ORIGINAL: combatpigg
It really is shocking to see the tach go over 30K with an engine that is mainly thought of as a medium performance sport model. The numbers look so good, there isn't any motivation to get out the dremel and take a chance on ruining it.
CP --
That was a great call on your part to ditch the carb and go with a straight NVA -- that might be one of the best NORVEL mods to date -- better yet, it's one that a putz like me can implement!!
I'm guessing that Larry's prop is pretty thin on blade area -- that 30,500 is really impressive. I did a few calculations with the APC 5x5. Both props should unload a bit in the air, but I'm betting the 5x5 will unload more -- I wonder how much more you can run over 30,500 and keep the engine together. At 24,400 (a pickup of 3600), the 5x5 will match the 5x4 at 30,500 -- so I'm guessing the speeds may be closer in the air than the static runs indicate.
Can't wait to see and hear the GLAMF flying.