leanburn, on other engines?
 

Is there anything special about the honda leanburn engines internally? I mean, why do they not suffer from lean run condition that ruins other engines?

Lean burn can be done on other motors, just not quite a lean as Hondas. I run mine around 16.5:1 without any problems so far, although I only do this while cruising.

combustion chamber shape and size play a big roll in being able to have lean burn.

Wards Auto Logo Mercedes Says Dirty Fuel Problematic in U.S.
 

Mercedes Says Dirty Fuel Problematic in U.S.


Looks like sulfur content may play a part in why we don't have more lean burn engines in the US.

Home made lean cruise
 

I'm into the second tank of testing a very basic lean cruise setup on BoB.
I use a digital vacuum sensor on the distributor vacuum advance line to switch a solenoid valve that allows some air to bypass the carburettor at cruise. I also run a basic water induction setup to keep temperatures down.
I don't have EGT or AFR gauges so I'm taking small steps until I get some useful figures to work with.:)