What distributor is used on a 1972 250 CID with automatic transmission (49-state)?

Distributor D2OF-DA (basic part 12127), used in Maverick, Comet, Mustang, Torino, and Montego applications.

What is the centrifugal advance spec for the 302 CID D22F-LA distributor (Maverick/Comet/Mustang, manual)?

0-1/2° at 500 RPM, 0-1 1/2° at 750, 2 1/2-4 1/2° at 1000, 8-10 1/4° at 1500, and 11 1/4-13 1/2° at 2000 RPM, with the test stand set to 0° at 250 RPM and 0 in. Hg.

How are the vacuum advance figures measured in this chart?

Vacuum advance is given in degrees at 5, 10, 15, and 20 inches Hg, with the test stand set to 0° at 1000 RPM and 0 in. Hg.

Do California cars use different distributors than 49-state cars?

Yes. The chart lists separate distributor numbers for 49 States and California — for example, the 1600cc Pinto manual uses 721F-YA (49 states) or 721F-TA (California).

What vacuum retard does the 240 CID D2AF-BA automatic (Ford) distributor show?

0-3 1/2° at 5 in. Hg, 4 1/2-7° at 10, 5-7° at 15, and 5-7° at 20 inches Hg.

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1972 Ford Distributor Specifications Chart – Advance Curves by Engine & Model

Ford Group 23 distributor specifications chart for Pinto, Maverick and Comet engines

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Ford Group 23 ignition distributor specification table: distributor numbers, transmission and car line, centrifugal advance at 500-2000 RPM, and vacuum advance/retard for 1600cc-302 CID engines.

AI caption August 2009 · Photo 484 of 1001

This document is page 26 from a Ford service specifications manual, Group 23 – Ignition System, presenting a 'Distributor Specifications' table for 1972-era Ford/Mercury vehicles. It lists engine models from 1600cc, 2000cc, and 2600cc (Pinto and Capri) through 170, 200, 240, 250, and 302 CID engines used in Maverick, Comet, Mustang, Torino, Montego, and full-size Ford car lines. For each engine, the table gives distributor part numbers (basic part 12127) split by 49-state and California emissions calibrations (e.g., 721F-YA, 72HF-DC, D2DF-AA, D2OF-PA, D22F-LA, D2AF-CA), transmission type (manual or automatic), and detailed distributor test-stand curves: centrifugal advance in degrees at 500, 750, 1000, 1500, and 2000 RPM (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 in degrees at the same vacuum points (both set to 0° at 1000 RPM and 0 in. Hg). A reader can identify the correct distributor for a given engine/transmission/emissions combination and verify or recurve advance mechanisms against factory specifications.

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Frequently asked questions

What distributor is used on a 1972 250 CID with automatic transmission (49-state)?: Distributor D2OF-DA (basic part 12127), used in Maverick, Comet, Mustang, Torino, and Montego applications.
What is the centrifugal advance spec for the 302 CID D22F-LA distributor (Maverick/Comet/Mustang, manual)?: 0-1/2° at 500 RPM, 0-1 1/2° at 750, 2 1/2-4 1/2° at 1000, 8-10 1/4° at 1500, and 11 1/4-13 1/2° at 2000 RPM, with the test stand set to 0° at 250 RPM and 0 in. Hg.
How are the vacuum advance figures measured in this chart?: Vacuum advance is given in degrees at 5, 10, 15, and 20 inches Hg, with the test stand set to 0° at 1000 RPM and 0 in. Hg.
Do California cars use different distributors than 49-state cars?: Yes. The chart lists separate distributor numbers for 49 States and California — for example, the 1600cc Pinto manual uses 721F-YA (49 states) or 721F-TA (California).
What vacuum retard does the 240 CID D2AF-BA automatic (Ford) distributor show?: 0-3 1/2° at 5 in. Hg, 4 1/2-7° at 10, 5-7° at 15, and 5-7° at 20 inches Hg.