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  COMPRESSION RATIO CHARTS



 

Product Code: COMPRESSION RATIO CHARTS
Qty:

Description Compression Ratio Chart
 


4.6 / 5.0 Stroker / 5.3 Stroker Big Bore / 5.4 MODULAR FORD COMPRESSION CHART
Common Ford Modular cylinder head combustion chamber sizes
Caution:This is only a guide. You should always confirm your actual combustion chamber volume.
2 valve PI 44 cc ( OEM 1999 and newer)
2 valve NPI 51 cc (OEM 1992 to 1998 )
2 valve PI D.S.S. match port 44 cc (1999 and newer)
2 valve PI D.S.S. Full CNC Port 50cc (1999 and newer)
3 valve Ford Racing CNC ported 50 cc
4 valve Ford Racing CNC ported 52 cc

Combustion chamber Volume (in CC's) 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58
4.6

Dish -3cc (2V)

12.49

12.26

12.05

11.84

11.64

11.44

11.26

11.08

10.90

10.74

10.58

10.42

10.27

10.12

9.98

9.84

9.71

Dish -4cc (4V)

12.26

12.05

11.84

11.64

11.44

11.26

11.08

10.90

10.74

10.58

10.42

10.27

10.12

9.98

9.84

9.71

9.58

Dish -5cc (3V)

12.05

11.84

11.64

11.44

11.26

11.08

10.90

10.74

10.58

10.42

10.27

10.12

9.98

9.84

9.71

9.58

9.45

Dish -10cc

11.08

10.90

10.74

10.58

10.42

10.27

10.12

9.98

9.84

9.71

9.58

9.45

9.33

9.21

9.09

8.98

8.87

Dish -12cc (4V)

10.74

10.58

10.42

10.27

10.12

9.98

9.84

9.71

9.58

9.45

9.33

9.21

9.09

8.98

8.87

8.77

8.66

Dish -13cc (3V)

10.58

10.42

10.27

10.12

9.98

9.84

9.71

9.58

9.45

9.33

9.21

9.09

8.98

8.87

8.77

8.66

8.56

Dish -18cc

9.84

9.71

9.58

9.45

9.33

9.21

9.09

8.98

8.87

8.77

8.66

8.56

8.46

8.37

8.27

8.18

8.10

Dish -21cc

9.45

9.33

9.21

9.09

8.98

8.87

8.77

8.66

8.56

8.46

8.37

8.27

8.18

8.10

8.01

7.92

7.84

Dish -22cc (3V)

9.33

9.21

9.09

8.98

8.87

8.77

8.66

8.56

8.46

8.37

8.27

8.18

8.10

8.01

7.92

7.84

7.76

5.0

Dish -6cc (2V)

12.47

12.26

12.05

11.86

11.67

11.48

11.31

11.13

10.97

10.81

10.65

10.50

10.36

10.21

10.08

9.94

9.81

Dish-7cc (4V)

12.26

12.05

11.86

11.67

11.48

11.31

11.13

10.97

10.81

10.65

10.50

10.36

10.21

10.08

9.94

9.81

9.69

Dish -8cc (3V)

12.05

11.86

11.67

11.48

11.31

11.13

10.97

10.81

10.65

10.50

10.36

10.21

10.08

9.94

9.81

9.69

9.57

Dish -13cc

11.13

10.97

10.81

10.65

10.50

10.36

10.21

10.08

9.94

9.81

9.69

9.57

9.45

9.33

9.22

9.11

9.00

Dish -15cc (4V)

10.81

10.65

10.50

10.36

10.21

10.08

9.94

9.81

9.69

9.57

9.45

9.33

9.22

9.11

9.00

8.90

8.80

Dish -16cc (3V)

10.65

10.50

10.36

10.21

10.08

9.94

9.81

9.69

9.57

9.45

9.33

9.22

9.11

9.00

8.90

8.80

8.70

Dish -21cc

9.94

9.81

9.69

9.57

9.45

9.33

9.22

9.11

9.00

8.90

8.80

8.70

8.60

8.51

8.42

8.33

8.24

Dish -24cc (4V)

9.57

9.45

9.33

9.22

9.11

9.00

8.90

8.80

8.70

8.60

8.51

8.42

8.33

8.24

8.16

8.07

7.99

Dish -25cc (3V)

9.45

9.33

9.22

9.11

9.00

8.90

8.80

8.70

8.60

8.51

8.42

8.33

8.24

8.16

8.07

7.99

7.91

5.3

Dish -6cc (2V)

13.40

13.17

12.95

12.74

12.53

12.34

12.15

11.96

11.78

11.61

11.44

11.28

11.12

10.97

10.82

10.68

10.54

Dish-7cc (4V)

13.17

12.95

12.74

12.53

12.34

12.15

11.96

11.78

11.61

11.44

11.28

11.12

10.97

10.82

10.68

10.54

10.40

Dish -8cc (3V)

12.95

12.74

12.53

12.34

12.15

11.96

11.78

11.61

11.44

11.28

11.12

10.97

10.82

10.68

10.54

10.40

10.27

Dish -13cc

11.96

11.78

11.61

11.44

11.28

11.12

10.97

10.82

10.68

10.54

10.40

10.27

10.14

10.02

9.90

9.78

9.66

Dish -15cc (4V)

11.61

11.44

11.28

11.12

10.97

10.82

10.68

10.54

10.40

10.27

10.14

10.02

9.90

9.78

9.66

9.55

9.44

Dish -16cc (3V)

11.44

11.28

11.12

10.97

10.82

10.68

10.54

10.40

10.27

10.14

10.02

9.90

9.78

9.66

9.55

9.44

9.33

Dish -21cc

10.68

10.54

10.40

10.27

10.14

10.02

9.90

9.78

9.66

9.55

9.44

9.33

9.23

9.13

9.03

8.93

8.84

Dish -24cc (4V)

10.27

10.14

10.02

9.90

9.78

9.66

9.55

9.44

9.33

9.23

9.13

9.03

8.93

8.84

8.75

8.66

8.57

Dish -25cc (3V)

10.14

10.02

9.90

9.78

9.66

9.55

9.44

9.33

9.23

9.13

9.03

8.93

8.84

8.75

8.66

8.57

8.48

5.4

Dish -3cc (2V)

10.74

10.61

10.47

10.34

10.21

10.09

9.97

9.85

9.74

9.63

9.52

9.41

9.31

9.21

9.11

9.01

8.92

Dish-4cc (4V)

10.61

10.47

10.34

10.21

10.09

9.97

9.85

9.74

9.63

9.52

9.41

9.31

9.21

9.11

9.01

8.92

8.83

Dish -5cc (3V)

10.47

10.34

10.21

10.09

9.97

9.85

9.74

9.63

9.52

9.41

9.31

9.21

9.11

9.01

8.92

8.83

8.74

Dish -10cc

9.85

9.74

9.63

9.52

9.41

9.31

9.21

9.11

9.01

8.92

8.83

8.74

8.65

8.56

8.48

8.40

8.32

Dish -12cc (4V)

9.63

9.52

9.41

9.31

9.21

9.11

9.01

8.92

8.83

8.74

8.65

8.56

8.48

8.40

8.32

8.24

8.16

Dish -13cc (4V)

9.52

9.41

9.31

9.21

9.11

9.01

8.92

8.83

8.74

8.65

8.56

8.48

8.40

8.32

8.24

8.16

8.09

Dish -18cc

9.01

8.92

8.83

8.74

8.65

8.56

8.48

8.40

8.32

8.24

8.16

8.09

8.02

7.94

7.87

7.80

7.74

Dish -21cc (4V)

8.74

8.65

8.56

8.48

8.40

8.32

8.24

8.16

8.09

8.02

7.94

7.87

7.80

7.74

7.67

7.60

7.54

Dish -22cc (3V)

8.65

8.56

8.48

8.40

8.32

8.24

8.16

8.09

8.02

7.94

7.87

7.80

7.74

7.67

7.60

7.54

7.48


 



Common Ford aftermarket cylinder head combustion chamber sizes:
Caution:This is only a guide. You should always confirm your actual combustion chamber volume
.
AFR 58cc / 61 cc / 72 cc
Dart  58cc / 64 cc
Edelbrock 60 cc / 70cc
Ford Racing 58 cc, 64 cc
Trick Flow Twisted Wedge, Track heat and R series 61cc - 64 or 65cc when factory CNC ported

Trick Flow 190 Fast as Cast - 64cc
Trick Flow High Ports  64 cc
World Products 58 cc /64 cc

Chamber Volume (in CC's)

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

306

Flat Top -3cc

11.51

11.34

11.17

11.01

10.85

10.70

10.55

10.41

10.27

10.13

10.00

9.88

9.75

9.63

9.51

9.40

9.29

9.18

9.08

8.97

8.87

8.78

8.68

Dish -13cc

10.00

9.88

9.75

9.63

9.51

9.40

9.29

9.18

9.08

8.97

8.87

8.78

8.68

8.59

8.50

8.41

8.32

8.24

8.15

8.07

7.99

7.92

7.84

Dome +6cc

13.38

13.14

12.91

12.69

12.47

12.27

12.07

11.88

11.69

11.51

11.34

11.17

11.01

10.85

10.70

10.55

10.41

10.27

10.13

10.00

9.88

9.75

9.63

331

Flat Top -3cc

12.39

12.20

12.02

11.84

11.67

11.51

11.35

11.19

11.04

10.90

10.75

10.62

10.48

10.35

10.22

10.10

9.98

9.86

9.75

9.64

9.53

9.42

9.32

Dish -13cc

10.75

10.62

40.48

10.35

10.22

10.10

9.98

9.86

9.75

9.64

9.53

9.42

9.32

9.22

9.12

9.03

8.93

8.84

8.75

8.66

8.58

8.49

8.41

Dish -18cc

10.10

9.98

9.86

9.75

9.64

9.53

9.42

9.32

9.22

9.12

9.03

8.93

8.84

8.75

8.66

8.58

8.49

8.41

8.33

8.25

8.17

8.10

8.03

Dome +6cc

14.41

14.15

13.90

13.66

13.43

13.21

12.99

12.78

12.58

12.37

12.20

12.02

11.84

11.67

11.51

11.35

11.19

11.04

10.90

10.75

10.62

10.48

10.35

347

Flat Top -3cc

12.91

12.72

12.53

12.34

12.17

11.99

11.83

11.66

11.51

11.35

11.20

11.06

10.92

10.78

10.65

10.52

10.39

10.27

10.15

10.04

9.92

9.81

9.70

Dish -18cc

10.52

10.39

10.27

10.15

10.04

9.92

9.81

9.70

9.60

9.50

9.40

9.30

9.20

9.11

9.02

8.93

8.84

8.75

8.67

8.59

8.51

8.43

8.35

Dome +6cc

15.03

14.76

14.50

14.25

14.00

13.77

13.55

13.33

13.12

12.91

12.72

12.53

12.34

12.17

11.99

11.83

11.66

11.51

11.35

11.20

11.06

10.92

10.78

357

Flat Top -3cc

13.26

13.06

12.87

12.68

12.49

12.32

12.14

11.98

11.81

11.66

11.50

11.36

11.21

11.07

10.93

10.80

10.67

10.54

10.42

10.30

10.19

10.07

9.96

Dish -18cc

10.80

10.67

10.54

10.42

10.30

10.19

10.07

9.96

9.85

9.75

9.64

9.54

9.44

9.35

9.25

9.16

9.07

8.98

8.90

8.81

8.73

8.65

8.57

363

Flat Top -3cc

13.43

13.23

13.03

12.84

12.66

12.48

12.30

12.13

11.97

11.81

11.65

11.50

11.36

11.22

11.08

10.94

10.81

10.68

10.56

10.44

10.32

10.21

10.09

Dish -22cc

10.44

10.32

10.21

10.09

9.98

9.88

9.77

9.67

9.57

9.47

9.38

9.28

9.19

9.10

9.02

8.93

8.85

8.77

8.69

8.61

8.53

8.45

8.38

393

Flat Top -3cc

14.49

14.27

14.05

13.85

13.64

13.45

13.26

13.07

12.90

12.72

12.55

12.39

12.23

12.08

11.93

11.78

11.64

11.50

11.36

11.23

11.10

10.98

10.86

Dish -13cc

12.55

12.39

12.23

12.08

11.93

11.78

11.64

11.36

11.13

11.23

11.10

10.98

10.86

10.74

10.62

10.51

10.40

10.29

10.18

10.08

9.98

9.88

9.78

Dish -31cc

10.18

10.08

9.98

9.88

9.78

9.69

9.59

9.50

9.41

9.33

9.24

9.16

9.08

9.00

8.92

8.84

8.76

8.69

8.62

8.55

8.48

8.41

8.34

408

Flat Top -3cc

15.02

14.79

14.56

14.35

14.14

13.93

13.74

13.54

13.36

13.18

13.00

12.83

12.67

12.51

12.35

12.20

12.05

11.91

11.77

11.63

11.50

11.37

11.24

Dish -18cc

12.20

12.05

11.91

11.77

11.63

11.50

11.37

11.25

11.12

11.00

10.88

10.76

10.65

10.54

10.43

10.33

10.22

10.12

10.02

9.93

9.83

9.74

9.65

Dish -31cc

10.54

10.43

10.33

10.22

10.12

10.02

9.93

9.83

9.74

9.65

9.56

9.48

9.39

9.31

9.23

9.15

9.07

8.99

8.91

8.84

8.77

8.70

8.63

427

Flat Top -3cc

15.61

15.37

15.14

14.91

14.69

14.48

14.28

14.08

13.88

13.70

13.51

13.34

13.17

13.00

12.84

12.68

12.52

12.37

12.23

12.08

11.94

11.81

11.68

Dish -22cc

12.10

11.97

11.83

11.70

11.57

11.44

11.32

11.20

11.08

10.97

10.86

10.75

10.64

10.53

10.43

10.33

10.23

10.14

10.04

9.95

9.86

9.77

9.68

Dish -31cc

10.97

10.86

10.75

10.64

10.53

10.43

10.33

10.23

10.14

10.04

9.95

9.86

9.77

9.68

9.60

9.51

9.43

9.35

9.27

9.20

9.12

9.05

8.97

SBF engine compression figured with 4.030 cylinder bore, 4.100" gasket bore, .040" gasket thickness, zero deck;
363 and 427 with 4.125" cylinder, 4.155" gasket
 
 

Chamber Volume (in CC's)

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

350

Flat Top -5cc

11.75

11.60

11.44

11.30

11.15

11.01

10.88

10.74

10.62

10.49

10.37

10.25

10.13

10.02

9.91

9.80

9.70

9.59

9.49

9.39

9.30

9.21

9.11

Dish -21cc

9.70

9.59

9.49

9.39

9.30

9.21

9.11

9.02

8.94

8.85

8.77

8.69

8.61

8.53

8.45

8.37

8.30

8.23

8.16

8.09

8.02

7.95

7.89

Dome +4cc

13.40

13.19

12.99

12.80

12.61

12.43

12.25

12.08

11.91

11.75

11.60

11.44

11.30

11.15

11.01

10.88

10.74

10.62

10.49

10.37

10.25

10.13

10.02

377

Flat Top -5cc

12.27

12.10

11.94

11.79

11.64

11.49

11.35

11.21

11.07

10.94

10.81

10.69

10.57

10.45

10.33

10.22

10.11

10.00

9.90

9.80

9.70

9.60

9.50

Dish -16cc

10.69

10.57

10.45

10.33

10.22

10.11

10.00

9.90

9.80

9.70

9.60

9.50

9.41

9.32

9.23

9.14

9.05

8.97

8.89

8.80

8.73

8.65

8.57

Dish -21cc

10.11

10.00

9.90

9.80

9.70

9.60

9.50

9.41

9.32

9.23

9.14

9.05

8.97

8.89

8.80

8.73

8.65

8.57

8.50

8.42

8.35

8.28

8.21

Dish -28cc

9.41

9.32

9.23

9.14

9.05

8.97

8.89

8.80

8.73

8.65

8.57

8.50

8.42

8.35

8.28

8.21

8.15

8.08

8.01

7.95

7.89

7.83

7.77

383

Flat Top -5cc

12.59

12.42

12.25

12.09

11.94

11.79

11.64

11.50

11.36

11.23

11.09

10.97

10.84

10.72

10.60

10.48

10.37

10.26

10.15

10.05

9.94

9.84

9.74

Dish -16cc

10.97

10.84

10.72

10.60

10.48

10.37

10.26

10.15

10.05

9.94

9.84

9.74

9.65

9.55

9.46

9.37

9.28

9.20

9.11

9.03

8.95

8.87

8.79

Dish -21cc

10.37

10.26

10.15

10.05

9.94

9.84

9.74

9.65

9.55

9.46

9.37

9.28

9.20

9.11

9.03

8.95

8.87

8.79

8.71

8.64

8.56

8.49

8.42

Dish -28cc

9.65

9.55

9.46

9.37

9.28

9.20

9.11

9.03

8.95

8.87

8.79

8.71

8.64

8.56

8.49

8.42

8.35

8.28

8.21

8.15

8.08

8.02

7.96

Dome +4cc

14.36

14.14

13.92

13.71

13.51

13.32

13.12

12.94

12.76

12.59

12.42

12.25

12.09

11.94

11.79

11.64

11.50

11.36

11.23

11.09

10.97

10.84

10.72

400

Flat Top -5cc

13.14

12.96

12.79

12.62

12.46

12.30

12.15

12.00

11.86

11.71

11.58

11.44

11.31

11.18

11.06

10.94

10.82

10.70

10.59

10.48

10.37

10.26

10.16

Dish -16cc

11.44

11.31

11.18

11.06

10.94

10.82

10.70

10.59

10.48

10.37

10.26

10.16

10.06

9.96

9.86

9.77

9.68

9.59

9.50

9.41

9.32

9.24

9.16

Dish -21cc

10.82

10.70

10.59

10.48

10.37

10.26

10.16

10.06

9.96

9.86

9.77

9.68

9.59

9.50

9.41

9.32

9.24

9.16

9.08

9.00

8.92

8.85

8.77

Dish -28cc

10.06

9.96

9.86

9.77

9.68

9.59

9.50

9.41

9.32

9.24

9.16

9.08

9.00

8.92

8.85

8.77

8.70

8.63

8.56

8.49

8.42

8.36

8.29

SBC engine compression figured with 4.030" cylinder bore, 4.100" gasket bore, .040" gasket thickness, zero deck,
377 and 400 with
4.125" cylinder, 4.155" gasket