Interested. Is it smoking white at all similar to how a delayed ignition due to cold weather at beginning minutes of startup? If the nitrous oxide has delayed the burn cycle ignition point due to its heat absoprtion capabilities then I would believe your viewpoint. However, until more things are know we can only guess at which I am sure you know. I am not sure though with an excess of oxygen molecules would still show a white incomplete combustion exhuast, albeit, the area in the runner verse the area within the bowl is greatly different at which we will expand in two directions not allowing the entire heat envelope to completely consume the fuel/air charge IMO.