Quiet her big *** down! - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 7 (permalink) Old 05-29-2013, 11:10 PM Thread Starter
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Quiet her big *** down!

Have been looking and reading what i could find on how to quiet my truck down. (1999 Dodge 4x4/3500/extcab/laramie/5.9turbo diesel/ dually...

acetone/ synthetic 2stroke oil/ hpx-mod?Is there not a part just for a dodge. She has the magnaflux exhaust. acetone and the 2 stroke oil sound like they might truly help, but.. there has to be something more permanent.... Any help would be greatly appreciated.
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post #2 of 7 (permalink) Old 05-30-2013, 05:43 PM
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It is just the nature of that motor, I ran 2 cylce oil in my 95 and it made a noticeable difference in it.

Give that a shot, I used 1/2 ounce per gallon some use 1 ounce, Im would try one tank with a 1/2 per gallon when you fill it up and add a little to the fuel that is still in the tank, then it easier to keep track of. What i did was buy 2 smaller bottles I thik they were 10 or 12 ounce bottles and I kept a gallon of it in my tool box and I just refilled the small bottle when needed.

I used Walmart brand make sure it is the 2wc3, i think it was Super Tech made for walmart.

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post #3 of 7 (permalink) Old 06-11-2013, 12:29 PM
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Common Rails are much quieter partly because they run more insulation on the engine. The air induction (air cleaner assembly) will make a difference in the engine noise, and the exhaust. After that pull the interior out and and start adding sound deadening.
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post #4 of 7 (permalink) Old 06-25-2013, 06:08 AM
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I guess i could give it a try as well.
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post #5 of 7 (permalink) Old 06-29-2013, 11:38 PM
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Did I say you can tighten up the valve lash just a little and reduce the valve train noise. Try setting the lash at 12 thousands on the intake and 14 thousands on the exhaust. If you want to pickup a little performance set them at 10 thousands both sides, but I feel that may be just a little tight. Stock is 20 thousands both sides.
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post #6 of 7 (permalink) Old 07-04-2013, 03:30 PM
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If you wanted quiet, why didn't you buy a 3rd/4th gen, or a Dmax?

The Common Rail Cummins engines aren't quieter from more insulation. It is because of the multiple fuel injection events, vs one big single shot of fuel. Some engines have up to 5-7 injection events per. Mostly done to meet emissions.

One of the reasons the ISB is so loud, is because of the more advanced pump timing, which is computer controlled.

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post #7 of 7 (permalink) Old 07-04-2013, 09:49 PM
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Quote:
Originally Posted by bmoeller View Post
If you wanted quiet, why didn't you buy a 3rd/4th gen, or a Dmax?

The Common Rail Cummins engines aren't quieter from more insulation. It is because of the multiple fuel injection events, vs one big single shot of fuel. Some engines have up to 5-7 injection events per.
Good point but my 6.7 does have more insulation than my ISB. And that has to have some effect.
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