You are right but you have to take into consideration what happens when it gets into the combustion chamber. Ortho attaches itself to carbon atoms in hydrocarbon chains in the intake, and inters the combustion chamber where energy is released by an ortho to para conversion turning the hydrocarbon chains into simpler chains which are more reactive gases. This is claimed to be a catalytic effect caused by ortho. It is an exothermic reaction for sure. You be the judge of that. This is where the advantage of ortho is to para. The more ortho there is the more energy or the reverse less energy. Not being a chemist this is a simple explanation of how I understand it. I am sure it is much more complex than this but it is the best I can do.Well, I just looked at the molecular energy/mole of ortho VS parahydrogen. The difference at room temperature is very small, about 5%. The difference between pure orthohydrogen and the equilibrium mixture at room temperature is less than 2%.
Now put that aside and look at a reactor that is producing 50% less of ortho. How does this take place? When HHO gas is generated, the surface it is generated from has an effect upon the gas when generated. If that surface has been prepared to be comprised of predominantly detrimental CrO3, then the hydrogen that evolves from that surface will be predominantly parahydrogen. This has been measured and verified and is what happens when you use the commercial method of passivation of stainless steel. It forms a layer of CrO3. This is the main reason I have stopped this process where in the past I promoted passivation and used it my self. The gas will seek equilibrium over time but we are not storing it and are using it right away so there is an advantage to having it right out of the box.
Now a surface that is prepared to promote orthohydrogen is what is ideal or at least one that does not promote parahydrogen. There are other conditions in the reactor that also effect the percent of ortho to para but all others that I am aware of have not been proven other than to increase the efficiency of the reactor and thus results might have lead to some thinking that it was more ortho than just efficiency.
Well any devise that changes the gas after it leaves the reactor and before it inters the intake stream. It either increase the actual gas quantity and or the percent of ortho to para. I am not referring to an amount over the 75 to 25 percent ratio. I am still not convinced that is possible but some say it is. One such device is the S. L. Ruskin patent # 3,228,868. You can Google that. That patent though is referring to liquid hydrogen and the process does not quite work the same for gas. My reformer is proprietary and I am not a liberty to discuss it or how it works at this time. I will say that it has some aspects of the Ruskin patent but is totally different at the same time in how it works. It is not totally developed yet either. It will go through many changes before it is perfected.What is a reformer?