well that is a LOAD OF RUBBISH :
But double the compression, change the ignition timing curves, and get a bigger and more aggressive cam profile, and Wow! They can blow themselves apart with the actual power they then can produce!
that is, they can split the cast aluminum heads, crack pistons, and crush their own connecting rods!
So it your going to try running the real HHO gas, beef up your engine first or it will be a big disappointment power wise and an expensive rebuild if you don't do it right!
UNLESS your doin the 1/4 mile in 5 seconds or under , then you`d be worried about splitting heads and blocks.., MAYBE,,
DOUBLE the compression on a petrol engine , you might as well run diesel......
double th ecompression on a petrol and you`ll never start it...