do you think that the wasp is more powerful because if you look at duratrax.com under nitro evader upgrades they have a stage 2 performance head for it those things kick ass not only does it have more coling area but they have a lower deck for more compression i can almost gaurantee with that head you will be doing welies all day i like traxxas 20 percent top feul i broke in my st-15 with that stuff it runs powerful and gets exeptional coling.