i realize this may be going out on a limb ( by the way thanks for your response ) i'm trying to rule out the pressure being higher as a result of a 900 lbs pressure tank expelling whatever it can through two .018 jets....one would think that could not be much in the traditional sense , however because it's nos it does cause the air to become more dense ....either way it's still the same thing to the engine - is that a fair assumption ?