with pure hydrogen running an engine i know rusting is a factor, but is it really with a booster?
i mean how much more rust do you guys think a hydrogen assisted car would have compared to not if they were both run from new??  i personally dont think it can be all that much more but this seems to be somewhat of concern. so this is what i thought of for assisted and purley run on hydrogen...
 run the engine for the last predetermined amount of time on gas either switching hydrogen booster or full on hydrogen off ,and running just on gas to "dry everything up". or maybe we could modify a turbo timer to do the job....what do ya think???

Yes, boosters are not a problem at all. I assume most cars crank shaft walls are made of Stainless Steel so those ones will be able to run a car on Hydrogen only.

cool this settles me on the boosting... but what do  you guys think of switching to gas for the last minute when running on soley hydrogen.... i know rust is an issue there

With the idiotic price of oil, I have been researching this subject for awhile but have been become quite disillusioned with the amount of conflicting info that's out there.  For instance, already in this thread there is at least one matter-of-fact statements about car running completely on hydrogen whereas the math makes it clear that to achieve this requires an enormous amount of hydrogen - far more than a booster could produce.  There is more conflicting info regarding engine temp running on hydrogen.  BMW's ceramic engine prototypes appears to have been the catalyst for the prevaling belief that hydrogen combustion results in higher temperatures, whereas the opposite appears to be the case, at least according to one respected OU forum member.  Finally, and the basis of this thread, engine rusting due to hydrogen use.  The current view seems to swing towards rusting will occur, whereas all 'normal' cars will produce copious amount of water vapour when started, and continue to do so until the engine is stopped, albeit, at a much reduced rate.  Now, crack open an engine and there's no rust to be found!  Finally, I ran a car with the head gasket gone on it for several months - it actually looked like one of those 'clown cars', the way the steam belched from the exhaust - when I finally got around to replacing the gasket, I was expecting the valves to be in a terrible state with rust , but it was not so - yes,  there was rust, but not much, which surprised me considering the amount of water it was using... 

I guess what I'm saying is that most of the 'wisdom' out there seems to have become sort of urban legends, passed along chain-letter-style by interested parties, most of whom have not actually tried it out in practice - at least that's how I read it...

yeah i feel that,  and i have not ran an engine on hydrogen... but i have read that if one did,it would only last for 4 years... i think alot of the stuff we read about,that conflicts with other things we read,often goes into the direction of common sense, but the thing of it is that there are enough people to be detered by negative connotiations,that if someone was to try to undermine this technology it could be easily done for the majiority of the populace. and even with the see it to believers they will often just side with the majiority, who usually have no knowlegde of whats really going on, all i was sayin is that if an engine was to rust ,aybe it could be changed back to gas for a second to eliminate any water vapor if any in the cylinder that would sit overnight...i personally dont think rust is an issue but i just wanted to hear what other people, who know shit, had to say about it... the non-believers that i talk to about boosting my car always mention rust, so i just wanted to hear from knowlegable people like yourselves.....   thanks all !

The inside of an engine stays Well well well above the boiling point of water so how would water form inside of the piston chambers?

VDU yes  Bobs PDF is out and production is wild  but its still evolving from raceboat to runs a car !!  this is happening rite now [working out the bugs] also the water only flash plasma steam  chevy v8 s1r9a9m9 would suggest water is a non issue in an ICE   although in his case he does do preventative maintenance during long storage  Chet

good point Bulbz if the by product of hydrogen combustion is water short trips that don't heat up the exhaust system [which is a problem in gas engines] would be murder on an  hho only system