Neverfastenuf, sounds like you got the cool job ! Just drive em . If they don't work right ,take it back and tell someelse to fix it .
Maybe some tunnels don't prohibit the bottles ,you maybe right . But I know of many that do . MAybe not all . THey are very clearly marked ,those that do prohibit it . I have also seen in several large cities I've gone through where it's posted ,you must take the bypass when carrying this type of tank or cylinders . What about Nitrous oxide ? I've used it before on diesels . AT least the NOS isn't explosive . WHat type of power gain do you get with propane system . I have info here on it ,but it has no horse power #'s.
But like you said before . SOme of these engine systems push the limits . I don't think I would recomend installing the propane on top of a chipped motor . I have seen people putting 500-550 hp on the ground out of their power stroke or dodge ram ! Man , Something has to give somewhere ! In my own opinion ,I think that making 1 horse power per cubic inch should be well with in the safe range of an engine . However diesels do make extreme amounts of torque .
innthered, Do you do this research professionaly or just a hole lot of personal experience ? The Ford duallies lack a little on the mileage .THey have low profile tires and low 4.10 gears .that really herts them . I had a 1999 crew cab dually and a 1999 crew cab single wheel . The dually got exactly 3 mpg less in every way . MY 2000 single wheel crew cab (stock)gets about 11 mpg at 75mph ,towing my boat ,and I'm grossing almost 26,000lbs and I'm 12' wide !