Motor is set up for low end. At 839cc, running TL, ECWI, 100 octane and 48 novis. Originally it was a 15/20 C75 Skat. Now it is a 18/20 and still cavitating. Root pitch is 18. At the limits with getting much more out of the leading edge. Using a 82mm reduction nozzle and a stubby cone. Going...