C50F -J vs C40F-AL Autolite Carbs

Rocket · February 24, 2010 at 10:15 PM

Can someone explain the differences in these two Autolite Carburators for me?

Is one more correct than the other for a 64.5 K code, 4 speed that was made in July 1964?

Thanks

Edited by - SixT5HiPo on 02/25/2010 00:28:46

C6ZZKGT · February 25, 2010 at 9:54 AM Official Post

The only real as built difference between the two are jet sizes. The C4OF-AL uses 51 primary and 70 secondary jets. The C5OF-J uses 52 primary and 68 secondary. Both carburetors are for use with a PCV valve.

-Fred-

jwc66k · February 25, 2010 at 11:43 AM

In the Ford Carburetor Guide (Pony Carbs Inc), a C5OF-J was used after Feb 15, 1965. Prior to that date, the C4OF-AL was used with a C5OF-L tag (pg 94-95). (Note: -L vs - J suffix.)

Jim

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