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COMPRESSION RATIO

COMPRESSION RATIO. Combustion chamber volume Head gasket volume Deck Height Cylinder volume. Terms. Radius = diameter /2 Squared = number multiplied by itself Pi = 3.1416 Stroke = Piston movement TDC to BDC. COMBUSTION CHAMBER. Measure combustion chamber in cc’s. HEAD GASKET.

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COMPRESSION RATIO

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  1. COMPRESSION RATIO • Combustion chamber volume • Head gasket volume • Deck Height • Cylinder volume

  2. Terms • Radius = diameter /2 • Squared = number multiplied by itself • Pi = 3.1416 • Stroke = Piston movement TDC to BDC

  3. COMBUSTION CHAMBER • Measure combustion chamber in cc’s

  4. HEAD GASKET • Figure head gasket volume • Use formula Pi x radius2 x height • Convert to cc’s, ci x 16.3866 = cc

  5. DECK HEIGHT • Bring piston to TDC • Measure from deck to piston • Figure area Pi x r2 x height

  6. CYLINDER VOLUME • Bore divided by 2 • Pi r2 x stroke

  7. CLEARANCE VOLUME AT TDC • Combustion chamber volume in cc’s • Head gasket volume in cc’s • Deck height volume in cc’s ______ • Total

  8. CLEARANCE VOLUME AT BDC • Combustion chamber volume in cc’s • Head gasket volume in cc’s • Deck height volume in cc’s • Cylinder volume in cc’s ______ • Total

  9. COMPRESSION RATIO • Clearance volume at TDC ________________________ = CR • Clearance volume at BDC

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