User blog comment:Vesuvious0215/Wally West/@comment-5185866-20120611030007

Yeah the comics show that he isn't as fast, but he does get faster... i think (someone should probs correct me on this)

But Wally is different to Barry and Bart (i bet its something to do with Meta-Genes), as Bart took the speed gene directly from Barry which is why he is just as fast. Whilst KF just recreated the experiment, and at first he just injured himself, but he slowly gained the superspeed. A side effect of his speed is that he needs to 're-fuel' (eat lots and lots) for energy to run, since his matabolism is really really fast....

He tells how he becomes kid flash in the YJ comics too, but doesnt say why he is limited in a way