I consider my Super Tiger 90's to be much more robust than my ASP 108. They turn a 14-6 at 11,200 at 60 degrees. I had a 15-8 on my ASP 108 and it would turn 8,800. I cannot remember what the S T's did with the 15-8 but it was somewhere slightly above 9000 if I remember.

There was a OS 90 at the field and I thought it did alright. It had a 14-6 on it and sounded good but don't know what it was turning. He destroyed the plane and went on to someting else for now.

I think the new Magnum XLS 91 to be a very good engine.

Magnum, ASP, SY, & SC are all the same thing made by the South Aero Engine company in Hunon, China.

jim