Originally Posted by
Johnh
Its an interesting question:
There are a couple of videos on Utube and I have spoken to a number of people that have run an engine on straight HHO (all single cylinders) and they all say that to run the engines must be fully choked. ie getting all their charge from the HHO. Personally I find this hard to believe as we know that hydrogen's burn limits are very wide and that with petrol combustion a lot of the power is provided from the non active gases (nitrogen mainly) expanding as they are heated by the combustion.
Its definitely not the case for engines run on straight hydrogen because most of the successful conversions are running unthrottled all the time and only varying the fuel flow to vary revs and power. Why should HHO be so different ?
Just got a 20HP Kohler for some bench tests so in a week or so I hope to have some of my own answers both with straight hydrogen from a aluminium/NaOH reactor and a Tero cell if I get the bits I need.
Regards
John