>Superman VS Doku
Okay /b/, I did my research and solved the question once for all please read, quick facts that proves everything. In one of the fist Dragonball Z series Raditz visits hearth, he scans the power level of a normal man which was 5 power level, lets call it PL.(raditz had the PL of 1200 then) After some research superman speaks his lift at around 100 tons = 100.000kg = 220.462.262 pounds. An avarage human can lift around %40 of his bodyweight as max. An avarage person weights 80kg , 40% of 80 kg is 32kg. 100.000/32=3125. Superman can lift 3125 times more than a normal person = 3125 men.
Remember 1 avarage person had PL of 5. 5x3125 = 15625.
>Superman's power level is 15625
In conclusion, Goku could beat superman after the training with King Kai. After that goku could reach 16000 PL with kaiokenx2
In the episode "over 9000!!" goku could reach power level at around 40.000 if he used kaiokenx4 but only with kaiokenx2 he could reach 16000 and beat superman.
