Originally Posted by
86 50CPRI
OK...Big news!! Unfortunately, my carb guy was NOT able to reference anything from the tag. Being a 'foreign" reference, he did not have a listing. However, he DID give me this:
After sending him the pics of the carb, he was able to determine that it WAS a high altitude version of the standard Motorcraft 2150. He gave me this, too: NAPA 2-5152-A for the carb kit, and 2-452 for the float. Hopefully this will help you get this thing back in business!
Thanks, Rich! Now I need to find a NAPA. The one by me closed last year.
I recently did some more research on the Web and learned that this feature is called an Aneroid altitude compensator, and this description of its intended purpose:
The "altitude compensating" carbs were intended to be a workaround for OEM emissions certification on vehicles sold NEW by NEW vehicle DEALERS, back in the late 70's>late 80's.
Vehicles off the line were emissions certified at roughly "sea level" operating conditions. If the same vehicle was sold/delivered say by a dealer in the Denver area or Cheyenne, or Helena (just examples), then the fuel delivery system (carb) was SUPPOSED to be "tweeked" PRIOR to delivery, per explicit Technical Service Bulletin information using EXPLICITLY spelled out service parts. This "maintained" the vehicle as being in emissions compliance at the point of delivery and in essence, the selling dealer became a "manufacturer" under the law.
The "compensating" carb concept was really an effort for the OEMs to be able to maintain emissions compliance in ALL vehicle markets, WITHOUT having to pay a dealer (warranty claim) to bring the vehicle into compliance by reworking the carb.
It was NEVER meant to be "compensating" in the sense that most of you are thinking (the be-all and end-all perfect carb for any operational elevation). The advent of EFI took care of this issue and carbs in general began to disappear from the scene in the mid-80's and were pretty much gone by 1991 (U.S. domestic market).
Source: http://www.binderplanet.com/forums/a...p?t-30725.html
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