Regards

Jim

Best regards

Jim

The 1161-2 carb will have a ECZ-9510-M part number at the back of  the carb or ECZ-M on the tag.  This particular carb (according to my literature) is listed as having the sea level to 5000’ jetting as #50 for the primaries and #73 for the secondaries.  For 5,000’ to 10,000’ the primary jets reduce to #49 and to #63 for the secondaries.  The jetting on this particular carb does not differentiate between standard and automatic transmissions and this carb is also listed as being used on both 292 & 312 engines in 1956.

Mark.  Do these jetting numbers agree with your literature assuming the carb is a ECZ-M?

Jim.  As far as the power valve goes, you’re likely going to be stuck with what comes in the carb rebuild kit.  Where the power valve needs to open a little sooner, drawing 2 or 3 of the pv spring coils together with a pair of staples can get you there but it’s trial and error doing it this way.  The Ford parts book actually lists a variety of power valves for the different Holley 4000 applications but no specifications or rates for these are given.

Lorena, Texas (South of Waco)

My goal is to make sure that I have a correct starting point, as I don't know the history of the carbs I have.  Needs are primary mains, secondarys and power valve.

Thanks for any help

Regards

Jim 

Almost forgot. My carb listing says this carb came off a 56 312 engine

that's interesting, wonder why a standard transmission would be leaner. They were more likely to be "lugged" at low RPM, but that wouldn't be helped by the main jet size.

Frank/Rebop

Bristol, In ( by Elkhart) 

Jim