Spoke with Sam@Stillen and he said s4 with stock ignition can run the gap at .042-.044 but if really racing then down to .035. He thought .041 is a good mix between the two with the HKS DLI II.

From experience he said that I'm totally going to love the DLI twinpower with the stage4 and going to wonder why I haven't don't it before. About the biggest simple bolt-on increase they've seen with the s4. Better response, smoother and more clean power which surprised them because they thought the stock ignition was plenty strong. The DLI extends the duration of the spark as well as magnifies it.

They are also back to giving Nissan more mod time.