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Old 12-20-2016, 04:38 PM   #1
Skoolie
 
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Quieting the Ford 7.3 Powerstroke

Mine is in a 1999 Ford E450 airporter style shuttle bus.
I want to quiet the noise from the engine.
That means also quieting the noise thru the hood since the noise travels thru the hood and the windshield to the interior.

I can use google like everyone else, but am esp interested in what you have done to quiet the 7.3 engine in your bus?

If you are stating opinion without experience (which is welcome) please state so in your reply.
Thanks for the help
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Old 12-20-2016, 05:49 PM   #2
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Join Date: Oct 2009
Location: Moodus, Ct.
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Year: 1996
Coachwork: Champion
Chassis: Ford e-450
Engine: 7.3 Powerstroke
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Well-I got a 96 e-450 shuttle bus-so I guess I count as having experience. Theres only so much you can do-you ARE sitting on top of the motor. I have indoor/outdoor carpet on any flat surface I could on the inside- I'm sure that helped out a bunch. I don't have anything on the dog house except the stock padding inside.
A product that I can say works good is Dynamat. Its some form of rubber with aluminum backing. I've used it in a few cars. Its expensive-there may be cheaper stuff out there.
Actually, I don't consider it that noisy at hiway speed. It has a nice goin' down the road tone to it. You get as much wind + road noise as engine noise. But my ride before that for many years was 85 GMC cube van with a 350-with headers-so quiet might be relative.
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Old 12-20-2016, 06:47 PM   #3
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Year: 1991
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Chassis: International 3800
Engine: DTA360 / MT643
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I havent used it on my T-444e (7.3) yet, however I can say that hushmat DOES work for a DT-360 so i can only assume it will help with the 7.3

also make sure you have any Injector Cackle TSB's performed.. much of the 7.3 noise is injector cackle and there are fixes to quiet it down.. injector cackle is harmless just annoying..

the Split-shot injectors in the later models.. (99 up?) are more annoying than the earlier versions of the 7.3

the T-444E is even noisier than the ford 7.3 due to using a mechanical Fuel Pump..

if your thermostat is bad and your engine doesnt warm up to operating temp it is also extremely noisy.. (not just when its cold..)

-Christopher
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Old 12-20-2016, 08:59 PM   #4
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Location: Southern California
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Year: 2002
Chassis: e450 super duty
Engine: 7.3l ford powerstroke
You can try useing dulpi-color rubberized undercoat spray in between doghouse & insulation, or on the inside around the doghouse, Or the under side of the hood i used it inside. works good just alittle pricey. you can get it at Auotzone, napa, pepboys etc..its always in stock. you can try getting rid of the dead-head fuel issue hear that works with shutin it up a bit. Cheers.!
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Old 12-20-2016, 09:36 PM   #5
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Year: 1999
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I dont have your engine or chassis, but I do have a DT-466. If you think the T-444 is loud, wait until you are sitting on a DT.

A trick I used to great effect is the rubber mat designed for horse trailers from Tractor Supply. This stuff is almost an inch thick and comes in 4'x6' sheets. Its HEAVY, and works a treat. Its better than dynamat for these diesels. Very dense. You'll need to monkey something to attach it to your engine cover, but its worth the effort. Also cuts down on heat transfer into the drivers compartment.
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Old 12-20-2016, 10:04 PM   #6
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Pshaww...if you want to hear loud?...try a Detroit 6V53 "Screamer". Just maybe the loudest engine ever created! Same engine that was used in the Viet Nam "Swift" boats (the Brown Water navy). The joke was that the noise from the Detroits did more harm to the Viet Cong than the twin 50's ever did.

PS...I had that engine in a 40' BB and can testify to the noise level.
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Old 12-20-2016, 11:13 PM   #7
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Quote:
Originally Posted by Tango View Post
Pshaww...if you want to hear loud?...try a Detroit 6V53 "Screamer". Just maybe the loudest engine ever created! Same engine that was used in the Viet Nam "Swift" boats (the Brown Water navy). The joke was that the noise from the Detroits did more harm to the Viet Cong than the twin 50's ever did.

PS...I had that engine in a 40' BB and can testify to the noise level.
Man you make me miss my Detroit......
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Old 12-21-2016, 12:46 AM   #8
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some good ideas here
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Old 12-21-2016, 05:40 AM   #9
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Location: West of the Mississippi
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Year: 1990
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Engine: Ford 460/7.5l
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My shuttle bus has a Ford 460...pretty quiet ride.

My '84 Ford F250 6.9l IDI w/ Banks Turbo as a muffler is music to my ears and sometimes turn the radio off and just drive. Surprising how quiet it can be rolling down the highway.
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Old 12-21-2016, 06:20 AM   #10
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Year: 1996
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Chassis: Ford e-450
Engine: 7.3 Powerstroke
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Quote:
Originally Posted by GreyCoyote View Post
I dont have your engine or chassis, but I do have a DT-466. If you think the T-444 is loud, wait until you are sitting on a DT.

A trick I used to great effect is the rubber mat designed for horse trailers from Tractor Supply. This stuff is almost an inch thick and comes in 4'x6' sheets. Its HEAVY, and works a treat. Its better than dynamat for these diesels. Very dense. You'll need to monkey something to attach it to your engine cover, but its worth the effort. Also cuts down on heat transfer into the drivers compartment.
I used that stuff on my steps after I rebuilt them. Good stuff. I could see using it as a carpet underlay.
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