The International Open Source Hydrogen On Demand Builders Network.
You make a good point Don! I guess it depends on how it warms the intake.
Do you have to keep the intake heater off? Or do you have one?
I would keep the heater on to maintain the gaseous state of the fuel .
An air inlet heater is only common on carburettor engines. Injector systems don't need it.
Any engine runs better with cold air since it is denser. Inter-coolers was made for this purpose.
Anyhow, you should have gas inlet as close to the inlet valves as possible.
HHO is volatile as well as unstable. Should be put to use without delays.