DON'T SPRAY ON A STOCK 350z. Unless you're gonna go all out wet shot, direct port, I'd also do either water injection, or methanol injection...deffinitely read up on it as mentioned above. We installed a 150shot and dyno tuned it to a perfect 12:1 afr, and it still floated some valves...and as soon as you start making power it seems like the KS retards the timing...Free engines OW3N...make sure its still underwarranty. and make it to where you don't leave signs that anything was done to it. keep all original parts.