14mm Overdrive Chart
Percentage of Crankshaft Speed
Blower Sprocket Tooth Count - ( Also used for 1/2 pitch )
35
34
33
32
31
30
29
28
27
26
25
24
30
-
-
-
-
-
0.0
3.4
7.1
11.1
15.4
20.0
25.0
31
-
-
-
-
0.0
3.3
6.9
10.7
14.8
19.2
24.0
29.2
32
-
-
-
0.0
3.2
6.7
10.3
14.3
18.5
23.1
28.0
33.3
33
-
-
0.0
3.1
6.5
10.0
13.8
17.9
22.2
26.9
32.0
37.5
34
-
0.0
3.0
6.3
9.7
13.3
17.2
21.4
25.9
30.8
36.0
41.7
35
0.0
2.9
6.1
9.4
12.9
16.7
20.7
25.0
29.6
34.6
40.0
45.8
36
2.9
5.9
9.1
12.5
16.1
20.0
24.1
28.6
33.3
38.5
44.0
50.0
37
5.7
8.8
12.1
15.6
19.4
23.3
27.6
32.1
37.0
42.3
48.0
54.2
38
8.6
11.8
15.2
18.8
22.6
26.7
31.0
35.7
40.7
46.2
52.0
58.3
39
11.4
14.7
18.2
21.9
25.8
30.0
34.5
39.3
44.4
50.0
56.0
62.5
40
14.3
17.6
21.2
25.0
29.0
33.3
37.9
42.9
48.1
53.8
60.0
66.7
41
17.1
20.6
24.2
28.1
32.3
36.7
41.4
46.4
51.9
57.7
64.0
70.8
42
20.0
23.5
27.3
31.3
35.5
40.0
44.8
50.0
55.6
61.5
68.0
75.0
43
22.9
26.5
30.3
34.4
38.7
43.3
48.3
53.6
59.3
65.4
72.0
79.2
44
25.7
29.4
33.3
37.5
41.9
46.7
51.7
57.1
63.0
69.2
76.0
83.3
45
28.6
32.4
36.4
40.6
45.2
50.0
55.2
60.7
66.7
73.1
80.0
87.5
46
31.4
35.3
39.4
43.8
48.4
53.3
58.6
64.3
70.4
76.9
84.0
91.7
47
34.3
38.2
42.4
46.9
51.6
56.7
62.1
67.9
74.1
80.8
88.0
95.8
48
37.1
41.2
45.5
50.0
54.8
60.0
65.5
71.4
77.8
84.6
92.0
100.0
49
40.0
44.1
48.5
53.1
58.1
63.3
69.0
75.0
81.5
88.5
96.0
104.2
50
42.9
47.1
51.5
56.3
61.3
66.7
72.4
78.6
85.2
92.3
100.0
108.3
51
45.7
50.0
54.5
59.4
64.5
70.0
75.9
82.1
88.9
96.2
104.0
112.5
52
48.6
52.9
57.6
62.5
67.7
73.3
79.3
85.7
92.6
100.0
108.0
116.7
53
51.4
55.9
60.6
65.6
71.0
76.7
82.8
89.3
96.3
103.8
112.0
120.8
54
54.3
58.8
63.6
68.8
74.2
80.0
86.2
92.9
100.0
107.7
116.0
125.0
55
57.1
61.8
66.7
71.9
77.4
83.3
89.7
96.4
103.7
111.5
120.0
129.2
56
60.0
64.7
69.7
75.0
80.6
86.7
93.1
100.0
107.4
115.4
124.0
133.3
57
62.9
67.6
72.7
78.1
83.9
90.0
96.6
103.6
111.1
119.2
128.0
137.5
58
65.7
70.6
75.8
81.3
87.1
93.3
100.0
107.1
114.8
123.1
132.0
141.7
59
68.6
73.5
78.8
84.4
90.3
96.7
103.4
110.7
118.5
126.9
136.0
145.8
60
71.4
76.5
81.8
87.5
93.5
100.0
106.9
114.3
122.2
130.8
140.0
150.0
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