HPI Staff

What you're missing is that all R/C fuel tanks do basically the same thing, slightly rich when full, slightly lean when empty. The problem comes when people tune their engine too lean, then it gets really lean toward the end of the tank and the engine rapidly overheats. The solution is to run a little on the rich side. Richen it up so that it runs good at 1/2 tank. When tuned properly you can run all day long without overheating.


(Real cars get around this problem by using a fuel pump and a pressure regulator)