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Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: gm4106 on January 11, 2008, 06:23:43 AM

Title: Generator exhaust
Post by: gm4106 on January 11, 2008, 06:23:43 AM
I'm getting ready to put a diesel generator with a slide on my bus. Just like to know how some of you ran the exhaust so the slide would work like it should. I was hoping to put it the bay where the condenser coil assembly was. But that bay is not deep enough.The fuel tank is behind it. So I don't want to get a smaller tank. Plus I really want to use the slide. So I'll be using the bay next to it. If some of you all even have pictures that would be great. I just want to get an idea on how to run the exhaust.
Title: Re: Generator exhaust
Post by: tekebird on January 11, 2008, 07:29:03 AM
flexible exhaust hose or a sold pipe with a threaded union ( be sure to use lots of neverseize)
Title: Re: Generator exhaust
Post by: H3Jim on January 11, 2008, 07:31:19 AM
I put mine in  a location where I don't need a slide, its fully accessable by removable quiet box panels.  Not using the slide makes it a little more space efficient and possibly quiet.  Just something to consider.  Makes all the hookups easier too.

I can't help with a location for  a GM
Title: Re: Generator exhaust
Post by: Tenor on January 11, 2008, 08:22:05 AM
I saw a very nice installation in an MCI 8.  It was in the first bay, no slide, but had a nicely built sound enclosure.  Being water cooled, he installed the radiator in the old AC compartment parallel to the rear bulkhead.  Behind it was a squirrel cage to pull air through and out the floor.  Fresh air was also drawn in from the AC compartment with a 5" electric fan and vented out from the rear of the sound enclosure with another fan exhausting out the bottom of the coach.  There was access to the other side of the genset by a removable panel in the enclosure.  I thought it was pretty slick.  He used fiberglass acoustical ceiling panels for sound absorption and built the enclosure from 3/4 plywood.  I'm going to do the same thing in my MCI7.  It was pleasant to talk over with the bay door up and was super quiet with the door closed.  The genset was mounted on 1 inch rubber left over from the packing crate and had almost no vibration transfer.  The exhaust had a flexible coupling (I think) and ran out the bottom of the coach to the rear wheel.  Personally, I'll put a stack on to send the fumes up overhead.
Title: Re: Generator exhaust
Post by: tekebird on January 11, 2008, 03:31:51 PM
my 04. apu originally in rear bay mounted transversly on the drives side on a slide.
that bay held all systems ( tanks, water heater, etc.)

4108 (first one) hard mounted front bay in sound box with through floor air

4108 ( number 2) Driver's side?  on a slide

MC-8 Curb side on a slide

96A3 Curb side on a slide
Title: Re: Generator exhaust
Post by: tekebird on January 11, 2008, 03:35:03 PM
if building one I would put in on a slide in a sound box.

must take special care to give it enough cooling air.....alot of the generator side of things need fresh cool air too.

I'd put it on the driver's side ( reduced noise while camping as you generally will hang out on the curb side.)

for sound insulation I would go with one of the marine sound materials......they are truely made for harsh enviroments and will outlast most stuff people use in the auto industry....and from my experience have better performance as far as deadening sound too.

Title: Re: Generator exhaust
Post by: Tim Strommen on January 11, 2008, 05:01:13 PM
Does the genny need to be running when the slide is out?

If not (i.e. the genny is pulled out for service), a cab-over exhaust coupling may do the trick.  A "kill" switch on the slide (so that the genny will run or attempt to start only when the slide is closed) would be a good safety addition - preventing the genny from running while you are potentially working on it, or when the exhaust system is un-coupled.

If the genny must be able to run while out of the bay (slide extended), a flexible tubing solution will end up being best - if you only intend to run the genny while "in-station" (parked), you might want to look at directly piping the exhaust out the side or bottom of the bay - with the intention of attaching an extension pipe (stowed onboard) to blow the exhaust up and over the bus.  I've seen several of these type installations on busses, S&S, and houseboats.  I've put a picture of a "campingworld" product they call the "Genturi" below.

I do not work for Campingworld, nor do I get any profit from mentioning them - I've heard that standard "el-cheapo" TV antenna poles work just as well as these commercial products, and since they come in 6 or 8 foot lengths they are easier to stow.

Cheers!

-Tim
Title: Re: Generator exhaust
Post by: Len Silva on January 11, 2008, 05:31:27 PM
I once saw an installation where the generator was on a slide but supported on the ground by a flip-up boat trailer jack/wheel.  I thought it very clever as the slide did not have to be as robust.

Len
Title: Re: Generator exhaust
Post by: gus on January 13, 2008, 06:16:14 PM
My Honda EV6010 is made for RVs, it fits into the 4104 AC engine compartment (Behind the AC cond comp) very nicely but may be smaller than yours. It is mounted on a raised 1" square steel tubing skid with the muffler underneath. This skid is held into two channel iron rails held by four bolts to be removed if the skid is pulled out. (In two years this hasn't happened).

The only things to be disconnected if the skid is pulled out are the electrical connectors. The fuel line has a service loop.

It is fully containd in a plywood/insulated box which takes in all cooling air at the side of the bus and exhausts it all out the bottom. My bay has an open bottom so it is ideal if yours is the same.

The exhaust sticks straight out the side through the expanded metal door.  If ever needed I have an extension with a 90 degree elbow at the bottom which sticks straight up above the bus.

If you want photos email me off forum.