IN TUNE OR NOT IN TUNE. WHAT'S THE BIG DEAL?

[chiroman]

:roll:
What is the advantage of a tuned muffler over a standard one?

[ronm]

Tuned mufflers sound better 8)

Tuned mufflers (pipes) will give you more top-end power over a narrow rpm range.
For a newbie, not recommended. If you need more power, go to a slightly larger engine instead.

Ronm

[JimMcIntyre]

A properly tuned pipe can provide the best of both worlds; power and quiet.

As ronm states this power boost occurs at a narrow rpm, ideal for helicopters where max power at constant rpm and quiet are all factors. :TU:

Just beware of fences with all that power. :shock: :lol:

[JimMoss]

Jim! :yikes:

That's not one of yours is it?

Jim Moss :)

[Hughes500E]

That is quite possibly the funniest Heli pic I've seen....
It never stood a chance did it....... :shock:

[JimMoss]

That would be one of those good caption pics:

"Told ya, ya couldn't limbo that fence!" :lol:

Sorry Jim :wink:

Jim Moss :)

[JimMcIntyre]

That's not one of yours is it?
No, someone I was chatting with on the internet a couple years ago.

Scary eh? :lol:

[JimMoss]

Especially with the road and Car right there! :shock:

Jim Moss :)

[AJCoholic]

Tuned pipes (actually full length pipes) do not magically "add power" to any engine. Firslt, the engine must be timed correctly to take advantage of the tuned pipe. Many sport engines that are mildly timed will not benefit much from a pipe. Secondly, the pipe must be sized to the engine displacement and prop. This means picking a correct general size, and then running and tuning the header length to get the maximum gains in RPM at a certain RPM setting (usually full power). If you change the prop you have to go do it over again.

There are many "mini pipes" on the market that act like a home made mousse can muffler/pipe, that seem to give a good power boost with no special fiddling. I have quite a few engines run with these that have gained over 1000 rpm. I have currently 3 engines running with full tuned pipes and they really go. The muffled tuned pipes are the best bet, very quiet and still get the tuned effect performance.

The problem with most sport planes is where do you put the pipe?!?

[BEER_BellyToo]

Hi Chiroman to tune or not well look at this

I have a HOTSHOT 45 (boat) with a KB 7.5 with out a tune pipe it has a top
speed of 56 mph on 60 Nitro ok now with the tune pipe on and tuned to max. power it is been clocked at 102 mph with the same 60 Nitro in it the boat is very fast :) so you see a tune pipe that is tuned right can give the most power but it has to be tuned right the motor has to be kepped as cool as you can get to get the max out of it with out a melt down (not a good thing to see happen ) I have a OS 77 that runs at 14,500 rpm with out a tune pipe on it prop size 13x6 apc. when I put the pipe on it and tune it this motor will hit 18,500 rpm with the same prop that motor put's out 4.5 hp at that speed :) so if you need speed be safe in what you do with that motor and tune pipe

[JimMcIntyre]

Many of the mini pipes have a 'wider' tuning giving a mildler power boost but across a larger rpm range. They also benefit from a surpising noise reduction both 'on' and 'off' the pipe.

FWIW

[Fastsky]

The short Maac tuned muffler when used on a 46FX will get 2000 more rpm out of the same prop with no other changes! :P