My bet goes for an RB X12 (or if you can afford it: RB X12 Rody) with an X12 pipe with RB short manifold (lenght of the pipe and manifold: 102mm). Novarossi S3 is another real good engine too.
Drill up to 5.1mm the stinger and you'll have a combo with a incredible launch and acceleration. For high speed tracks, change the pipe for a Novarossi 52604 model (In-line model) and you'll have lots of medium and high-end rpms.
[quote=MugenDrew;2684554]BATTERIES are for FLASH LIGHTS, gasoline is for cleanin parts, alcohol is for me to drink and well NITRO...everybody know thats for racing.[/quote] :D:D:D