new brushless for stadium truck??

[sleepy23]

well, i will keep this one shorter since i lost my first post.
i currently have a mgm80 and a 6s motor in a highly modified t4 i use on the street only. this current setup on a 2s lipo is sending me up to 50mph with current gearing. I have a 3s that i plan on using for very short speed runs. my question is what system could i step up to that is lighter/faster/stronger and can be run on a 2s or 3s lipo pack?
thanks