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Anyone used this? My 5.9 cummins will rattle your brains out on longer drives. I have a 1/2 liner on the firewall in the engine bay and that did make a difference but i feel like the hood is a giant echo chamber.
Take it off and try it out to test your theory. If it's enough better, get an old used up hood, cut and trim the middle out leaving the sides, like the Monkey Mobile was done, and use it. Call it a "Bikini Hood". Use snaps to hold a weather "engine hole tonneau for when needed. Make it out of heavy duty racy black material. Store your hood for future use.
Take it off and try it out to test your theory. If it's enough better, get an old used up hood, cut and trim the middle out leaving the sides, like the Monkey Mobile was done, and use it. Call it a "Bikini Hood". Use snaps to hold a weather "engine hole tonneau for when needed. Make it out of heavy duty racy black material. Store your hood for future use.
At that point ill have a hater pipe come up through the hood off the turbo haha
At that point ill have a hater pipe come up through the hood off the turbo haha
Is that what they are called?
One local kid runs a black painted 15 gallon grease drum bolted to his bed floor behind the cab, exhaust comes from below through a big hole. He "rolls coal", or so he called it. It's a Dodge ... so ... there is that. He gets ticketed occasionally, muffler or lack of. It was his Dad's truck, but he was showing his buddies how cool it was, running a gravel road near the farm, no air cleaner so he could hear the turbo. Those turbos don't like eating gravel .... his Dad give the truck to him with no repairs. Took him a few afternoons after school working at Waffle House to earn enough to fix that. Dad bought himself a new truck, would not let him drive it either.
Good luck taming the noise of your Cummins. I would think with you have in mind would help quiet things down.
Regarding the young nitwit with the straight pipe, rolling coal. We have those idiots here as well, but almost $6.00 a Gallon fuel seems to have slowed it down some.
Not sure that the future of modified diesel engines is, as the EPA have been hitting shops here that were modifying trucks, with heavy fines.
I wonder how long it will be before the EPA goes to checking trucks.
They are already checking trucks indirectly. I work for ford and they put out an emissions recall that requires a calibration be done. Even in smog exempt counties the recall has to be complete to get registration. Well guess what! You can’t do the recall on a truck that’s been modified, deleted, or tuned….. they are getting clever. And there isn’t a way to cheat the system yet.
Wasn't all that noise a reason you swapped? You could have swapped any number of engines in. just asking.
well my 428 got 6mpg. The Cummins gets me almost 20 on 37s. So no, but it’s a drone/vibration cab noise not exhaust. My exhaust is pretty quiet for a Cummins.
My 99 Dodge 24valve has a liner on the underside of the hood. So I would say adding one to your Ford hood might help a little, I do not think it will make it worse. You can do a double lining. 1st layer idea below, followed by the other 2 pics. Other wise turn up the radio.
My 99 Dodge 24valve has a liner on the underside of the hood. So I would say adding one to your Ford hood might help a little, I do not think it will make it worse. You can do a double lining. 1st layer idea below. Other wise turn up the radio.
Before I add an acoustic liner I added some of this for the vibration and actually is a noticeable difference.
I was gonna say I didn't think under hood insulation would make a huge difference in the cab, but i guess it does.
12v's gonna rattle. My 95 dodge just had a 4" straight pipe and BHAF, even with all kinds of factory sound deadening it was still loud AF going down the highway. I don't think I ever had the radio below half volume. I've seen guys use that acoustic pad on the oil pan, tappet cover and valve covers to kill some drone. One guy laid a thick piece of fiberglass bat over the whole engine. Do you still have the original tappet insulation? Mine was soaked in oil and falling apart, so i took it off and it was noticeably louder. Have you done the inside of the cab with that padding yet?
I was gonna say I didn't think under hood insulation would make a huge difference in the cab, but i guess it does.
12v's gonna rattle. My 95 dodge just had a 4" straight pipe and BHAF, even with all kinds of factory sound deadening it was still loud AF going down the highway. I don't think I ever had the radio below half volume. I've seen guys use that acoustic pad on the oil pan, tappet cover and valve covers to kill some drone. One guy laid a thick piece of fiberglass bat over the whole engine. Do you still have the original tappet insulation? Mine was soaked in oil and falling apart, so i took it off and it was noticeably louder. Have you done the inside of the cab with that padding yet?
same deal here with the tappet cover. Oil soaked so I tossed it. Def got louder. Haven’t finished padding the cab yet. Considering putting a strip of that dense sound absorber on the oil pan.
I don't know what GM uses on the latest examples of diesels. But had a chevy fueling up an island away at the mart. I thought it was off but it wasn't. Driver got in and pulled away. The GM gas trucks are spooky quiet also. Maybe something to do with the direct injection.
I'd be tempted to inject expanding foam in a can into the big void that runs from where the hinges bolt to the hood all the way to the front. Really, why not do it to the entire void between the inner hood structure & outer hood. It would be messy, use the low expanding foam & lots of duct tape to seal seams & holes. Then do the underhood insulation.
If the back side of the inner fenders & fenders are clean, I'd stick a layer or two of Dynamat or a similar product to them as well. Or use one of the spray sound deadeners like Lizard skin.
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Store your hood for future use.
He gets ticketed occasionally, muffler or lack of. It was his Dad's truck, but he was showing his buddies how cool it was, running a gravel road near the farm, no air cleaner so he could hear the turbo. Those turbos don't like eating gravel .... his Dad give the truck to him with no repairs. Took him a few afternoons after school working at Waffle House to earn enough to fix that. Dad bought himself a new truck, would not let him drive it either.
