You definatlly want to richen it up, I have mine preaty rich to the point not only blue smoke is coming out, but abit of oil too. Just watch your head temp if your running it for along time, I've found that my temps are quite abit higher during longer running periods. It's great for those times when you want to drag race or ride wheelies for show. Also works the bomb for drifting gives you nice punches of power at the right time. People get pretty excited when they see a truck drifting.