this may sound dumb but alot of this stuff I am still learning.

carb engine gets its a/f from a jet in the carb itself, that adjustment is based on the amount of air flowed by the carb. i.e. if the carb flows more air ( say from increasing boost ) then a bigger jet is needed to keep the a/f the same, correct?

efi gets the a/f from the air sensor and the ecu tells the injector ( the efi equivilent to a carb jet) what they need to do, in effect changing the jet setting constantly to compensate for atmospheric changes, like altitude and temp.

If this is correct and I understand it right then the carb turbo would have to be at a fixed boost level the entire time your on the road in order to keep the a/f where it should be.

that leads me to believe that while the carb is tuned perfect today then tomorrow it could be off, and there is no way on a carb system to run low boost ( to keep fuel economy good, well as good as you can get from a carb) on a daily driver and then turn up the boost when the guy next to you wants to show off.

wait it would be possible to increase boost on the fly in a carb but wouldn't that mean you need your passenger to crawl under the hood to tinker with the carb.

in a point and shoot car I can't say that fuel economy is important and you keep the boost set, but in a daily driver carb is just throwing good money down the barrels.