Stihl BR700 custom muffler

[ItalianTuneup]

Hello guys i want to share with you how i made a prototype of the quieter backpack blower in the world. The idea is to remove the chambers inside the stock muffler and build a tunnel with drilled pipe and fiberglass around to low the decibel. it worked pretty good. now it sound much more quiet and smooth. On idle you can barely hear the engine. I ll post mode pictures later about the custom tailpipe and the muffler welded back and done.

The necessity is to have a blower that can be used in areas of my city where people complain a lot about the noise.




The sperimental engine i use for the tests on the table, I had to build a flywheel to compensate the dead points and run smooth even without the fan.

 

[ItalianTuneup]

those are some pictures of the stihl br600 custom muffler job done

the tail pipe looks an old buick from the 70 with straight pipe loool

the tail pipe is important to produce the final note in the sound

 

[ItalianTuneup]

hello everybody, this is an update of my developement, br500 custom muffler super silencer 2.0. on this 2.0 version i ve used another system that gave much better results in terms of decibel. instead of remove the 2 chambers, i left it intact and add insulation to both. I am going to mesure the decibel with a meter soon and post the results on the stock muffler and compare with the super silencer 1.0 and super silencer 2.0

 

[Scrubcadet10]

Well done!

 

[sterobinson]

Maybe you can attach a sound clip, I would like to hear it.