Engine Calculations

Useful engine calculations:

Engine displacement:
Type 1:

  Bore
83mm

85.5mm

87mm

88mm

90.5mm

92mm

94mm
Stroke
64mm
 
1385cc
 
1470cc


1522cc


1557cc

1647cc

1702cc

1777cc
69mm 1493cc
1585cc 1641cc 1679cc 1775cc 1835cc 1915cc
74mm 1602cc
1699cc 1760cc 1800cc 1904cc
1968cc
2054cc
78mm 1688cc
1791cc 1855cc 1897cc 2007cc 2074cc
2165cc
82mm 1775cc
1883cc 1950cc 1995cc 2110cc 2180cc 2276cc
84mm 1818cc
1929cc 1997cc 2044cc 2161cc 2234cc 2332cc
86mm 1861cc
1975cc 2045cc 2092cc 2213cc 2287cc 2387cc
88mm 1905cc
2021cc 2093cc 2141cc 2264cc 2340cc 2443cc
90mm 2030cc
2067cc 2140cc 2239cc 2315cc 2393cc 2498cc

 

Type 4:

  Bore
93mm


94mm

96mm
 
104mm
Stroke
66mm

1793cc
 
1911cc
 
71mm
  1971cc
2056cc
2413cc
78mm
  2165cc
2258cc
 
82mm
  2276cc
2374cc
 

 

Deck height displacement calculation:

Deck height displacement = bore X bore X deck height (mm) X 0.0031416

Cylinder displacement calculation:

Cylinder displacement = bore X bore X stroke X 0.0031416 / 4

Compression ratio calculation:

Compression ratio = cylinder displacement + deck height displacement + head cc / deck height displacement + head cc