You can see a photo of my Modified Smack Booster, and a description of the modifications, at the following link:
http://www.energeticforum.com/renewa...html#post22353
I hope that this proves useful, or at least interesting to those who are thinking of building a Smack Booster, and even to those who have already built one. Dennis ("The Smack") gave the well documented plans freely to encourage people to build and modify the design. Obviously there are other designs, such as the Bob Boyce 101 plate brute force unit, that are more sophisticated and put out more HHO, but the Smack Booster offers about the best bang for the bucks spent (1.7 lpm for about $100), and can be built by anyone who has a bit of mechanical ability. It is a great first-timer project, and if you build it to specifications I don't think you will be disappointed.
By the way, I erred in an earlier post to this thread when I stated my "before and after" results. I went back into some gas receipts that I saved from my "before and after tests," and see that my actual "before booster" miles per gallon was 27 mpg, and my "after booster" value was between 35 and 38 mpg average, which is a 36.5 to 40 % increase. With gas prices being what they are (around $4.10), it doesn't take long to realize a payback on your investment. And, after that, it is like being able to buy gas at $2.50 a gallon. Personally, I think that even $2.50 a gallon is a rip-off price, but it sure beats $4.10.

Happy motoring to all,
Rickoff

Leave a comment: