No problem jumping in Jimmy,

I like to have lots of folks involved. We can all learn from what other guys are doing. It makes the forum better. It also gives YS users a place to share their experiences and such. We just don't to turn this place into a gripe forum. And your input is not doing that. I appreciate the help and advice in the forum as well as others.


Yes the 10-10.3K is on the high side for sure but it suits the application...I would suspect at those rpms there might be a few more failures or parts. That is working them pretty hard. But in a pylon racing application motor work is a common thing. I don't know have specific experience with the engines in that application but I have heard they are awesome in those racers.

I would not recommend this type of use for every day every flight for engine longevity but its all a matter of how you choose to run them.

I remember a few years ago the hot engine for War Bird racing down here in AZ was the 120SC on 30-40-50% nitro and it was making huge power in the Top Flight 60 size war birds like the P-51 and P-47.

Troy Newman
Team YS