Side drafts

How much time do you have to tune?I ask because I had side draft webers on my sprint car (street legal) and I had to constantly tune the engine. Not quite a daily driver but close, I drive it around town (Livermore) a lot. I finally solved the problem by going to EFI and keeping the carbs as throttle bodies.
And I hear that a lot, they constantly need fussing over, WHY? "I had to constantly tune the engine" is ridiculous, if that is the case these carbs aren't worth a S#*T, other
than linkage deficiencies needing re-sync'd too often what "goes out"?