Thanks for the inputs! I guess I thought heat would infuse the zest flavor into the oil and create a conduit for distributing that into the dough, but then that is why I asked! I recently did spinach and sundried tomato, and noticed they don't impart a whole lot of flavor into the pasta, more color.
I have a micro-plane that I use for zesting like this. I am looking forward to trying this out, to get the correct ratio of zest to give the pasta the essence of citrus.