[Hugh R]

Without going into it too much, an organization that I associate with has 4 standby emergency generators they are CAT and John Deere, I can get exact model numbers if needed all are in the 65-80 HP range. The local air pollution district wants them to spend about $10K each to install particulate traps on the exhaust. If they can be de-tuned to under 50 HP, they become exempt from the P-trap and air district permitting. These generators are diesel and all are less than five years old. I don't know generators very well, but I believe industrial generators like to run at a fixed RPM and as the load increases, they increase fuel flow and air mixture to increase HP to meet the load demand.

Can a modern fuel injected diesel generator like this be de-tuned from say 65 hp to just under 50 HP by putting some kind of fuel flow limiter in line, or some kind of stop on the how far the intake manifold is allowed to open?

Selling the generators out of the state of CA and buying new ones is not economically feasible.

Thanks for any input and suggestions.