearly impossible, and what the real displacement tells you that the badge does not.
Engine Theory
Understand why pi appears in every displacement formula, how it converts bore diameter into cylinder area, what happens when you leave it out, and how this single constant connects engine math to fundamental geometry.
Engine Theory
Understand the difference between gross and net horsepower testing methods, why 1971 changed everything, how to convert between the two standards, and what displacement really contributes to measured output.
Engine Theory
Understand how rotary engine displacement is measured, why a 1.3L rotary performs like a 2.6L piston engine, and how racing sanctioning bodies calculate equivalency factors for competition classification.
Engine Machining
Learn the step-by-step process for measuring cylinder bore diameter using a dial bore gauge, how to detect taper and out-of-round, where to take measurements, and how measurement accuracy affects displacement and clearance calculations.
Engine Machining
Learn how to accurately measure crankshaft stroke using a dial indicator, why TDC and BDC must be found precisely, and how stroke measurement errors cascade through displacement, piston speed, and rod ratio calculations.
Engine Machining
Learn how flat-top, dished, and domed pistons affect clearance volume, compression ratio, and combustion behavior. Includes volume reference tables, measurement methods, and a decision framework for choosing the right piston shape.
Engine Machining
Learn how combustion chamber volume sets compression ratio, exactly how much material head milling removes, the cc-per-thousandth relationship for popular engine families, and when milling is the right path versus piston or gasket changes.
Engine Machining
Learn how sonic testing maps cylinder wall thickness before an overbore, how the process works, what the numbers mean, how to read a sonic report, and when the test is mandatory versus optional.
