Zolar1 Wrote:While vacuum does increase MPG, it's most likely that you are pulling water vapor into the mix.
A cell will produce about the same amount of gas with or without vacuum.
I agree with you, and I'm not saying the vacuum thing is a bad deal to others,or trying to insult them. I'm glad they are getting good results but I feel that they are getting wator vapor (or steam) into the engine.
Think about it. Engine vacuum at idle is anywhere between 14 to 20 inches of mercury, depending upon the load of the engine. Deceleration or coasting produces up to and over 25 inches of mercury - heck normal constant speed, vacuum is anywhere between 10 to 15 inches of mercury.
If you take any vacuum guage, and try to suck it down (like a straw) most humans can't pull more than 5-7 inches of mercury. I'm sure all of us has done some sort of siphoning in their life, so you know it's not too difficult to get liquid to move with a little effort.
It doesn't take a rocket scientist to figure out that the vacuum an engine produces could pull liquid through the tubes (no matter what length) through them. Water does steam at a relatively low temp - taking a warm shower will prove that. Combine the vacuum with some reasonable container with latent engine compartment heat and a fine steam could easily be sucked into the system - giving a nice boost in power.
Also remember, applying vacuum to a container LOWERS the boiling point of water (and increasing pressure raises the boiling point - that's why radiator caps increase pressure to 14-18 PSI), so the water solution's boiling point is reduced and much easier to vaporize the water - which would increase the "gas" bubbles! This would explain certain temp drops in the above mentioned cells. Steam can be produced at a much lower temp, and almost instantly removed from the cell (via the vacuum), transferring the heat produced by the cells into the "steam" and off to the engine at a much lower temperature - working much like a radiator pulls the heat out of an engine.
The more I think about it, I think I'm gonna build a water container, mount it in the engine compartment to get the latent engine heat, and run it directly to the intake vacuum, with no HHO producing capability and record my results. Heck if it is good enough, maybe that would be the easier solution to MPG gains, with no wiring?!?!?
That may explain why some report no CEL while applying to the vacuum side - I've seen many a car with a blown head gasket where the water/antifreeze was leaking (ever so slightly to a full blown steam) into the combustion chamber and the CEL failed to light - well until the temp rose due to the lack of water in the cooling system.