RE: Preadtor and engine
I think you are right Crazy4Flight. Daven, what is a good RPM range for the O.S. I get about 16,5K with the Rossi and an APC 8.75x8.75, and the viper is smoking. The viper in my opinion is the better built of the two, howevery the Predator bleeds off speed better than the Vipor. We do a little pylon to pylon thing at our club and this racer would be perfect for that (500'). We also do a flat out race from the end on the field to the other end for fun.