Originally posted by sport10
For a nice power boost check out the new Morris round pipe to FX conversion available at morris hobbies. This adapts the excellent rossi mini pipe to the OS FX. The power gain is phenominal. I seen a 1500+ rpm gain over the stock engine in most cases. The transition is very linear and fast too. More like a Webra or Rossi. This pipe is lighter than the stock muffler and clears the Flip3d wing better too. I used both a 12x4 APC and a 12.25x3.75 APC with excellent results in both cases. The cost is pretty pricy at 54.00 but it is worth it.
I had this pipe on my flip with a OS 50SX, and it was awesome. WIth just the OS 50SX it would fly OK and pull out of a hover slow, but was lacking that extra escape power. With the pipe it was a rocket. Well worth the $$. It does clear the wing also, since you can move it up or down. 1500+ rpm is about correct. Once thing bad however is that it screams, and when you rev the engine up, everybody will turn and look what the heck is going on. Won't work if you have noise restriction at your field.
Oh yeah, btw the OS 46FX does not like that 12.25x3.75 prop. Does not spool it up fast enough. Try a 11.5x4 APC. I also doubt that the engine will be enough for unlimited 3D. It will however be with the Rossi mini pipe. Just my $0.02