Originally Posted by zipperfoot

I think the number one mistake people make is putting in more motor than they need. Kind of like driving a ferrari to work in rush hour traffic every day. Feeds the ego but has liitle practical use.

13.5 on a technical track is plenty. If you find you need more speed, which i doubt, you can adjust gearing accordingly. Sure a 10.5 or faster may be fun on some tracks, but if you are looking to race and be competitive my two cents says go with what you can handle, and what the track requires, nothing more.