Ford 390

REQUIRED FIELD: Choose Cyl Bore Size First

• 4.050 in , 102.789 mm (3)
• 4.060 in , 103.043 mm (3)
• 4.080 in , 103.550 mm (3)
• 4.090 in , 103.804 mm (3)
• 4.110 in , 104.312 mm (3)

Show all REQUIRED FIELD: Choose Cyl Bore Size First

Piston Top Aprox. Comp. Ratio

• -5cc Flat Top FE Ford

  Chamber	Comp Ratio
  65	11.18 to 1
  72	10.36 to 1
  76	9.93 to 1

  (1)

• -5cc Flat Top FE Ford

  Chamber	Comp Ratio
  65	11.23 to 1
  72	10.39 to 1
  76	9.97 to 1

  (1)

• -5cc Flat Top FE Ford

  Chamber	Comp Ratio
  65	11.33 to 1
  72	10.48 to 1
  76	10.05 to 1

  (1)

• -5cc Flat Top FE Ford

  Chamber	Comp Ratio
  65	11.36 to 1
  72	10.53 to 1
  76	10.1 to 1

  (1)

• -5cc Flat Top FE Ford

  Chamber	Comp Ratio
  65	11.47 to 1
  72	10.61 to 1
  76	10.19 to 1

  (1)

• -10cc Dish Top FE Ford

  Chamber	Comp Ratio
  65	10.58 to 1
  72	9.83 to 1
  76	9.46 to 1

  (1)

• -10cc Dish Top FE Ford

  Chamber	Comp Ratio
  65	10.63 to 1
  72	9.88 to 1
  76	9.49 to 1

  (1)

• -10cc Dish Top FE Ford

  Chamber	Comp Ratio
  65	10.71 to 1
  72	9.95 to 1
  76	9.58 to 1

  (1)

• -10cc Dish Top FE Ford

  Chamber	Comp Ratio
  65	10.75 to 1
  72	10 to 1
  76	9.62 to 1

  (1)

• -10cc Dish Top FE Ford

  Chamber	Comp Ratio
  65	10.83 to 1
  72	10.09 to 1
  76	9.69 to 1

  (1)

• -16cc Dish Top FE Ford

  Chamber	Comp Ratio
  65	10.05 to 1
  72	9.4 to 1
  76	9.06 to 1

  (1)

• -16cc Dish Top FE Ford

  Chamber	Comp Ratio
  65	10.1 to 1
  72	9.43 to 1
  76	9.1 to 1

  (1)

• -16cc Dish Top FE Ford

  Chamber	Comp Ratio
  65	10.19 to 1
  72	9.52 to 1
  76	9.18 to 1

  (1)

• -16cc Dish Top FE Ford

  Chamber	Comp Ratio
  65	9.93 to 1
  72	9.28 to 1
  76	8.95 to 1

  (1)

• -16cc Dish Top FE Ford

  Chamber	Comp Ratio
  65	9.97 to 1
  72	9.32 to 1
  76	8.99 to 1

  (1)

Show all Piston Top Aprox. Comp. Ratio

Crankshaft Stroke

• 3.784" (15)

Show all Crankshaft Stroke

Piston Pin Diameter

• 0.975" (15)

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Connecting Rod Length

• 6.489" (15)

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Compression Height

• 1.775" (15)

Show all Compression Height

Ring Groove Width

• 1/16-1/16-3/16" (15)

Show all Ring Groove Width