practically speaking, calling upon Jesus name involves repentance. unless you are just conversationally saying JESUS. CALLING upon infers an impetus, a need, and whether you know it or not, that need involves repentance for sin. as someone in one of the post said, Obama? Sharpton? Jesse Jackson? they may call upon His name, but without repentance, what?
Again we are not saved by works but by grace through faith. God doesn’t require perfect people to be saved or you wouldn’t be saved. Neither would I. That should be obvious. God through Jesus justifies the UNGODLY (Rom 4:5).