View Full Version : Muffler question, annual time

07-16-2006, 06:31 PM
How many hours can you expect to fly on a muffler. I used a flashlight and could see my flame tube is all curled up, split and ripped, on the right side. Can that be repaired or am I looking at buying a new muffler. The exterior looks good. The muffler has about 300 hours on it. Where is the best place to buy on a muffler for a 0-320. super cub? Thanks Mark

Ruidoso Ron
07-16-2006, 07:52 PM
If the flame tube is warped, it can create a real obstruction to the flow (backpressure) and reduce the power output dramatically. Don't know if that's repairable or not. For the first 6 months that I had my cub, it didn't seem to develop the power I had expected. A new muffler solved the problem in a hurry.

07-17-2006, 01:39 AM
Atlee Dodge sells a heavy-duty muffler...

Steve Pierce
07-17-2006, 06:36 AM
Send it to Dawley. You will get a new one in return.

07-17-2006, 08:07 AM
298.00 for repair from Dawley. I am still checking on a price from Atlee D. for the heavy duty muffler. When removing the old muffler it looks like I have to swing out the motor, Is this right? Thanks Mark

07-17-2006, 09:53 AM
Yes that is right. Swing the eingne and drop the stacks. 40 minute job at the most. The one tough part in getting it back on is the little 3 inch long scat hose that comes off the heat shroud to the cabin heat box. I work it on as I bring the engine back into position. Crash

07-17-2006, 12:11 PM
Atlee sells only a heavy duty muffler for 425.00 thats 125.00 more than having my old muffler repaired. Univair 469.00. Thanks for the help. Mark

07-17-2006, 01:55 PM
Can some one tell me how long a muffler on a 0-320 is to last? Is stainless better? Thanks Mark

07-17-2006, 02:30 PM
I would order an Atlee muffler with a 2 1/2" tail pipe and matching heat shroud. Crash

bob turner
07-17-2006, 08:12 PM
Too bad you are not experimental. If you were, you could rip that tube out of there, and have a hollow can muffler that would not stop you. Don't ask me how I know that.

07-17-2006, 09:04 PM
Bob how do you know? I always wondered about the so called flame tube. Does it reduce the sound or flame or both. Does it cause that needed back pressure. I might keep the burgered up muffler, order a heavy duty from Atlee Dodge. Oh, wait I have got to sell something first, they are expensive! I can use it on my experimental when I build it. What does it sound like with the flame tube out? Mark

07-17-2006, 09:08 PM
Crash has got the idea...755.00 from Atlee. Wish I could go that way, but I am going to have to go with a rebuild. Mark

07-17-2006, 11:17 PM

07-17-2006, 11:53 PM
Can some one tell me how long a muffler on a 0-320 is to last? Is stainless better? Thanks Mark

I don't think anyone heard your question. Use a blue font next time. I have a heavy duty muffler from Atlee on my shelf that has 1600 hours and is still in great shape. My guess is it would have made it to TBO at a minimum. Keep in mind this is Altee's heavy duty muffler and is far better than the stock muffler.

I put an LES exhaust on my engine in it's place so I would have less money in my account. It worked great. I have less money. Not really sure if I got a boost in power since I upgrade horsepower at the same time. My LES leaks significant exhaust in the cab so it either gets welded up tight or goes on the shelf next to my Atlee HD Muffler.

If I switch back to Atlee I'm going with the 2 1/2" new muffler that Atlee makes. Held one in my hand the other day and I liked it. Light weight yet solidly built. Oh and the price seems right.

Good Luck.


07-18-2006, 12:35 PM
This exhaust stack cracked 137 TTSN. My old cub has a muffler on it with 1800 TTSN and still looks good. Saw a 79 cub last year with only 700 TT and the muffler on that was shot. I think if you fly them alot and get them hot to burn the moisture out they last along time.
click to enlarge
http://supercub.org/albums/cubs/crack.thumb.jpg (http://supercub.org/albums/cubs/crack.sized.jpg)

SuperCub MD
07-18-2006, 04:51 PM
If you fly a lot, the flame tube will sometimes just evaporate and disappear. Used to happen to the old working spray Cubs all the time, damnedest thing you ever saw..... :wink:

07-18-2006, 08:01 PM
Is the flame tube what muffles the sound?

07-18-2006, 09:34 PM
I remember seing a good site on muffler stainless steel and chrome, i seen it on this site ,looked cant seem to find it