i have a couple (smaller than usual....46fx) OS engines i'm thinking to convert to gas,
not so much to actually use them on my planes.... more than a project and for fun,but if everything works out great why not put them back on.....

a few success videos i have seen were with similar size engines but they all had ringed pistons.
mine are non ringed with ABC liner.

my question is are these good to go?
or will the higher heat range wear everything prematurely?

any thoughts?

The ABC piston/cylinder fit is highly dependent on the engine running at design temperature. Even changing the nitro percentage in you fuel can throw things off.

Definitely not recommended to run on gas....

AV8TOR