Winter Rebuild

Ratio Charts

Up Common Questions Engine Recommendation Compression Ratio Blower Stages Blower Parts Breakdown Engine Belt Chart Ratio Charts Blower Carb Sizes Parts Break Down

8mm Drive Ratio

Top Pulley

43

44

45

46

47

48

49

50

51

52

53

54

55

56

43

1.0

-2.3

-4.5

-6.5

-8.5

-10.4

-12.2

-14.0

-15.7

-17.3

-18.9

-20.4

-21.8

-23.2

44

-2.3

1.0

-2.3

-4.3

-6.4

-8.3

-10.2

-12.0

-13.7

-15.4

-17.0

-18.5

-20.0

-21.4

45

4.7

2.3

1.0

-2.2

-4.3

-6.2

-8.2

-10.0

-11.8

-13.5

-15.1

-16.7

-18.2

-19.6

46

7.0

4.5

2.2

1.0

-2.1

-4.2

-6.1

-8.0

-9.8

-11.5

-13.2

-16.4

-16.4

-17.9

47

9.3

6.8

4.4

2.2

1.0

-2.1

-4.1

-6.0

-7.2

-9.6

-11.3

-13.0

-14.5

-16.1

B

48

11.6

9.1

6.7

4.3

2.1

1.0

2.0

-4.0

-5.9

-7.7

-9.4

-11.1

-12.7

-14.3

O

49

14.0

11.4

8.9

6.5

4.3

2.1

1.0

-2.0

-3.9

-5.8

-7.5

-9.3

-10.9

-12.5

T

50

16.3

13.6

11.1

8.7

6.4

4.2

2.0

1.0

-2.0

-3.8

-5.7

-7.4

-9.4

-10.7

T

51

18.6

15.9

13.3

10.9

8.5

6.3

4.1

2.0

1.0

-1.9

-3.8

-5.6

-7.3

-8.9

O

52

20.9

18.2

15.6

13.0

10.6

8.3

6.1

4.0

2.0

1.0

-1.9

-3.7

-5.5

-7.1

M

53

23.2

20.5

17.8

15.2

12.8

10.4

8.2

6.0

3.9

1.9

1.0

-1.9

-3.6

-5.4

54

25.5

22.7

20.0

17.4

14.9

12.5

10.2

8.0

5.9

3.8

1.9

1.0

-1.8

-3.6

P

55

27.9

25.0

22.2

19.6

17.0

14.6

12.2

10.0

7.8

5.8

3.8

1.9

1.0

-1.8

U

56

30.2

27.3

24.4

21.7

19.1

16.7

14.3

12.0

9.8

7.7

5.7

3.7

1.8

1.0

L

57

32.5

29.5

26.7

23.9

21.3

18.8

16.3

14.0

11.8

9.6

7.5

5.6

3.6

1.8

L

58

34.8

31.9

28.9

26.1

23.4

20.8

18.4

16.0

13.7

11.5

9.4

7.4

5.5

3.6

E

59

37.2

34.1

31.3

28.3

25.5

22.9

20.4

18.0

15.7

13.5

11.3

9.3

7.3

5.4

Y

60

39.5

36.4

33.3

30.4

27.7

25.0

22.4

20.0

17.6

15.4

13.2

11.1

9.1

7.1

61

41.8

38.6

35.6

32.6

29.8

27.1

24.5

22.0

19.6

17.3

15.1

13.0

10.9

8.9

62

44.2

40.9

37.8

34.8

31.9

29.2

26.5

24.0

21.6

19.2

17.0

14.8

12.7

10.7

63

46.5

43.2

40.0

37.0

34.0

31.1

28.6

26.0

23.5

21.2

18.9

16.7

14.5

12.5

64

48.8

45.5

42.2

39.1

36.2

33.3

30.6

28.0

25.5

23.1

20.8

18.5

16.4

14.3

65

51.2

47.7

44.4

41.3

38.3

35.4

32.7

30.0

27.5

25.0

22.6

20.4

18.2

16.1

66

53.5

50.0

46.7

43.5

40.4

37.5

34.7

32.0

29.4

26.9

24.5

22.2

20.0

17.9

67

55.8

52.3

48.9

45.6

42.6

39.6

36.7

34.0

31.4

28.8

26.4

24.1

21.8

19.6

68

58.1

54.5

51.1

47.8

44.7

41.7

38.8

36.0

33.3

30.8

28.3

25.9

23.6

21.4

69

60.5

56.8

53.3

50.0

46.8

43.8

40.8

38.0

35.3

32.7

30.2

27.8

25.5

23.2

70

62.8

59.1

55.6

52.2

48.9

45.8

42.9

40.0

37.3

34.6

32.1

29.6

27.3

25.0

Top Pulley (8mm Continue)

57

58

59

60

61

62

63

64

65

66

67

68

69

70

43

-24.6

-25.9

-27.1

-28.3

-29.5

-30.6

-31.7

-32.8

-33.8

-34.8

-35.8

-36.8

-37.7

-38.6

44

-22.8

-24.1

-25.4

-26.7

-27.9

-29.0

-30.2

-31.2

-32.3

-33.3

-34.3

-35.3

-36.2

-37.1

45

-21.1

-22.4

-23.7

-25.0

-26.2

-27.4

-28.6

-29.7

-30.8

-31.9

32.8

-33.8

-34.8

-35.7

46

-19.3

-20.7

-22.0

-23.3

-24.6

-25.8

-27.0

-28.1

-29.2

-30.3

-31.3

-32.4

-33.3

-34.3

47

-17.5

-19.0

-20.3

-21.7

-23.0

-24.4

-25.4

-26.6

-27.7

-28.8

-29.9

-30.9

-31.9

-32.9

B

48

-15.8

-17.2

-18.6

-20.0

-21.3

-22.6

-23.8

-25.0

-26.2

-27.3

-28.4

-29.4

-30.4

-31.4

O

49

-14.0

-15.5

-16.9

-18.3

-19.7

-21.0

-22.2

-23.4

-24.6

-25.8

-26.9

-27.9

-29.0

-30.0

T

50

-12.3

-13.8

-15.3

-16.7

-18.0

-19.4

-20.0

-21.9

-23.1

-24.2

-25.4

-26.5

-27.5

-28.6

T

51

-10.5

-12.1

-13.6

-15.0

-16.4

-17.7

-19.0

-20.3

-21.5

-22.7

-23.9

-25.0

-26.1

-27.1

O

52

-8.8

-10.3

-11.9

-13.3

-14.8

-16.1

-17.5

-18.8

-20.0

-21.2

-22.4

-23.5

-24.6

-25.7

M

53

-7.0

-8.6

-10.2

-11.7

-13.1

-14.5

-15.9

-17.2

-18.5

-19.7

-20.9

-22.1

-23.2

-24.3

54

-5.3

-6.9

-8.5

-10.0

-11.5

-12.9

-14.3

-15.6

-16.9

-18.2

-19.4

-20.6

-21.7

-22.9

P

55

-3.5

-5.2

-6.8

-8.3

-9.8

-11.3

-12.7

-14.1

-15.4

-16.7

-17.9

-19.1

-20.3

-21.4

U

56

-1.8

-3.4

-5.1

-6.7

-8.2

-9.7

-11.1

-12.5

-13.8

-15.2

-16.4

-17.6

-18.8

-20.0

L

57

1.0

-1.7

-3.4

-5.0

-6.6

-8.1

-9.5

-10.9

-12.3

-13.6

-14.9

-16.2

-17.4

-18.6

L

58

1.8

1.0

-1.7

-3.3

-4.9

-6.5

-7.9

-9.4

-10.8

-12.1

-13.4

-14.7

-15.9

-17.1

E

59

3.5

1.7

1.0

-1.7

-3.3

-4.8

-6.3

-7.8

-9.2

-10.6

-11.9

-13.2

-14.5

-15.7

Y

60

5.3

3.4

1.7

1.0

-1.6

-3.2

-4.8

-6.3

-7.7

-9.1

-10.4

-11.8

-13.0

-14.3

61

7.0

5.2

3.4

1.7

1.0

-1.6

-3.2

-4.7

-6.2

-7.6

-9.0

-10.3

-11.6

-12.9

62

8.8

6.9

5.1

3.3

1.6

1.0

-1.6

-3.1

-4.6

-6.1

-7.5

-8.8

-10.1

-11.4

53

10.5

8.9

6.8

5.0

3.3

1.6

1.0

-1.6

-3.1

-4.5

-6.0

-7.4

-8.7

-10.0

64

12.3

10.3

8.5

6.7

4.9

3.2

1.6

1.0

-1.5

-3.0

-4.5

-5.9

-7.2

-8.6

65

14.0

12.1

10.2

8.3

6.6

4.8

3.2

1.6

1.0

-1.5

-3.0

-4.4

-5.8

-7.1

66

15.8

13.8

11.9

10.0

8.2

6.5

4.8

3.1

1.5

1.0

-1.5

-2.9

-4.3

-5.7

67

17.5

15.5

13.6

11.7

9.8

8.1

6.3

4.7

3.1

1.5

1.0

-1.5

-2.9

-4.3

68

19.3

17.2

15.3

13.3

11.5

9.7

7.9

6.3

4.6

3.0

1.5

1.0

-1.4

-2.9

69

21.1

19.0

16.9

15.0

13.1

11.3

9.5

7.8

6.2

4.5

3.0

1.5

1.0

-1.4

70

22.8

20.7

18.6

16.7

14.8

12.9

11.1

9.4

7.7

6.1

4.5

2.9

1.4

1.0


1/2" Pitch, 13.9mm & 14mm

Top Pulley

    25 26 27 28 29 30 31 32 33 34 35 36 37
 

25

1.0 -3.8 -7.4 -10.7 -13.8 -16.7 -19.4 -21.9 -24.2 -26.5 -28.6 -30.6 -32.4
 

26

4.0 1.0 -3.7 -7.1 -10.3 -13.3 -16.1 -18.7 -21.2 -23.5 -25.7 -27.8 -29.7
 

27

8.0 3.8 1.0 -3.6 -6.9 -10.0 -12.9 -15.6 -18.2 -20.6 -22.9 -25.0 -27.0
 

28

12.0 7.7 3.7 1.0 -3.4 -6.7 -9.7 -12.5 -15.2 -17.6 -20.0 -22.2 -24.3
 

29

16.0 11.5 7.4 3.6 1.0 -3.3 -6.5 -9.4 -12.1 -14.7 -17.1 -19.4 -21.6
B

30

20.0 15.4 11.1 7.1 3.4 1.0 -3.2 -6.2 -9.1 -11.8 -14.3 -16.7 -18.9
O

31

24.0 19.2 14.8 10.7 6.9 3.3 1.0 -3.1 -6.1 -8.8 -11.4 -13.9 -16.2
T

32

28.0 23.1 18.5 14.3 10.3 6.7 3.2 1.0 -3.0 -5.9 -8.6 -11.1 -13.5
T

33

32.0 26.9 22.2 17.9 13.8 10.0 6.5 3.1 1.0 -2.9 -5.7 -8.3 -10.8
O

34

36.0 30.8 25.9 21.4 17.2 13.3 9.7 6.3 3.0 1.0 -2.9 -5.6 -8.1
M

35

40.0 34.6 29.6 25.0 20.7 16.7 12.9 9.4 6.7 2.9 1.0 -2.8 -5.4
 

36

44.0 38.5 33.3 28.6 24.1 20.0 16.1 12.5 9.1 5.9 2.9 1.0 -2.7
P

37

48.0 42.3 37.0 32.1 27.6 23.3 19.4 15.6 12.1 8.8 5.7 2.8 1.0
U

38

52.0 46.2 40.7 35.7 31.0 26.7 22.6 18.8 15.2 11.8 8.6 5.6 2.7
L

39

56.0 50.0 44.4 39.3 34.5 30.0 25.8 21.9 18.2 14.7 11.4 8.3 5.4
L

40

60.0 53.8 48.1 42.9 37.9 33.3 29.0 25.0 21.2 17.6 14.3 11.1 8.1
E

41

64.0 57.7 51.9 46.4 41.4 36.7 32.3 28.1 24.2 20.6 17.1 13.9 10.8
Y

42

68.0 61.5 55.6 50.0 44.8 40.0 35.5 31.3 27.3 23.5 20.0 16.7 13.5
 

43

72.0 65.4 59.3 53.6 48.3 43.3 38.7 34.4 30.3 26.5 22.9 19.4 16.2
 

44

76.0 69.2 63.0 57.1 51.7 46.7 41.9 37.5 33.3 29.4 25.7 22.2 18.9
 

45

80.0 73.1 66.7 60.7 55.2 50.0 45.2 40.6 36.4 32.4 28.6 25.0 21.6

 

Bottom Border

Toll Free: 800/576-7661
Email: sales@dragparts.com
"Our Ultimate Goal is Your Success"
Good Vibrations has Been Empowering Racers Since 1989

Search | Site Map | Performance Products | Pre-Owned Parts | Technical | Photo Gallery | Special Events | Contact Us

We STOCK the following performance race products: Aeromotive, Billet Connection, The Blower Shop (TBS), Control Cable, Deist Safety, DJ Safety, Enderle Fuel Injection, FAST-EFI, FIE, IMI Hi-Torque, JAZ Products, JESEL, Lucas Oil, Mallory Ignition, Milodon, Prolong, RCD Engineering, RePlay, SCE Gaskets, Smiley Headers, System 1 Filters, Total Seal Rings, Wilwood and XRP Plumbing.  

Building a better world for children

Wish to join the Good Vibrations World Vision team? Click here