A Jett FIRE .65 will only spin an 11-6 at 15k or so, that is their listed performance and I believe they have to test to that before being released. They're both strong engines, I dunno which one has the edge, but simply increasing the 11-6 to 16k from 15k requires about 14% more power. Now add 2" of pitch, and I'd be very surprised if that .65 is capable of doing what you are asking. Is it known to be able to do so?

MJD