Putting the Quiet in QL
 

So Today I started my project..


I did not take a DB meter level prior to starting. I got a 4X4 2lb/sq ft lead sheet. I lined the side panels and used hi-temp spray adhesive. Did the driveshaft cover and cranked it up.

I'm at 78 db idle via my phone app. I believe I have enough to do either the hood or the firewall w the fuel tank.



Michael

You did what??? How about a picture.

:TTWWP:

Never tried to put quite in anything. Or did you mean quiet?

I fixed it..... that was bugging me too. :biggrin2:

YES PLEASE!! some pics,,

Yes yes, quiet.

I used the best soundproofing in the world. Lead.
1/2 way done.


M

You really think that spray adhesive is going to keep lead sheets on the side panels? :GoodLuck:

Let's see some pictures and let us know how it holds up.

Two-sided tape holds wheel weights on, if cleaned properly. I have no idea of the material he is using tho, without pics. :WWP:

Yeah..... but probably not next to a hot motor. :bigeyes:

Ya good point. If the lead melts, you've overheated it. Kinda like the tabs junkyards put on freeze plugs. :biggrin2:

LOL. Voided warranty? :bigthink:

Why not fix the rattles correctly? There are a list of parts that wear, or become out of adjustment that cause this.

If the lead sheet were covered with metal, I don't see the engine getting so hot to melt the lead. Our machines {non-tractors, but same principal} all have lead in the middle of steel for noise reduction.

I am used to the teeth shaking, ear bleeding, brain scrambling noises my 1250 makes. It helps to forget about a bad day or to get back at the neighbors for letting their dogs bark all night. I get started early too. :biggrin2:

J mechanic,

No need to be rude.

I did not use spray adhesive, but hi temp contact cement. I think it is rated to 185f.

Since the paint does not char, I expect it will hold up fine.

No rattles, just making it quieter than factory. Not for the restoration croud.

The stuff they make magnetic signs with would work no glue needed,they are easy to find for free on the side of trucks and vans at the home center.:biggrin2:

You can say rude if you want to..... but I'm more of a fix the problem kind of guy than I am a re-invent the wheel. Seems like johncub7172's answer makes more sense than putting lead sheets inside the hoods. I dunno..... If you thought the muffler on your car was bad, would you line the inside of the car with foam or.... lead..... or just put a new muffler on? You could have done some simple things with material that cost less than the lead sheets and accomplished the same thing. I just don't understand your approach.... it's not about not being "factory".... it just doesn't make any sense. :bash2:

The lead was $40 and adhesive was free. You really need to look at what frequencies are loud. All the lower freq stuff, the lead is much more effective. Foam, decoupled loaded mass, dynacrap etc.

The P7100 cummins guys have found this makes a 10 db drop 1 ft off the oil pan.

My muffler is fine. currently the mower deck is louder than the tractor.


Might be unconventional-but I tell you it is highly effective in the driver's seat.

M

So are ear plugs.

A metal panel can "drum" under vibration, it's called resonance-same thing what makes a trumpet work. The lead sheets or even a high mass asphalt sheet can stop the drumming, making them quieter. Doesn't really take a full covering either, just a small size pad in the center usually.
New cars have small pads glued everywhere to prevent this type noise. They are big for the boom-boom stereo guys too.
Even if everything was bolted down perfectly, those type pads will dampen some noise.

It seems that no matter how much "fixing" you do on them they still shake, rattle, and roll. That being said, I think this guy has a good idea.

To be honest if they are fixed correctly they do not shake or rattle any more then any other machine... my 1000 was just as quiet if not quieter then both my 127 and 70 and was much more pleasurable to drive. My 1450 isnt much behind them i just have to adress my iso mounts on it and im sure it will be fine also my old 1650 was smooth as silk as well... but i could see where the led would dampen the drin effect on larger panels