I was not dishonest. you said HHO is bunk. if you believe it to be bunk it follows that you deem it to be unworthy of consideration in anything other than a negative light. in your original post the phrase "HHO is bunk" is clearly there. seems that you are accusing me of dishonesty to make your position more defensible.
sure you have considered it, all be it with a seemingly heavy bias towards the conclusion that it is a waste of time and energy.
the many sources identifying HHO kits as a scam are all referring to systems which draw their power from the car battery. I am quite happy to concede that this is almost certainly doomed to failure without some mystical deep dark magic that is beyond the realms of our usual physical universe.
you may not be openly asserting that HHO systems do not deliver enough fuel savings to be worth the cost/weight, but you are certainly implying that you believe that to be the case.
it is entirely possible that car manufacturers simply figure that the cost of developing and implementing such a heat reclamation system is not justified by the small gain in efficiency it might offer. I'm not saying it does work. I'm saying it's a possibility.
just because a product is not cost effective for a large manufacturer that is able to develop more efficient systems, that does not mean it might not be something that a hobbyist/ DIY engineer might want to explore for the small gains it might be able to offer.
I mean to say that every indication available is that there is no point, as there are several methods of waste heat recapture in use already but nobody has seen fit to bother with stirling engine powered electrolysis.
If I come off as aggressive or embattled it's because of this flag war going on. I don't mean to take that out on you.
no worries.. flagging is a tricky and dangerous business... i had already guessed you were feeling pressured by the situation. sorry i don't have more SP, my upvote isn't worth much yet...