Been searching for a Holley 1920 Economaster for awhile. Got a lead on one but the part # does not fit with my research. Based on research on this site I believe the desired part numbers are 7584, 7585, 7586, 7587.

The carb I found is # 7583. Online research says it was original part on 62-68 Chrysler & Dodge Truck.

BUT, it appears to have the "wagon wheel" that I think distinguishes the Economaster. My car is '72 Scamp, currently with stock carb which operates nicely. My interest is improving mpg.

Will this bolt on, after a rebuild, and work for me?

I would go for it in a heart beat!
Clean it up carefully and do a good job on the the rebuild paying attention to the correct economizer gasket....some can block the accelerator pump hole...
Run a #56 jet and make sure you get a healthy pump shot.

Hopefully it has the dual stage plunger accelerator pump. A very nice feature!

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Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG

The carb you show is for pre-1971 (+pre-1970 California) applications. It has an open/atmosphere external bowl vent, no provisions for a ducted bowl vent to the charcoal can on your '72. Especially with today's alcohol-diluted gasoline, You will lose fuel (and therefore fuel mileage) to evaporation whenever nobody's foot is on the accelerator, whether the engine's running or not. See here. If I were bound and determined to run a Holley 1920 and wanted an Economaster unit, I would hold out for the one that's correct for your '72, which is a 7586.

A couple other reasons I would steer clear of this carb unless I had absolutely no other choice:

1. It's not a spring chicken, and it's got stickers and casting discoloration indicative of having been "remanufactured" in the past -- which frequently spoils the carburetor irretrievably, and

2. if this is actually a truck carburetor, it may not have a car-compatible throttle lever. Some of the truck/van applications required a different throttle lever than was used in the passenger car applications.

Ted, there are no dual-stage accelerator pumps—the accelerator pump's shot is proportionate to the amount the throttle is open. I think you meant to say 2-stage power valve (Holley calls "Economizer"), which yes, all the Economaster 1920s have—along with all the production 1920s starting in 1970.

If I had a 1972 Scamp and I wanted to put the best possible 1bbl carb on it for driveability and fuel economy, I would not hesitate (heh, see what I did there?) to make it this one.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Thanks for the guidance. Given the issues Dan brings up, I'll pass on this carb, especially since mine is currently working just fine. At this time, I'm not ready to spend $200+ on a carb just to see if I can bump up mpg. I'll keep looking for a used one to rebuild.

Do the Carter you reference and the Economaster get about the same mpg?