how would the nitro sport be with a 2.5r ?(he is debating over the two)
If you want to get a new engine for your revo I suggest the OS.18TM, it is a direct drop in and it comes with all you need to get it running in the revo.
i thought of that but i like the traxxas engine replacement plan. btw: what size in cubic inches is the 3.3?