RE: HELP! Slow REVO with Sirio .23...
Im not a big fan of the sirio maxx/ revo engines. I had the .18 in my Maxx. First I drilled the stinger in my stock pipe then I put the big bore pipe on it. It never seemed to have the power I expected plus I lost my wheelies on command. I think i might go with the Rb or the Os 18 thats if I swap the engine at all. Im going to need to see some awesome Reviews before I dump the 2.5. I run traxxas 33 % and Os #3 plugs and i think the 2.5 is a pretty good mill. I think the Sirios are over rated.