It has been posted several times about putting a PVC pipe on the generator exhaust to take the fumes further away. My question is what size pipe do I use for an Onan 2800KW? Would a small one cause to much back pressure? And lastly do you seal it to the pipe or just let it hang there?
I made my own "Gen-turi" from 3" PVC pipe and used flexible steel pipe to make the 90 degree bend that attaches directly to my Onan generator's exhaust pipe. I made sure the flexible pipe was slightly larger in diameter than the exhaust pipe so I wouldn't affect the back pressure on the generator. Creates a double venturi effect. And NO, the PVC will not melt if you make your extension like the Gen-turi. Enough cool air is pulled up the PVC pipe to keep it from melting.
I think the intent is to use the 'chimney effect' caused by the heat & velocity of the exhaust gases to draw in more air at the not-tight connector, and let the mixed air and exhaust rise. Thus the name 'gen-turi', from venturi. This prevents back pressure from being high, and keeps the stack cooler.
Jim, "Mo' coffee!"
'06 Tiger CX 'C Minus' on a Silverado 2500HD 4x4, 8.1 & Allison ('Loafer's Glory'); '07 Forester 2.5 ( the 'HANDBSKT'); '95 Toyota SR5 V-6 4x4 pickup, ARB locker, Bilsteins, Warn hubs & M8000, etc;
'94 968, M030 swaybars ('DOPPLER')
I suggest the Gen-Turi, and will explain why, But if you are going to do PVC it's 4", However TAKE A LOOK at the Gen-Turi (Made by Camco, sold at Camping World who helps sponsor these forums)
You will see that they start with regular exhaust pipe, a 90 degree "Sweep" elbow, This is about the same size as your existing exhaust pipe (mine is 1/4" larger) on top of that are metal "arms" that hold up the Poly-Carbonate pipe Camco uses. This pipe is way lighter than PVC and can withstand far higher temperatures (Though in truth it never gets so hot I can't wrap my hand around it)
Works great, easy to mount, they thought of just about everything.
NEXT: Flexible hoses from Auto store
This deal with Gen-Turi is to get the exhaust up, up and away
Flex hose, unless strapped to your ladder, can not do this, it just moves it a few feet out, where, in many cases, it becomes somebody else's problem
Having been that somebody else for two weeks.. I'm not pleased with flex hose at all (I had a Gen-Turi)
I'm considering picking up a second Gen-turi, The deal will be simple.. You park next to me, You run your generator exhaust into my rig, You pay me $200 and I'll fix it for you. (NOTE: The Gen-turi retails for 1/2 that)
Nothin adds excitment like something that is none of your business John is Near Kenwood TS-2000 housed in a 2005 Damon Intruder 377
I suggest the Gen-Turi, and will explain why, But if you are going to do PVC it's 4", However TAKE A LOOK at the Gen-Turi (Made by Camco, sold at Camping World who helps sponsor these forums)
You will see that they start with regular exhaust pipe, a 90 degree "Sweep" elbow, This is about the same size as your existing exhaust pipe (mine is 1/4" larger) on top of that are metal "arms" that hold up the Poly-Carbonate pipe Camco uses. This pipe is way lighter than PVC and can withstand far higher temperatures (Though in truth it never gets so hot I can't wrap my hand around it)
Works great, easy to mount, they thought of just about everything.
NEXT: Flexible hoses from Auto store
This deal with Gen-Turi is to get the exhaust up, up and away
Flex hose, unless strapped to your ladder, can not do this, it just moves it a few feet out, where, in many cases, it becomes somebody else's problem
Having been that somebody else for two weeks.. I'm not pleased with flex hose at all (I had a Gen-Turi)
I'm considering picking up a second Gen-turi, The deal will be simple.. You park next to me, You run your generator exhaust into my rig, You pay me $200 and I'll fix it for you. (NOTE: The Gen-turi retails for 1/2 that)
goodcruisin wrote: For those who own this or have made something similar how does it affect noise level?
It just puts the noise up higher so it can carry further. On some generators it makes a more of a thumping or deep drumming noise that is more annoying that the standard exhaust. If you have a diesel it will put the soot up in the air so when it comes down it will cover more things than just the area your stock exhaust was pointed. If you have a gas generator and the wind is right, it can dump the carbon monoxide right into your roof vent or AC unit.
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