I have the HPI T3.0 in mine and it runs great and has good run times. I would recomend that or an SH .18. They are great engines and easy to tune. Heres the link for the SH .18: [link]http://server.sohouniverse.net/~himotora/shopping/pgm-more_information.php?id=597&=SID[/link]. What price range are you in for the radio?