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How to make a 2nd gen 24V quieter.


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#1 Suprmn

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Posted 06 February 2007 - 09:44 PM

O.K. I am curious if a change in timing or some of the boxes out there will quiet one of these down a bit. I test drove a 98 that I will like to buy, but it is just too noisy in the cab for me. It is the SLT model so it has all of the insulation, but I was curious if there are some simple things that could be done to tone it down a bit?

#2 edgerat

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Posted 06 February 2007 - 09:48 PM

not really, you can spend several hundred dollars on Dynamat to quiet a good bit of the noise in the cab, outside of that you could have the engine balanced and blueprinted and lastly you could run an ENORMOUS injector that spurts so much fuel in the cylinder it quiets it down a bit smile.gif The dynamat would be a good option to start with otherwise I would look at a higher mileage 03

#3 jefff929

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Posted 06 February 2007 - 09:50 PM

running a little BioDiesel or 2stroke oil in your fuel will quiet stuff. biggrin.gif

#4 Ol Blue

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Posted 06 February 2007 - 10:16 PM

Observations from before and after and confirmed when standing next to other 2nd 24Vs with both theirs and mine running.

The timing control from SMARTY has reduced idle noise to a large degree.

F1 injectors have quieted the entire rpm range.


From inside the cab, the following has seemed to help:

Insulate the shifter boot with regular fiberglass insulation (4x4 shifter included:

Insulate the space between the fire wall and front fenders, especially helpful in reducing open air filter noise. hit.gif

Close off the outside chambers (1 each side) under the windshield wiper cowl from the center section.

Spray undercoat under the cab AND bed.

The next step for me will be to Dynamat the interior, but at the low level of noise in the cab now, the cost is a little high IMHO.


#5 chief jack

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Posted 06 February 2007 - 10:31 PM

Funny you ask.... Most guys want their truck to be LOUDER! 783.gif 783.gif

#6 Vaughn MacKenzie

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Posted 07 February 2007 - 12:34 AM

Nice post Rob. I have heard some 24 valves nearly as quiet as a 12-valve with stock timing.

Suprmn one thing that helped a skosh on my '01 was to put a couple layers of Dynamat on the oil pan. I covered the large flat surface and left the lower portion uncovered since the oil sump will dampen the noise there. Doing the pan seemed to take some of the edge off the sharp staccato 24 valves make.

You oughta consider a '98 12-valve. . . more cab insulation than the '97-older trucks, combined with a quieter engine. My '98 is much quieter to ride in than my '01 was, which was an HO. . . the loudest 24V.

Vaughn

#7 00' Quad Cab

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Posted 07 February 2007 - 12:55 AM

My solution to this dilemma was 700 watts of power 783.gif 049.gif

#8 MSquare

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Posted 07 February 2007 - 12:59 AM

QUOTE(chief jack @ Feb 6 2007, 08:31 PM)  

Funny you ask.... Most guys want their truck to be LOUDER! 783.gif 783.gif



To loud???? Whats happening to this world???

#9 Sea Bass

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Posted 07 February 2007 - 01:29 AM

I don't know if it was just me but Dave's (fishn2deep) truck seemed way queiter than mine. I don't know if it's the cam, injectors, twins, or what but certainly more quiet.

Doug

#10 Fishin2Deep4U

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Posted 07 February 2007 - 02:45 AM

QUOTE(Sea Bass @ Feb 6 2007, 11:29 PM)  

I don't know if it was just me but Dave's (fishn2deep) truck seemed way queiter than mine. I don't know if it's the cam, injectors, twins, or what but certainly more quiet.

Doug


783.gif Just keep adding parts. It's not quieter, just more distracting.... 049.gif

Dave

#11 Cummin

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Posted 07 February 2007 - 07:37 AM

QUOTE(Suprmn @ Feb 6 2007, 08:44 PM)  

O.K. I am curious if a change in timing or some of the boxes out there will quiet one of these down a bit. I test drove a 98 that I will like to buy, but it is just too noisy in the cab for me. It is the SLT model so it has all of the insulation, but I was curious if there are some simple things that could be done to tone it down a bit?


I have the hood liner, the valve cover blanket and the oil pan blanket from these guys ATP WRAP and it did quiet down the interior noise quite a bit, I can now have a normal conversation with passengers without having to raise my voice. Although I don't think it really did much for exterior noise.

#12 C Paul Go

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Posted 07 February 2007 - 09:10 AM

QUOTE(Cummin @ Feb 7 2007, 05:37 AM)  

I have the hood liner, the valve cover blanket and the oil pan blanket from these guys ATP WRAP and it did quiet down the interior noise quite a bit, I can now have a normal conversation with passengers without having to raise my voice. Although I don't think it really did much for exterior noise.



This would be what I would do if I wanted quite, but I would do twins first! 783.gif

The twins will quite the exhaust side. Then the blankets will help with the engine noise. biggrin.gif

#13 Suprmn

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Posted 07 February 2007 - 11:39 AM

Thanks for the tips. I want a 12V but this 98 is sweet and set up the way I want it. On the test drive it started reverberating my ear drums. I love the cummins sound, but dang!

#14 Thumpmeister

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Posted 07 February 2007 - 01:58 PM

Here, I saw this a number of years ago, and kept the link cause I thought it was a cool idea. I haven't heard anything about it, though....

http://www.atpwrap.com/dodge_ram.htm

Well crap, looks like someone bet me to the punch (on edit)...

Edited by Thumpmeister, 07 February 2007 - 02:00 PM.


#15 Vaughn MacKenzie

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Posted 07 February 2007 - 08:16 PM

QUOTE(C Paul Go @ Feb 7 2007, 09:10 AM)  

This would be what I would do if I wanted quite, but I would do twins first! 783.gif

The twins will quite the exhaust side. . . biggrin.gif


. . . and you can't quite quit being quiet about twins tongue.gif

#16 Ron R

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Posted 07 February 2007 - 09:18 PM

sell it and buy a vw.

#17 Mad Bomber

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Posted 07 February 2007 - 10:38 PM

Changing the valve lash and it can become quiter.

#18 Diesel Freak

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Posted 08 February 2007 - 10:11 AM

QUOTE(Suprmn @ Feb 6 2007, 07:44 PM)  

O.K. I am curious if a change in timing or some of the boxes out there will quiet one of these down a bit. I test drove a 98 that I will like to buy, but it is just too noisy in the cab for me. It is the SLT model so it has all of the insulation, but I was curious if there are some simple things that could be done to tone it down a bit?


Twins and really big injectors quiet them down very well!!


#19 shortfieldbreak

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Posted 08 February 2007 - 09:33 PM

QUOTE(Ron R @ Feb 7 2007, 07:18 PM)  

sell it and buy a vw.

laugh.gif I was going to say turn off the key. 783.gif 783.gif

-SFB

#20 john1

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Posted 11 February 2007 - 11:00 AM

I add 1 gt. of 2 cycle oil per tank.Also what kind of exhaust does it have ?Put on a Quieter muffler.
Is the silencer ring still on? Check that.
Put on some added insulation like others suggested.
Soon these little fixes will do the job.





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