Mick’s Performance

573-634-9990

Percentage of Crankshaft Speed on an 8mm Overdrive Chart

 

Crankshaft Sprocket Tooth Count (side column)        Blower Sprocket Tooth Count (top row)

 

60

59

58

57

56

55

54

53

52

51

50

49

48

47

46

45

44

43

42

54

 

 

 

 

 

 

0.0

1.9

3.8

5.9

8.0

10.2

12.5

14.9

17.4

20.0

22.7

25.6

28.6

55

 

 

 

 

 

0.0

1.9

3.8

5.8

7.8

10.0

12.2

14.6

17.0

19.6

22.2

25.0

27.9

31.0

56

 

 

 

 

0.0

1.8

3.7

5.7

7.7

9.8

12.0

14.3

16.7

19.1

21.7

24.4

27.3

30.2

33.3

57

 

 

 

0.0

1.8

3.6

5.6

7.5

9.6

11.8

14.0

16.3

18.8

21.3

23.9

26.7

29.5

32.6

35.7

58

 

 

0.0

1.8

3.6

5.5

7.4

9.4

11.5

13.7

16.0

18.4

20.8

23.4

26.1

28.9

31.8

34.9

38.1

59

 

0.0

1.7

3.5

5.4

7.3

9.3

11.3

13.5

15.7

18.0

20.4

22.9

25.5

28.3

31.1

34.1

37.2

40.5

60

0.0

1.7

3.4

5.3

7.1

9.1

11.1

13.2

15.4

17.6

20.0

22.4

25.0

27.7

30.4

33.3

36.4

39.5

42.9

61

1.7

3.4

5.2

7.0

8.9

10.9

13.0

15.1

17.3

19.6

22.0

24.5

27.1

29.8

32.6

35.6

38.6

41.9

45.2

62

3.3

5.1

6.9

8.8

10.7

12.7

14.8

17.0

19.2

21.6

24.0

26.5

29.2

31.9

34.8

37.8

40.9

44.2

47.6

63

5.0

6.8

8.6

10.5

12.5

14.5

16.7

18.9

21.2

23.5

26.0

28.6

31.3

34.0

37.0

40.0

43.2

46.5

50.0

64

6.7

8.5

10.3

12.3

14.3

16.4

18.5

20.8

23.1

25.5

28.0

30.6

33.3

36.2

39.1

42.2

45.5

48.8

52.4

65

8.3

10.2

12.1

14.0

16.1

18.2

20.4

22.6

25.0

27.5

30.0

32.7

35.4

38.3

41.3

44.4

47.7

51.2

54.8

66

10.0

11.9

13.8

15.8

17.9

20.0

22.2

24.5

26.9

29.4

32.0

34.7

37.5

40.4

43.5

46.7

50.0

53.5

57.1

67

11.7

13.6

15.5

17.5

19.6

21.8

24.1

26.4

28.8

31.4

34.0

36.7

39.6

42.6

45.7

48.9

52.3

55.8

59.5

68

13.3

15.3

17.2

19.3

21.4

23.6

25.9

28.3

30.8

33.3

36.0

38.8

41.7

44.7

47.8

51.1

54.5

58.1

61.9

69

15.0

17.0

19.0

21.1

23.2

25.5

27.8

30.2

32.7

35.3

38.0

40.8

43.8

46.8

50.0

53.3

56.8

60.5

64.3

70

16.7

18.6

20.7

22.8

25.0

27.3

29.6

32.1

34.6

37.3

40.0

42.9

45.8

48.9

52.2

55.6

59.1

62.8

66.7

71

18.3

20.3

22.4

24.6

26.8

29.1

31.5

34.0

36.5

39.2

42.0

44.9

47.9

51.1

54.3

57.8

61.4

65.1

69.0

72

20.0

22.0

24.1

26.3

28.6

30.9

33.3

35.9

38.5

41.2

44.0

46.9

50.0

53.2

56.5

60.0

63.6

67.4

71.4

73

21.7

23.7

25.9

28.1

30.4

32.7

35.2

37.7

40.4

43.1

46.0

49.0

52.1

55.3

58.7

62.2

65.9

69.8

73.8

74

23.3

25.4

27.6

29.8

32.1

34.5

37.0

39.6

42.3

45.1

48.0

51.0

54.2

57.4

60.9

64.4

68.2

72.1

76.2

75

25.0

27.1

29.3

31.6

33.9

36.4

38.9

41.5

44.2

47.1

50.0

53.1

56.3

59.6

63.0

66.7

70.5

74.4

78.6

76

26.7

28.8

31.0

33.3

35.7

38.2

40.7

43.4

46.2

49.0

52.0

55.1

58.3

61.7

65.2

68.9

72.7

76.7

81.0

77

28.3

30.5

32.8

35.1

37.5

40.0

42.6

45.3

48.1

51.0

54.0

57.1

60.4

63.8

67.4

71.1

75.0

79.1

83.3

78

30.0

32.2

34.5

36.8

39.3

41.8

44.4

47.2

50.0

52.9

56.0

59.2

62.5

66.0

69.6

73.3

77.3

81.4

85.7

79

31.7

33.9

36.2

38.6

41.1

43.6

46.3

49.1

51.9

54.9

58.0

61.2

64.6

68.1

71.7

75.6

79.5

83.7

88.1

80

33.3

35.6

37.9

40.4

42.9

45.5

48.1

50.9

53.8

56.9

60.0

63.3

66.7

70.2

73.9

77.8

81.8

86.0

90.5

81

35.0

37.3

39.7

42.1

44.6

47.3

50.0

52.8

55.8

58.8

62.0

65.3

68.8

72.3

76.1

80.0

84.1

88.4

92.9

82

36.7

39.0

41.4

43.9

46.4

49.1

51.9

54.7

57.7

60.8

64.0

67.3

70.8

74.5

78.3

82.2

86.4

90.7

95.2

83

38.3

40.7

43.1

45.6

48.2

50.9

53.7

56.6

59.6

62.7

66.0

69.4

72.9

76.6

80.4

84.4

88.6

93.0

97.6

84

40.0

42.4

44.8

47.4

50.0

52.7

55.6

58.5

61.5

64.7

68.0

71.4

75.0

78.7

82.6

86.7

90.9

95.3

100.0

85

41.7

44.1

46.6

49.1

51.8

54.5

57.4

60.4

63.5

66.7

70.0

73.5

77.1

80.9

84.8

88.9

93.2

97.7

102.4

86

43.3

45.8

48.3

50.9

53.6

56.4

59.3

62.3

65.4

68.6

72.0

75.5

79.2

83.0

87.0

91.1

95.5

100.0

104.8