Mechanical fuel injection is more race oriented than for the street. It is also easy to work on and tune, the problem is that most people start out learing how to tune carbs and then try to apply the same methods to fuel injection. I can make my little motor idle at 800 rpm in gear, and launch with a 1.20 short time. Of course it's much happier launching at 6200, but that's more the cam and heads than the injection.