Hey Dave, I've noticed two things with both these props.
13.25x19P even WOT won't get me near redline. From what I've been reading, if I'm WOT and trimmed out, I should be a few hundred rpm away from the redline in order to avoid 'making oil' like some of the F115s like to do.
With the 13x19P, I can get it closed to redline, but there's no increase in speed for ssay the last 1500rpm.. It just makes a bit more noise and doesn't go anywhere You think a 19x20 would help me with both these problems?
I'd love to find a place where I could test out a few props on the same day so I wouldn't have to guess at which one is good for our rig.