Trying to Quiet a generator with a new automotive muffler

[stevosredneckrepairs]

a car muffler wont do a thing as you have found out lol try a motorcycle muffler for a 4 stroke 100 to 200cc bike that should gi8ve you enough back pressure and quiet it down a lot

[sixtyfiveford]

@stevosredneckrepairs The muffler quieted the exhaust a ton. I tried several exhausts with the auto muffler being the best. Even with that 90% of the sound was coming straight out of the wall of the engine block.

[noblinger]

Make a "doghouse for the generator.

[Landotter1]

Remember that the intake makes a lot of noise too....

[sixtyfiveford]

@Landotter1 Yes, I tried playing around with the air intake as well with only very little effect. When you muffle the exhaust with your hand you can tell that 90 of all the noise is coming straight out of the block.

[Landotter1]

@sixtyfiveford Yeah, mechanical noise is a toughy... how about also isolating the frame with rubber mounts? In aviation, we call them lord mounts, made by the lord company. They are pretty expensive though. Everything aviation related is expensive. :-(

[lar4305]

I did the same thing. I installed a auto muffler on a 4000watt powermate, looks identical to the one you tried it on. Made no difference at all. I dont know what would be worse, the power outage or the noise lol .

[classicallyliberal]

it was a neat idea anyway

[jasonmushersee]

This is also a problem in dairy barns with the noisy milking vacuum pump. Some guys build a small 6'x6' "vacuum pump room" with plywood sheathing & vent fan. Then they use oversized exaust steel pipe up into the attic and back down below grade out to a outside pit (burried 5 gallon pail) to vent the noise. Works great. Yankeeprepper used pvc pipe from his basement generator and went below ground. I would think the condensation within would turn to ice. ?