Carbs for high altitude

[70Bronco1]

Hello to all…
Recently moved to Colorado @ 8,000ft. above sea level. Brought my ‘70 302 Bronco from 800ft. above sea level. Is there a 2bbl already set up for these altitudes. I have a factory Motorcraft 2100 on it now. I will be going back to the east coast in a couple of years. I do not want to bounce back and forth setting this carburetor up for low to higher elevations. Any input would be appreciated.

 

[1969]

You could tune it your self those carbs are not that complex, or take it to a reputable shop in the area. I believe all carbs will have to be fiddled with.

 

[bigmuddy]

If your spending a lot of time between high and low altitudes you either need to become familiar with how to reject the carb or move to EFI so it makes those changes on the fly.

I have a friend that still runs a 2 barrel at altitudes and loves it, however he has to re-jet when traveling from low altitudes (Missouri) then moving to higher altitudes (Colorado) He just carries the jets, changes them out and keeps moving, going or coming etc.

Otherwise, you get to deal with some compromise in jetting that really isn't satisfactory at either altitude.

 

[Jduke]

Changing Jets in an Edelbrock takes like 10 minutes, super easy, not sure on the Motorcraft.

 

[DirtDonk]

There is a specific high-altitude Ford 2150 I believe. I could be wrong, but I’m pretty sure it’s a thing.
I have no idea what it does to compensate. Whether it’s some sort of automatic air bleed, or something else entirely.
As mentioned though, re-jetting is actually pretty simple. And once you’ve done it once or twice, might even be quicker than swapping one carburetor with the other.

Interested in what the experts have to say about the high altitude carburetor though. Never seen one that I’m aware of.

 

[serial car restorer]

If you are not going to be changing elevations back for a couple of years, I'd probably just rejet your stock carb. Or as another option, pick up a used 2100 of similar year, jet it for high altitude and keep the low altitude carb on the shelf for when you move back. Make sure you empty and dry it thoroughly before storage, though.