Mndefender Posted September 22, 2022 Share Posted September 22, 2022 (edited) Created this inexpensive DIY spark arrestor/silencer device. It’s a 1 1/2” to 2” exhaust pipe adapter, with a 2” washer welded on the end with a 3/4” center hole and 8 - 3/16”. There is fine stainless steel mess right behind the washer. The inside of the 2” portion of the adapter is filled with one stainless steel (Scotch-Brite) scrub pad. A self tapping bolt holds it in place. The existing tail pipe had to be bent upwards to make room to slide the silencer on. There is no change in engine performance other than the machine is a little less responsive at the upper most rpm range, it takes just a little longer to reach max mph. Hasn’t effected engine temperature either. Tailpipe surface temperature increased about 26 degrees. You may look at my db readings and think it’s not that much of a difference, but the tone of exhaust is much more mellow, and doesn’t have any sharp sounds. It’s a really nice change. The decibel system is not a linear scale of sounds, it’s a average of two factors, so just a couple decibels can be a big change. Here are my db reductions, measured with the iPhone app from NIOSH: -5 db standing 6’ behind the machine at idle. -2.5 db in the cab at idle, all windows closed. -3 db driving on paved road at 25 mph, all windows closed. -2 db driving on paved road at 50 mph, all windows closed. Edited September 22, 2022 by Mndefender 2 Link to comment Share on other sites More sharing options...
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