Im on a quest for some more power here. My Lanier Ripper dont fly the best anymore. At full throttle it just barely stays in the air when im toting a streamer. Currently im running a OS .15 CVA and i think i need more oopmh from the motor to fly competively.
So i was thinking of hooking up a mousse can muffler from flying Z since i have a MACs header on the way for it. Question. Should i take the time and tune the header then stuff it in the pipe? Or what everyone else does and stuff the hole header in the can?

Do you think its a setup issue on the plane or the motor just needs a little more power. My plane is just a hare over 2 1/2 lbs empty. When im trying to practice flying with a streamer on it really, really slows the plane down. Then it takes a lot of effort to keep it in the air.