Lead Balloon
"Lean misfire" and "roughness" while leaning is actually vibration caused by the imbalance in the power outputs of different cylinders.
Sure but that is the basis of my point, not an answer to it.
many engines come out of the manufacturer or maintenance shop with poorly set up fuel/induction systems...The term "conforming engine" is shorthand for one that's been set up properly
Yes, but:
"even if you have a brand new perfect factory engine, that has a perfectly calibrated set of factory fuel injectors in the engine, with a perfect set-up on the fuel system, the engine is still not going to run smooth" (George Braly, GAMI)
So how do you get a carburetted engine with "fuel/air ratio's that are near to equal on all cylinders", ready for jabawocky's 'eyes closed, big mixture pull, feel the decel = safe LOP even at 500'/full power, engine monitor not required' technique? Genuine question.
Here is a selection of quotes from the GAMI website:
"Not all GA engines can run safely LOP. Carbureted engines, for example, lack precise fuel/air metering systems and typically run rough and lose power LOP
...it's not just a matter of pulling back on the mixture. The airplane and engine must be properly equipped for lean of peak operations otherwise you can do serious serious damage to the engine..
You need balanced fuel injectors and a good multi probe engine analyser that shows EGT and CHT for all the cylinders. A single probe EGT/CHT set-up is just not acceptable
If you don’t have matched fuel injection nozzles and a six-point engine monitor, you just don’t have enough information for lean-of-peak operations."