The Evolution .40-46's are GREAT engines for the price and will produce far more power than the equivalent sized LA engines.

They hold up very well and once dialed in, they tend to be extremely reliable. They'll outlast the OS LA's too.


IMHO the downside to the Evolution deals with the limiters ( something you should adjust or remove ) and getting them dialed in initially.

The OS line beats the Evolutions in spades on this one.

However if you have a bit of patience and preferably help, there is no reason to avoid them. You'll get more power, longevity and value over the equivalent LA's.... Take this from someone who has been running both for years.

Many of our club members have removed the .455 PTS Evolutions from their trainers and placed them into other .40 - .50 sized planes, after years of use in their trainers.... ( I just transferred one to a H9 Twist .40 btw... ).