46 FX muffler
 

I am going to instal an OS 46 FX in a Seduction Freestyle. I have seen posts mentioning the Tower muffler for extra power, but a search yeilded very little. Can someone give me a comparison between the Tower and an Ultrathrust? What is the part number for the Tower muffler?

Thanks,

Bryan

RE: 46 FX muffler
 

I too have read that,I was told it should give about 500 rpm less then a nelson Expansion muffler.But I 'm not sure what that equates to.I ordered a Rossi tuned muffler for the .46fx from Morris hobbies.Supposed to add 1-2000 rpm and weigh less then the stock version.

RE: 46 FX muffler
 

I was curious also if the Tower muffler was better than the stock OS muffler also. Buddy of mine had one on his plane and I asked if it made a difference on the power. He said he really didn't know since he did not TAC it before it was put on. So we cranked my engine up with stock muffler and put TAC on it to see what it was running. We then took the stock muffler off and put the Tower Muffler on it to see the difference. It did work and make a difference, I cant remember what rpm's it was at but I know it was like a 800-1000 rpm difference. It was a while back when we tried it out. So after that I went ahead and ordered me the Tower pipe.

You cant beat the price at $14.99 and don't think the charged shipping since it was a Tower product.

http://www2.towerhobbies.com/cgi-bin...?&I=LXCLH6&P=7

RE: 46 FX muffler
 

I too know that a tower muffler works, but you might try to remove the baffel in your stock muffler. be sure to remove both the screws and the nut and the baffel should come right out. You should get ovwer 500 more RPM and it is a FREE alternative.

RE: 46 FX muffler
 

i HAVE owned the tower muffler on a 46fx and DOES make a difference, and for 14.99 its a great deal.

RE: 46 FX muffler
 

Hey DM what size prop is that? I have a stock 46fx, and I was thinking of putting on a tuned pipe to get more power for my fazer as it struggles to put out of a hover. Is the tower muffler as good as a pipe?

Also wouldn't pulling out the baffle from the stock muffler upset the idle of the motor and make it as loud as hell??

RE: 46 FX muffler
 

Yes, you certainly get more power. I don't recall the exact number but +1000 rpm is not crazy.

You also get more noise and the unpleasant crackle of an unbaffled two stroke exhaust. You win some you lose some. A quiet pipe is better, though more $$$, alternative IMO.

RE: 46 FX muffler
 

3D knows what's up, take the baffle out of the OS stock muffler and there ya go. Put your tach on it before and after and you will see the same difference as you would with the other muffler.

You can also dremel away some of the inner diameter of the stinger on that muffler to squeeze a little more out if it.


Dbow

RE: 46 FX muffler
 

Ive got a 12x4 APC ona 3.75lbs Uproar 40. I can hover the thing on the deck at 1/2 throttle, and rocket out of a hover.

Taking the baffel out of the stock muffler will add power, but reduce smooth idle, and smooth throttle transitions. The engine will also quit more (trust me i tried it!)

Hope i helped somewhat,
David

RE: 46 FX muffler
 

Thanks dude, I thought doing that would cause problems. I am also running a 12x4 apc prop, but my fazer weighs in at a little over 4lbs. Do you think running a tuned pipe is worth it? or should I try the tower muffler?

RE: 46 FX muffler
 

I am surprised that nobody has mentioned the MACS pipe. They are VERY light about $20.00 I think. Been a while. Give you good power and throttle response, and they are a bolt on replacement. They also have a greater angle away from the airplane to give you less goo on your model. I believe tower has them.

RE: 46 FX muffler
 

I guess I am the only one using an escomposites.com carbon fiber pipe on my 46fx, the mac header, coupler, 2 spring clamps and cf tuned pipe with 3 baffles weighs 25% less than stock os muffler, I get 25% more power and a very linear throttle transition and instant power for 3d, It does cost $100 but I have been using it for over 5 years on four diff airplanes and 3 diff engines. it also redistributes the weight back off the nose. it is so quiet that many people think it is an electric - last year at an airshow I hovered my diablotin side by side with an electric diablotin - mine was much quieter - you cannot hear anything. which is great when you are hovering next to your ear.

RE: 46 FX muffler
 

Hey pizza, do you have a link with the part number required for your setup on OS46FX?
A picture would be great too! I am whilling to try it on 4.5lbs Laser 3D

RE: 46 FX muffler
 

there is a picture on website www.escomposites.com it is the smallest tuned pipe they make, you will need the mac header for your engine they come in different sizes depending on how much drop you need to clear the fuse under airplane. you only want 1/8" between pipe and header to get max performance.

RE: 46 FX muffler
 

They are also good mufflers, and light.

But in an honest opinion i think the tower muffler is the best "bang for the buck" here, and good luck finding the macs for $20, more closer to $40.

Tower muffler....$14.95
Cant beat it

David

RE: 46 FX muffler
 

i lost the muffler from my tt 46pro and put a os 40-46 muffler on and the power was cut in half,i removed the baffle, drilled out the exit and still no power.
when i replaced it with the thunder tiger muffler it wasnt much louder but the power was back.
price is about the same at $15.00

RE: 46 FX muffler
 

My Laser3D is 5 lbs [:o]

RE: 46 FX muffler
 

Hey 3D fanatic
One of my friends has built the laser 3D and weight 5 lbs too. He recommend me to replace the plywood fuse by 1/4 balsa stick to save weight. I think i am going to scratch build that plane from the original plan and put an OS46FX with hobbico muffler from Tower hobbies.

The weight should be around 4.5 lbs. Do you have any other idea to save weight on the laser 3D?

RE: 46 FX muffler
 

Guys I have quite a bit of time on an OS 46 FX with a stock muffler and the Tower muffler. Flying a 4 1/2 lb Sig something extra with the stock muffler,11.5x4 APC prop. This combo had plenty of power to hover and climb out with authority. I got a U-Can Do 46 and installed the engine out of the something extra. Put a Tower muffler with the same prop and it gained 1800 RPM. Also the midrange is much smoother. Throttle response is almost electric like. As you guys know a UCANDO is a large airplane for a .46 and it fly awesome with this set up. The guys in my club can't believe its not a .50 SX. Anyway short version the Tower muffler is a great buy and in my experience a full tuned pipe would be the only thing that would out perform it. Not in price or weight but slight bit of top end. The fellow with the Thunder tiger. The reason an OS muffler doesn't work on the TT is they are not port matched at all. Where the stock TT muffler is matched to the engine. Just because they bolt on doesn't mean it will work as good. Jason

RE: 46 FX muffler
 

I would go with the Tower muffler also. It is so cheap and no shipping or handling. Plus it has a good sound to it.

As for a full length pipe you will gain rpm but it will run like a engine with a pipe. From ones I used before being one of them MAC's is that pipes don't like smooth slow gradual transitions. They start off good then get to a point where the pipe kicks in and the rpm's jump. They will jump off and on pipe fast but the smoothness that would be needed say in a hover would not be as pretty.

Maybe all pipes aren't like that but from ones I have they are like that.

Now I have and MVVS pipe on my 77 and it gets up on pipe at a very low rpm. The rest of the throttle range is smooth except for that first burst when it kicks on pipe. Before when I had a different header the pipe was acting against me when trying to hover. I would pull into a hover and it would pull vertical. But if I backed off to steady the hover it would run off the pipe and start to fall. Then I would add to regain vertical and pipe would kick in and it would be to much. I messed around with that over and over and it was agravating. Thats reason I went with another header also.

Oh back to point. That Tower Muffler works good!

RE: 46 FX muffler
 

I know exactly what you are talking about, ed at escomposites spent nearly 6 months changing header length, distance to first baffle, size and shape of baffles, number of baffles, different overall volumes to get a throttle response that is unmatched in the industry. eds pipes are tunned mufflers for bottom not top end power. they do not increase top end power much over stock mufflers, but improve the power curve between 1/4 and 1/2 where it is needed the most for 3d and sport flying. this pipe gives me the confidence I need to hover and rolling harrier close to the ground. I do not use any programed throttle curve just straight linear.

RE: 46 FX muffler
 

carbon fiber tuned pipes and alum pipes are very much different. alum retains heat, when gasses get hotter they expand and creates more pressure which bosts power, so it is hard to get a linear throttle curve and there is always going to be a boost effect somwhere in throttle curve. alum tuned pipes are also very sensitive to environmental changes requiring constant needle valve adjusting even between flights. CF pipes on the other hand stay very cool, you can almost hold on to the pipe while engine is running, gas temps stay fairly constant thereby giving a smooth power band. also they are very quiet - you do not get that tinggy alum sound. I have not adjusted my needle valve in over 2 years flying in summer and winter. this is not advertising, I do not profit from the sale of these pipes, I just feel like they are required equipment not optional. my cf pipe is the most important piece of equipment on my 3d plane. I could not get by without it.

RE: 46 FX muffler
 

I odered my tower muffler today, it should be here (australia) in 10 to 30 days. Looking forward to trying it out. Cost $27 US including postage which is about $36 AUS still a very cheap muffler. Most tuned pipes here sell for around $100 AUS, so if the only thing that out performs it is a tuned pipe I think I got a good deal. Only time will tell.:D

RE: 46 FX muffler
 

hEY ! I have a 60` 5 lb 3D plane that pulls out of hover very well with an os 46fx+tower muffler!!

RE: 46 FX muffler
 

Hey Daniel Z, that airplane looks like it has a huge side area, and in front of the wing, is that a scratch built? looks like it should weight 8lb but only weighs 5? wow, can we see a picture of it hovering?