Saw this on watercar

[HHO BLASTER]

Capturing drive time fuel map use (rpm x load) and (rpm x map) will help tune a balanced leaning and hho boosting. I wrote the software so it's free :) Download "OBD-II Easy Viewer" from http://www.greenfuelbooster.com .... Sample data is included.

[clay85044]

Thanks for the link. I briefly played with you carbon calc, it provided great information on what my truck is putting out. My goal when I build my HHOgen is to double my gas mileage.
I'll check out the site more later and keep in touch.