| Author | Message | ||
| Peter Aduskevich (Slowslowpete) (63.208.84.211)
Rating: |
I want to run my generator exhaust from underneith, through the metal floor and out through the roof. Are ther any hints or tricks that anyone has used to do this before? Also, I need to bring the generator down from 93 db to a more reasonable level (like low 60's). Would the exhaust through the roof hurt the sound level? | ||
| Gary Stadler (Boogiethecat) (68.7.217.217)
Rating: N/A |
I'm planning on doing the same thing in the next month or so. My plan is to weld a section of 2-1/2" diameter electrical conduit between holes in the floor and the roof, and center my somewhat smaller exhaust pipe inside it. That way air can circulate between the two, making what's inside the coach much cooler, it will lessen the sound a lot, and be very easy to both seal and vibration-isolate. Running exhaust thru the roof should make things a lot quieter, but for me the biggest reason is to aim the stink up and away instead of at my neighbor... Make sure you plan on some method to keep rain out of the pipe when it's not running... Cheers Gary | ||
| Don KS/TX (67.210.125.36)
Rating: N/A |
Something to think about, I had a friend that done that, and the long pipe produced a cooling effect on exhaust gases that would fill the pipe with carbon, and then of course make the genset run poorly. He fought that the entire time he owned the bus and never solved it. I always wondered if an insulated wrap on the pipe would have solved the problem. On that same note, he found the exhaust out the roof silenced it very little, the INTAKE was the noisemaker, and when he ran THAT out the roof, silence followed! | ||
| J Clark jc (205.188.209.11)
Rating: N/A |
In reference to Gary S's response. Running the outer pipe through both the roof and the floor solves the rain problem, as the rain water goes right on through to the ground. I have header tape (found @ racing shops) wrapped around the outer pipe to stop heat transfer. in refernce to Don KS, I have been using this method for 12 years with no carbon buildup. I use three set screws at the top to center the exhust pipe at the the top and muffler mounts at the bottom to center the exhaust pipe where it enters the pipe. | ||
| Gary Stadler (Boogiethecat) (68.7.217.217)
Rating: N/A |
I have to admit that my genset is propane, so the carbon thing is a non-issue for me. But it's a good point. My guess is that your buddie's build-up problem is probably just due to the length and diameter of the pipe, but not necessariy the temperature of it, because carbon soot won't "burn" off unless the pipe is at roughly red heat, around 1000 degrees f. But the stuff does stick to everything. I'm actually surprised that his diesel genset would be making so much soot that it would actually clog his pipe in short order. The fixes would be to either use a larger diameter pipe with perhaps even a "service" tee at the bottom for cleaning (just like a mini-version of how they do wood burning stove flues), or tune the engine a bit leaner...or both... And I like JC's idea of the header tape wrap, not so much for reducing heat transfer (which is definitely good), but because it will dampen the pipe's ability to vibrate, and cut down the noise just that much more! I bet woven fiberglas tape from McMaster will work too, if you don't happen to have a hot-rod shop around. Cheers Gary | ||
| christopher96 (68.160.33.120)
Rating: N/A |
my gen smokes. it has about 70 hours on it. the soot buildup is possibly the gen is not working hard enough. thats whats wrong with mine acccording to wrico. chris | ||
| Jim Stacy (32.101.44.6)
Rating: N/A |
Peter, I ran the exhaust from a 6.5 KW Onan through the roof by routing it through a piece of 4" "Class B" double wall pipe as used for wood burners in a house. The exhaust pipe was run through the double wall pipe to the roof giving two air spaces between the pipe and the structure. You can hold your face against the outer pipe when it's in use. I put a flapper from Tractor Supply on the exhaust pipe to keep rain out. I did have to put a drain in the low point of the exhaust pipe to get rid of the excess moisture. The "Class B" pipe is handy since there are fittings available for connection and roof exit that are approved for exhaust. 60,000 miles and no trouble. Jim Stacy | ||
| FAST FRED (209.26.115.28) Rating: N/A |
How did you handle the engine end JIM? Guessing your OHNO is on flex mounts , and probably a slide out , So how does it all hook up? FAST FRED | ||
| Jim Stacy (32.101.44.189)
Rating: N/A |
Fred, We connected a sweep from the muffler outlet down through the bay floor and toward the rear. Both ends of the sweep have welded-on flanges that mate with flanges on the muffler outlet and the tailpipe going to the rear. These flanges are assembled with reusable gaskets and stainless bolts and wingnuts. It does require manually removing the sweep prior to sliding out the gen set for service. The hole through the floor of the gen compartment is enlarged to allow the sweep flange to be removed. This is reduced to minimum pipe clearance by two overlapping pieces of sheet aluminum cut in a "U" shape. About 3/8ths inch clearance around the sweep seems to be enough to prevent rattling when the gen set is running. The gen set is on standard rubber mounts, not the softer inflatable units. It takes a couple of minutes to disconnect the sweep but it rarely needs to be done. Anything else I can tell you? Jim Stacy | ||
| Peter Aduskevich (Slowslowpete) (65.58.185.57)
Rating: N/A |
I thank you all for your thoughts about getting the exhaust through. I was concerned about a solid mount from the exhaust pipe to the outer pipe (sound). also , having a frame bus and a gas generator it looks like i will have to redo the compartment for the diesel.Should i remount the rad. away from the gen. and most of all how do i quiet the gen.,enclosure material etc.. I would like to get it as quiet as possible. peter | ||
| FAST FRED (209.26.115.225) Rating: N/A |
Soundown inside the compartment , preferably the 2 inch thick with 3/4 pound /sq ft sheet lead. FAST FRED | ||
| fbatie (68.34.73.254)
Rating: N/A |
I have mounted my radiator away from the genset and cool it with a squirrel cage fan, which is much quiter than the blades on the ft of the genset. The fan in 120volt which comes on when the generator starts. I got the parts from a heating & ac supply house. In 10 years I have had no problems. I insulated with the soundown and the thing is very quiet. As for going through the roof with the exhaust. I was scared off when a new couch cought fire at an FMCA ralley It would be nice not to blow that exhaust away from others. | ||
| Peter Aduskevich (Slowslowpete) (63.208.83.138)
Rating: N/A |
Did the hot couch have a gas or diesel gen.? Also, is your gen. set on a slide? |
