All, I recently bought a RV-9 with a Superior O-320 with a 3878 carb and a 78915 sump (360). EGTs can differ between cylinders by as much as 300 degrees at times and the engine runs rough. I've looked up the 3878 carb and it shows for use on the 360 engine--not the 320. The engine was assembled by Superior so I presume they were ok with this component combination, but something sure seems wrong. At certain throttle settings, EGT temps are even across all cylinders and the engine runs smooth.
Any suggestions or thoughts would be greatly appreciated!
Mike
RV-9A
Any suggestions or thoughts would be greatly appreciated!
Mike
RV-9A