Hi all,
I recently got into pylon racing, our rules only allow OS .46 or similar,
Running that engine to its peak gives very short life.
I hate the cost of replacing piston and liner $50 everytime just to be able to practice properly.

I was thinking to practice with different engine or plane to help reduce the cost in the long run,
even that means buying faster expensive engine and run it below peak to reach similar performance OS .46

I have looked into jett engines, .56XL is tempting even though its more expensive, it probably will last longer,
but if I run it below its peak performance, might result in colder running and also shorten the life span.

Other option is to get a ASP 52, get a tuned muffler to get similar speed with lower cost since I could get piston and liner at half the price of OS.

If any one has an idea, please do share you exprience.
Thanksssssss