Tried to remove the silencer ring from my '04 today with no luck. I left it alone cuz I don't want to put a bunch of nicks on the ring. My 99 was easy because of the turbo position. With the turbo much lower on the '04, I'm having a hard time getting it out. Any tips?

I looked at mine and decided to leave the silencer ring in. Now planning to make a eliminator pipe to replace the baffle tube.

MikeyB

I never did get mine out either.

About the time I started looking for the heavy duty extraction devices and mumbling some choice words, I figured it really didn't want to come out that day.

I'll try again another time.

I removed mine Jack, and yes, it is kinda difficult to reach. I just used a regular screwdriver, looked for the gap in the split ring that holds it on, and pried it out. Now the gap in the split ring was facing up on mine, and that might have made it easier for me. I was supprised how easy it came out though. If the gaps not at the top of yours, try working it around to there, and try again. Good Luck!

Cat Cracker.

Don't feel bad men. I have been a diesel tech for 20 years. And I had several choice words getting mine out.

I finally got mine out, after putting a couple of nicks in the housing. Oh well, it still runs fine :) What a pain!

WARRANTY VOID

:P



I finally got mine out, after putting a couple of nicks in the housing. Oh well, it still runs fine :) What a pain!

How much difference in sound did it make? Also, are their any noticable power losses? I'm just wondering if it is worth the effort, because I really love the big rig turbo sound.

There is no power loss with removal of the ring. The only purpose of the silencer ring is to lower the sound of the turbo, period. Anyways, it's a little bit louder, not much. I used to not be able to hear it at all once I let off the gas, but now I can listen to it spool down. It's the perfect level for me now. :)

It took me longer to remove all the plumbing to get to the ring then it did to get the ring out. I guess I've done it so many times that I have a system.

Ahhhh Jack. ;)
Famous last words.
"I'm not into bombing anymore after the money I put into my last truck."

Welcome back to the Dark Side.
<insert evil laugh here> [laugh]

With all the talk about removing this ring and the air flow
enhancer/divider I took a look at mine yesterday. The ring
and divder look to be air flow enhancements...They may also be there to reduce noise levels but both "look" to be for smoothing the air prior to entering the turbo impeller.

The purpose of the devices go with basic prinipals of aero
dynamics. Both "look" to be to allow a uniform and predictable
flow streams into the impeller. With the way the air must snake around (2) 90 degree bends prior to entering the turbo
I'll bet they help. Even the little "dimples" on all sides of the
"X" device look to be laminar flow features for improved air
flow.

There may be also acoutical benefits for reducing noise levels
Just my 2 cents

It's pretty much been proven that all it does is lower noise.

How did you guys proove it ?...by removing the ring ?
When you remove the ring you have disturbed the designed
air flow path. Disturbed or turbulent air flow is "always"
at higher accoustic levels....clean directed air with a nice
designed air path will "always" have lower accoustical noise
levels.

Removing the ring did not proove it was added to reduce
the impeller noise levels. Its much more complicated.
Air flow and accoustics play hand in hand and change
with elevation/humidity/and pressures. Its true design may
actually benefit both issues...noice levels and air flow.

Look at the front of a jet engine cowling !!!...You think that
shape was strictly designed to reduce noise levels while
traveling on vacation?...Those nice blended surfaces are actually accomplishing a lot more than you think.

All you have to do is call Cummins and ask them. They'll tell you why the ring is there, because only the Dodge application has it. You won't find the ring on other applications for the ISB 5.9. I'm sorry, but I think I'll listen to Cummins this time. If they say it's for lowering noise, then I'll take their word for it. You can tell me whatever you want, but I ran my last truck for 5 years and NEVER noticed anything but increase in turbo noise from removing the ring.

Another purpose of that ring may be to actually reduce incoming air temps...Compressed air heats up (as we all
know)...removing this air shroud may "increase" temps
slightly...Your also forcing the air stream to go over the
void where the ring was..this make more noise as a result.

I'll bet removing the ring does "sound" sweet but I dont
think its only purpose is to reduce the impeller whine.

Jack...nothing personal...I'm not telling you anything.
I'm only giving my opinions on "other" reasons this shroud
may be applied to the impeller inlet...Noise is not the only
reason you would want to improve air flow right before the
air is compressed.

I understand where you're coming from, and that's cool. No big deal. I just know what Cummins has told me, because we've been through this over and over for a number of years, and the answer from Cummins is always the same. That answer is that it's there to reduce the sound coming from the turbo, and nothing else. Based on my years of running with, and without the ring, I would say that their statement is fairly accurate.

I agree with Jack that the ring does no more than muffle the whistling from the turbo which might irritate some female drivers. I for one removed mine the day after I got my truck and I have since removed the baffles from the big black tube. This has made the whistle much louder. My wife even likes the sound too! ;) I let her drive it the other day :o so I could hear what the truck sounds like with the Magnaflow and the turbo whistling. ;D ;D ;D
Gee I wonder if I should tell her that I got the EDGE box.. ???

Naw. She'll figure it out one day.. (Although she didn't notice how easily the truck was flying through the Smokey Mountains on vacation last week....

shhhh
dont tell her
and if she finds out, play dumb
this one always works for me "stupid is as stupid does"

Is the silencer ring just inside the turbo housing (intake side of course)? How do you get the baffles out of the (center section of the intake) tube without destroying the baffles? Does removing the baffles have any effect on sound and/or performance?

Thanks!

It took me longer to remove all the plumbing to get to the ring then it did to get the ring out. I guess I've done it so many times that I have a system.


Can you describe your procedure for removing the ring?

If you want to keep your baffles then get a piece of 5" stainless pipe and put it where the baffle thingie goes. Then if you don't like it down the road you can replace it with no grief. Do a search on silencer ring there are many pics out there showing the procedure.

Thanks Spots! It's already out ;D I'll look into some 5" SS.

These pics were helpful. Here's a link to some if anyone else is looking...

http://www.dieseltruckresource.com/yabbse/index.php?board=20;action=display;threadid=15317;s tart=15

I just used a good (short) #2 driver on the end of the snap ring where the diaganonal cuts slants inward; it popped right out...

Thanks Spots! It's already out ;D I'll look into some 5" SS.

These pics were helpful. Here's a link to some if anyone else is looking...

http://www.dieseltruckresource.com/yabbse/index.php?board=20;action=display;threadid=15317;s tart=15

I just used a good (short) #2 driver on the end of the snap ring where the diaganonal cuts slants inward; it popped right out...


And now that you have voided your warranty.... [eyecrazy] [laugh] :o

I like the whistle with both the ring and baffles out. It really sings pulling hills with the trailer on. ;D

I may be clueless but why go through all that hassle just to make something louder?

I may be clueless but why go through all that hassle just to make something louder?


Hmmmm hassle.... two minutes to remove ring, five minutes to replace tube...Yep seven minutes outa my day is a big hassle. ::)
Different strokes for different folks, dude. ;)

A quick question from a novice here........

Does it in fact void the warrenty by removing the ring?

Generally...No. Warranty coverage could be denied if DC could prove something like this: if you left some debris or metal chunks in the turbo housing when removing the ring (didn't clean it out before putting it back together) and then the Turbo fried.

I did get a little bit of dirt just on the inner lip of the turbo housing (came off the intake tube), but used a shop vac to clean it up. I made certain everything was clean before reassembly.

The fact the Cummins only uses the "silencer" in Dodge applications for sound control proves that it does not make a difference (mechanically), therefore it is not a necessary item.

A quick question from a novice here........

Does it in fact void the warranty by removing the ring?


No I was being sarcastic. Some dealerships will use any excuse to avoid warranty work.

Anyone putting off removing their silencer ring because they think it is too hard/ time consuming- it is not. and it DOES make a noticable difference in the sound of the turbo whistle (for the better [whistle] ) If the gap in the metal "piston ring" looking thing is at the top of the housing like mine was; dont fret. (You're not gonna slide or spin it around; way too tight) Get a small pocket mirror and direct it towards the top inside of the housing, and a trouble light of course. The trickiest part of the whole ordeal is getting accostomed to the fact that everything is in reverse in the mirror. Get a good bite on it, work it out. Pull out silencer. Replace "piston ring", introduce silencer to his new friends in the glove box.

Why replace the piston ring?

Jamie

Yea, I thought about that as soon as I put the hose clamps back on. Oh well, next oil change...

When I first bought my truck and learned of this mod. I read how someone tried to put the Silencer ring and retainer ring back on and it came loose and trashed his turbo!!!

just what I read on one of these threads... something to think about.

Jamie

yeah, I was darn well sure to make sure the retainer was well seated in the groove. It definitely crossed my mind how serious it could be if it were to come loose... like a knife in a garbage disposal. Also, I remember seeing a thread where someone relpaced the middle section of the tube with a piece of strait aluninum tubing. Anyone remember where that was?? Im guessing the baffle-less tube increases airflow, which increases power, but also DEcreases MPG. Correct?