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Ford Motor Co. Vacuum Advance & Retard Specifications
NOTE:
FOR ENGINE RPM AND DEGREES. MULTIPLY SPECIFICATIONS BELOW BY 2
| Distributor Part No. |
Vacuum Advance (Distr. Degrees) |
Vacuum Retard (Distr. Degrees) |
| Deg. |
In. Hg. |
Deg. |
In. Hg. |
Deg. |
In. Hg. |
Deg. |
In. Hg. |
Deg. |
In. Hg. |
Deg. |
In. Hg. |
Deg. |
In. Hg. |
Deg. |
In. Hg. |
Deg. |
In. Hg. |
| C8AF-B |
0-1 |
5 |
3-6 |
10 |
6 1/2-8 |
15 |
6 1/2-9 |
20 |
6 1/2-9 |
25 |
0-2 1/4 |
5 |
4-6 |
10 |
5-7 |
15 |
5-7 |
20 |
| C8VF-C |
0-3/4 |
5 |
1/2-4 |
10 |
6-9 |
15 |
8 1/2-11 1/2 |
20 |
9 1/2-12 |
25 |
0-1/2 |
5 |
1-5 1/4 |
10 |
5-7 |
15 |
5-7 |
20 |
| C9DF-B |
0-3/4 |
5 |
1 1/4-4 3/4 |
10 |
5 1/2-8 |
15 |
5 1/2-8 |
20 |
5 1/2-8 |
25 |
0-2 |
5 |
3/4-6 |
10 |
5-7 |
15 |
5-7 |
20 |
| DOAF-AE |
0-1 1/2 |
5 |
0-2 1/2 |
10 |
0-2 1/2 |
15 |
0-2 1/2 |
20 |
0-2 1/2 |
25 |
0-1 |
5 |
2 1/2-7 |
10 |
5-7 |
15 |
5-7 |
20 |
| DOAF-Y |
0-3/4 |
5 |
0-2 1/4 |
10 |
3 3/4-6 3/4 |
15 |
7 1/4-10 1/4 |
20 |
8 1/2-11 |
25 |
0-1/2 |
5 |
1 3/4-6 |
10 |
5-7 |
15 |
5-7 |
20 |
| DOAF-Z |
0-3/4 |
5 |
0-1 3/4 |
10 |
3-6 |
15 |
6 3/4-9 3/4 |
20 |
8 1/2-11 |
25 |
|
|
|
|
|
|
|
|
| DODF-C |
0-1 |
5 |
4-7 |
10 |
4 1/2-7 |
15 |
4 1/2-7 |
20 |
4 1/2-7 |
25 |
0-1/4 |
5 |
1 1/2-6 |
10 |
5-7 |
15 |
5-7 |
20 |
| DOOF-A |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| DOOF-AA |
0-1 1/4 |
5 |
3-6 |
10 |
6-8 1/2 |
15 |
6-8 1/2 |
20 |
6-8 1/2 |
25 |
0-2 |
5 |
2 3/4-6 |
to |
5-7 |
15 |
5-7 |
20 |
| DOOF-AC |
0-1 |
5 |
2 1/2-5 |
10 |
2 1/2-5 |
15 |
2 1/2-5 |
20 |
2 1/2-5 |
25 |
0-1 |
5 |
2-7 |
10 |
5-7 |
15 |
5-7 |
20 |
| DOOF-G |
0-1 |
5 |
1-4 1/2 |
10 |
5 1/2-8 1/2 |
15 |
8-10 1/2 |
20 |
8-10 1/2 |
25 |
0 |
5 |
1-7 |
10 |
5-7 |
15 |
5-7 |
20 |
| DOOF-T |
0-2 |
5 |
5-8 |
10 |
9-12 |
15 |
10-12 1/2 |
20 |
10-12 1/2 |
25 |
0-1/2 |
5 |
1 1/2-6 |
10 |
5-7 |
15 |
5-7 |
20 |
| DOOF-U |
0-1 |
5 |
2-5 1/4 |
10 |
6 1/2-9 3/4 |
15 |
9 1/2-12 1/2 |
20 |
10-12 1/2 |
25 |
|
|
|
|
|
|
|
|
| DOOF-V |
0-1 |
5 |
1-4 1/2 |
10 |
5 1/2-8 1/2 |
15 |
8-10 1/2 |
20 |
8-10 1/2 |
25 |
0 |
5 |
1-7 |
10 |
5-7 |
15 |
5-7 |
20 |
| DIAF-CA |
0-1 |
5 |
0-1 3/4 |
10 |
4-7 |
15 |
5 1/2-8 |
20 |
5 1/2-8 |
25 |
0 |
5 |
1-7 |
10 |
5-7 |
15 |
5-7 |
20 |
| DIAF-GA |
0-1/2 |
5 |
0-1 1/2 |
10 |
1 1/2-4 1/2 |
15 |
4 1/2-7 |
20 |
4 1/2-7 |
25 |
0-1 |
5 |
2-7 |
10 |
5-7 |
15 |
5-7 |
20 |
| DIAF-HA |
0- 1/2 |
5 |
0-1 1/2 |
10 |
4 1/2-7 1/2 |
15 |
7-9 1/2 |
20 |
7-9 1/2 |
25 |
0 |
5 |
1-6 |
10 |
5-7 |
15 |
5-7 |
20 |
| DIAF-KB |
0-1/2 |
5 |
0-1 1/2 |
10 |
4 1/2-7 1/2 |
15 |
7-9 1/2 |
20 |
7-9 1/2 |
25 |
0 |
5 |
1-5 1/2 |
10 |
5-7 |
15 |
5-7 |
20 |
| DIAF-LB |
0-2 |
5 |
6 1/2-9 |
10 |
6 1/2-9 |
15 |
6 1/2-9 |
20 |
6 1/2-9 |
25 |
0-1/2 |
5 |
2-4 |
10 |
2-4 |
15 |
2-4 |
20 |
| DIAF-NA |
0-1 |
5 |
0-4 |
10 |
5-8 1/2 |
15 |
6-8 1/2 |
20 |
6-8 1/2 |
25 |
0-5 |
5 |
5-7 |
10 |
5-7 |
15 |
5-7 |
20 |
| DIDF-BA |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| DIDF-BB |
0-1 |
5 |
1-4 |
10 |
5-7 1/2 |
15 |
5-7 1/2 |
20 |
5-7 1/2 |
25 |
0-1 1/2 |
5 |
2 1/2-7 |
10 |
5-7 |
15 |
5-7 |
20 |
| DIDF-CA |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| DIDF-EA |
0-1 1/2 |
5 |
3 1/2-6 1/2 |
10 |
7 1/2-11 1/2 |
15 |
9-11 1/2 |
20 |
9-11 1/2 |
25 |
0-1 |
5 |
2 1/2-7 |
10 |
5-7 |
15 |
5-7 |
20 |
| DIDF-FA |
0-3/4 |
5 |
0-3 |
10 |
5 1/2-8 |
15 |
5 1/2-8 |
20 |
5 1/2-8 |
25 |
0-5 |
5 |
5-7 |
10 |
5-7 |
15 |
5-7 |
20 |
| DIDF-GA |
0-1 |
6 |
0-3 |
10 |
2 1/4-5 1/4 |
12 |
4 1/2-7 |
14 1/2 |
|
|
|
|
5-7 |
11 1/2 |
|
|
|
|
| DIFZ-A |
2 |
5 |
5 1/2--7 1/2 |
10 |
5 1/2-7 1/2 |
15 |
5 1/2-7 1/2 |
20 |
5 1/2-7 1/2 |
25 |
0 |
5 |
1 |
10 |
2-4 |
15 |
2-4 |
20 |
| DIFZ-B |
0-2 1/2 |
5 |
5-8 |
10 |
5-8 |
15 |
5-8 |
20 |
5-8 |
25 |
0 |
5 |
0-2 |
10 |
3 1/4-7 |
15 |
5-7 |
20 |
| DIFZ-C |
0 |
5 |
2-5 |
10 |
7-10 |
15 |
8-10 |
20 |
8-10 |
25 |
0 |
5 |
2-3 |
10 |
2-4 |
15 |
2-4 |
20 |
| DIMF-AB |
0-3/4 |
5 |
3/4-4 |
10 |
6-9 |
15 |
8 1/2-11 1/2 |
20 |
9 1/2-12 |
25 |
0-1 1/2 |
5 |
2-4 |
10 |
2-4 |
15 |
2-4 |
20 |
| DIMF-BA |
0-1 |
5 |
1/2-3 1/2 |
10 |
5-8 |
15 |
8 1/2-10 |
20 |
8 1/2-10 |
25 |
0-1 |
5 |
2-4 |
10 |
2-4 |
15 |
2-4 |
20 |
| DIMF-FA |
0-3/4 |
5 |
0-1 3/4 |
10 |
2 1/4-5 1/4 |
15 |
6-9 |
20 |
8 1/2-11 |
25 |
0-1 1/2 |
5 |
2 1/4-6 |
10 |
5-7 |
15 |
5-7 |
20 |
| DIOF-AA |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| DIOF-AB |
0-1 |
5 |
2-5 |
10 |
5-7 1/2 |
15 |
5-7 1/2 |
20 |
5-7 1/2 |
25 |
|
|
|
|
|
|
|
|
| DIOF-BA |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| DIOF-BB |
0-1 |
5 |
1/2-3 1/2 |
10 |
5-7 1/2 |
15 |
5-7 1/2 |
20 |
5-7 1/2 |
25 |
|
|
|
|
|
|
|
|
| DIOF-CA |
0-1 |
5 |
4---7 |
10 |
7 1/2-10 |
15 |
7 1/2-10 |
20 |
7 1/2-10 |
25 |
0-2 |
5 |
3-7 |
10 |
5-7 |
15 |
5-7 |
20 |
| DIOF-GA |
0-1 |
5 |
0-2 |
10 |
3-6 |
15 |
6 1/2-9 1/2 |
20 |
8 1/2-11 |
25 |
0-2 1/2 |
5 |
2-4 |
10 |
2-4 |
15 |
2-4 |
20 |
| DIOF-LA |
0-1 |
5 |
1-4 1/2 |
10 |
5-7 |
15 |
7-10 1/2 |
20 |
7-10 1/2 |
25 |
0 |
5 |
1-7 |
10 |
5-7 |
15 |
5-7 |
20 |
| DISF-BA |
0-3/4 |
5 |
0-1 3/4 |
10 |
2-5 1/4 |
15 |
6-9 |
20 |
8 1/2-11 |
25 |
|
|
|
|
|
|
|
|
| DIVF-AA |
0-3/4 |
5 |
0-2 |
10 |
3-6 |
15 |
5 1/2-8 1/2 |
20 |
6-8 1/2 |
25 |
|
|
|
|
|
|
|
|
| DIZF-AA |
0-1/2 |
5 |
0-1/4 |
10 |
0-2 |
15 |
0-2 1/2 |
20 |
0-2 1/2 |
25 |
0-6 |
5 |
5-7 |
10 |
5-7 |
15 |
5-7 |
20 |