ORIGINAL: erizzi
Thanks all, very helpful!
ORIGINAL: mtwister
If you were to read back a ways, you will see I first built this plane with the Moki 1.8. Wit hthe tank in the stock position it was way to far away from the carb, I too couldn't get rpm's, even trying 3 different mufflers. I ended up using a Perry Pump on it and it worked great. Don't worry about weight, this plane can handle it. I took the Moki off and put a DL gasser on it and haven't looked back since.
Thanks, this is really interesting! Would you be so kind to tell me which pump you used (so i can find it, say, on towerhobbies or such)?
ORIGINAL: bubbagates
The bisson is actually worse for back pressure. Something to try is to get some steel wool and stuff it into one of the pipes on the muffler. This will increase back pressure and not block exhaust flow too much. I found a long time ago on an OS160 is yes you can totally block one tube off but the engine suffers since it cannot breath as well. I then cut the tubes and stuffed one with the steel wool and then engine ran much better as it was getting the back pressure and could breath better. This was when using the Bisson muffler
Thanks. Also very interesting. I tried to block one of the exhaust tubes, it didn't help too much. Maybe with steel wool. But you say you cut the tubes, how? And how did you block the steel wool from being pushed outside?
Thanks in advance.
BR
The VP30 is what you need.