A jet change, power valve change, accelerator cam change, the list goes on. lol
It only took me a half a life time to figure it out. I ran Carters for many years, too many. lol
I can change JETS faster in a Holley than anyone can in a Eddy. Eddy owners have "minimum" control of jetting with the metering rods/springs, but must remove the top of the carb to change the JETS. And, the jetting on a Holley is much easier to understand than a eddy. Talk about science, on a eddy you have to add/subtract the metering rod into the jet size..... LOL
All the other "tuning" you mentioned for the Holley is for precise tuning. Not that the eddy don't NEED it, it just don't offer it... LOL
