|
Formula
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Example
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|
Deck
Height (mm) =
|
Deck
Height (inches) x 25.4 mm/inch
|
|
| .080 inches x 25.4 mm/inch |
= 2.03 mm |
|
|
|
Total
Engine Displacement (cc) =
|
Bore
x Bore x
Stroke
(mm) x .0031416
|
|
|
92 mm x 92 mm x 69 mm x .0031416
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= 1834.74 cc
|
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Deck
Height
Displacement
=
(cc)
|
Bore
x Bore x Deck Height (mm) x .0031416
|
|
|
4
|
|
|
92 mm x 92 mm x 2.03 mm x
.0031416
|
= 13.49 cc
|
|
|
4
|
|
|
Cylinder
Displacement
=
(cc)
|
Bore
x Bore x Stroke in mm x .0031416
|
|
|
4
|
|
|
92
x 92 mm x 69 mm x .0031416
|
= 458.7 cc
|
|
|
4
|
|
|
Head
Displacement
=
(cc)
|
Cylinder
Displacement +
Deck
Height Displacement -
("Desired
Compression Ratio"
x
Deck Height Displacement)
|
|
|
("Desired
Compression Ratio" -1)
|
|
|
458.7
cc + 13.49 cc - (9.6 x 13.49 cc)
|
= 39.85 cc
|
|
|
(9.6
-1)
|
|
|
Compression
Ratio
=
|
Cylinder
Displacement + Deck Height Displacement + Head CC's
|
|
|
Deck
Height Displacement + Head CC's
|
|
|
458.7
cc + 13.49 cc + 39.85 cc
|
= 9.6 to 1
|
|
|
13.49
cc + 39.85 cc
|
|
