Tool truck build

[MuntCuffin]

any reason routing small engine exhaust from a generator and an air compressor into the exhaust of the truck, prior to muffler, would be an issue?
Trying to make the truck as quiet as possible due to a lot of work being in residential settings.

 

[tsomctl]

Don't know, but go get a muffler from a small car and pipe them into that. If it's a modern diesel, I'd be terrified of anything that could contaminate the SCR.

Significant amount of engine noise comes from the valve cover, oil pan, and exhaust manifold. That's one of the reasons modern cars have a stupid plastic vanity cover on top of the engine. Here's a video of a small generator that's designed to be quiet where they built a box with insulation around it: You can see all the foam.

 

[MuntCuffin]

Its a 6.2 gasser.

Generator is a 15kw 20 hp gas. Not mounted covered like that, its in the mobile cage thing. It's going in a utility bed with a metal cover over the bed that retracts over the back half. Was going to mount genny under front half and route exhaust through the floor of the bed. If cage was too tall, I'd dismount genny from the cage and mount directly to floor of bed and find mounting for fuel tank and make fuel lines longer. Electric start, so I'd likely elongate what wires I need and mount the key switch in a tool box. It would be a pain in the dick to do any kind of service/oil level check to the genny engine, bit im ok with that.
All the generator is going to be doing is running welders/plasma cutters and any corded power tools I'd use and aux lighting when the work site lighting on the truck isn't enough.
Exhaust would y in after cat, before muffler.

 

[tracyb]

you could, and it shouldn't cause a problem on a gasser, but it could.

really, your not goign to gain much more than just routing the exhaust down under the truck.


think about all the air compressor threads where building an insulated closet is about the same as muffling the intake. the exhaust gets blame for the noise, but its a small part. and going into the trucks system isn't worth the effort.

if you want quiet, you need to invest in another generator. or proper sound deadining. fwiw, i dont think the modern weld/gens are worth the price if my 325efi that is supposed to be one of the quiet ones, goes down... i'm probably going back to running a Commercial Mobile Quiet Deisel. the harbor freight invertor gens amazing for what they are too, and they can be paralleled for more power.

a pto gen is going to be the best quiet option.


the most quiet setup i have ever had was the tb325efi inside of an e350. back doors, and at least one front window or door was alwyas open. made good airflow and never smelled of fuel or exhaust. the exhaust was stock and just went out the back. i did one temp exhaust re route, but it didn't help any.

 

[Steve300xcw]

any reason routing small engine exhaust from a generator and an air compressor into the exhaust of the truck, prior to muffler, would be an issue?
Trying to make the truck as quiet as possible due to a lot of work being in residential settings.

We stuck a silencer off my ktm onto the air compressor in our service truck after the exhaust rotted off. It didnt make it quieter, but it sure sounded cool. Probly not the answer you are looking for though

 

[Kunker]

tried throwing a scrap car exhaust on my home gen set in a longer power outage - did dick all compared to just leaning a sheet of plywood against the dang thing in terms of noise. 95% of the noise came from everything but the exhaust.

 

[MuntCuffin]

tried throwing a scrap car exhaust on my home gen set in a longer power outage - did dick all compared to just leaning a sheet of plywood against the dang thing in terms of noise. 95% of the noise came from everything but the exhaust.

Yeahhh. Just picked up the air compressor this weekend. Maybe 5% of the noise it makes is engine related. And its loud as fuck.

Oh well. Itll make people look. Free publicity and advertising.

 

[[486]]

any reason routing small engine exhaust from a generator and an air compressor into the exhaust of the truck, prior to muffler, would be an issue?
Trying to make the truck as quiet as possible due to a lot of work being in residential settings.

people are hot on talking about valve overlap blowing exhaust through everything
dunno if it is really a problem

I stuck a car muffler on an onan cck, and even that thing was making more noise from the cylinder heads and such than the exhaust
quieter than open pipes for sure, but nowhere near quiet enough for the effort put in

stick a motorcycle muffler on it and run it inside the service body, tailpipe just poked through the floor but not hooked up to anything
for air, sacrifice your a/c compressor and run an oiler on its intake

 

[posford]

Honda 2000 inverter for most shit, fire up the big one only when necessary? Not sure it would work out if you weld/cut a lot