What distributor advance specs does a 1972 351C-4V manual Mustang use?

Distributor D2ZF-EA (49 States, M trans): centrifugal advance 0-1/2° at 500 RPM, 0-1-1/4° at 750, 1-3-1/4° at 1000, 5-1/2-8-1/4° at 1500, and 10-1/2-13° at 2000 RPM; vacuum advance 0-3° at 5 in. Hg and 2-1/2-5-1/2° at 10, 15, and 20 in. Hg; vacuum retard 0-4-1/2° at 5 in. Hg and 5-7° at 10-20 in. Hg.

How is the test stand set up for these centrifugal advance measurements?

The table states the test stand is set to 0° at 250 RPM and 0 in. Hg for centrifugal advance, and to 0° at 1000 RPM and 0 in. Hg for the vacuum advance and vacuum retard readings.

What do M and A mean in the transmission column?

Per the footnote, M means Manual and A means Automatic transmission.

Are separate distributors listed for California cars?

Yes. The tables have separate '49 States' and 'Calif.' distributor number columns; for example the 1600cc Pinto uses 721F-YA in 49 states and 721F-TA in California.

What distributor is specified for the 460 CID Lincoln Mark IV?

D2VF-BA (both 49 States with 3.0 axle per footnote ①, and California), automatic transmission, with centrifugal advance 0-1° at 500 RPM up to 9-11-1/2° at 2000 RPM and vacuum advance up to 9-12° at 20 in. Hg.

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1972 Ford Distributor Specifications Chart - Advance/Retard Curves All Engines

Ford Group 23 ignition system distributor specifications chart with centrifugal and vacuum advance

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Ford Group 23 distributor specification table listing distributor numbers, engine/transmission applications, centrifugal advance at RPM and vacuum advance/retard at inches Hg for Pinto, Maverick and other models.

AI caption May 2009 · Photo 466 of 1001

This two-page scan (pages 26–27, Group 23 Ignition System) presents Ford's Distributor Specifications tables for 1972-model engines, identifiable by the D2-prefix distributor part numbers (basic part 12127). Engines covered range from the 1600cc and 2000cc Pinto and 2600cc Capri engines through the 170, 200, 240, 250, and 302 CID sixes/V8s on the first page, and the 351W, 351C-2V, 351C-4V, 351C-HO, 400 CID, 429 CID, 429 Police, and 460 CID engines on the second page. For each engine, the tables list separate 49-States and California distributor numbers, transmission type (M-Manual, A-Automatic), and applicable car lines (Pinto, Capri, Maverick, Comet, Mustang, Cougar, Torino, Montego, Ford, Mercury, Thunderbird, Lincoln, Mark IV). Specification columns give centrifugal advance in degrees at 500, 750, 1000, 1500, and 2000 RPM (test stand set to 0° at 250 RPM and 0 in. Hg), vacuum advance in degrees at 5, 10, 15, and 20 inches Hg, and vacuum retard at the same vacuum points (set to 0° at 1000 RPM and 0 in. Hg). Footnotes note '① With 3.0 Axle' and '② All except Thunderbird.' The document lets a reader verify correct distributor calibration curves when testing or recurving a 1972 Ford distributor.

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Frequently asked questions

What distributor advance specs does a 1972 351C-4V manual Mustang use?: Distributor D2ZF-EA (49 States, M trans): centrifugal advance 0-1/2° at 500 RPM, 0-1-1/4° at 750, 1-3-1/4° at 1000, 5-1/2-8-1/4° at 1500, and 10-1/2-13° at 2000 RPM; vacuum advance 0-3° at 5 in. Hg and 2-1/2-5-1/2° at 10, 15, and 20 in. Hg; vacuum retard 0-4-1/2° at 5 in. Hg and 5-7° at 10-20 in. Hg.
How is the test stand set up for these centrifugal advance measurements?: The table states the test stand is set to 0° at 250 RPM and 0 in. Hg for centrifugal advance, and to 0° at 1000 RPM and 0 in. Hg for the vacuum advance and vacuum retard readings.
What do M and A mean in the transmission column?: Per the footnote, M means Manual and A means Automatic transmission.
Are separate distributors listed for California cars?: Yes. The tables have separate '49 States' and 'Calif.' distributor number columns; for example the 1600cc Pinto uses 721F-YA in 49 states and 721F-TA in California.
What distributor is specified for the 460 CID Lincoln Mark IV?: D2VF-BA (both 49 States with 3.0 axle per footnote ①, and California), automatic transmission, with centrifugal advance 0-1° at 500 RPM up to 9-11-1/2° at 2000 RPM and vacuum advance up to 9-12° at 20 in. Hg.