Unusual Performance Stuff

[betterthanstock]

Hi guys, I'm new to the forum. I've made some unusual mods to my 03, and my friends have copied some of them unto their trucks, so I decided to start selling some of them on my new web site rokktech.com .

Check out my truck's profile, and let me know if you'd like to know more.

 

[supersonic]

Cool website. welcome to TDR.

 

[Matt400]

Hrmm, ok gotta few questions.



On the timing mod. . how much does it change and can you make different increments of advance. That is can it be set to 12 degrees total, 10 and 8 etc?



Also, on the muffler the last paragraph is confusing-

Due to pipe resonance in an exhaust system, this muffler should be installed as far back as possible, and should be preceded by either a catalytic converter, or a "noisy" high performance muffler, such as an Aeroturbine, or an absorption muffler, (fiberglass or rock wool) such as a Dynaflow

When you say "this muffler" do you mean yours or the style you are comparing it to?



Thanks

 

[betterthanstock]

The timing can be set anywhere from stock to about +2 deg. Any further, and the engine knocks and stumbles a bit at lower rpm. I have only tested it on mine (2003) for about 30k miles, and a friends (also an 03) for about the same mileage.

My muffler was designed to complement the "too loud IMHO airoturbine" (2003 do not have catalysts), and one of my friends has it on an 2003 also, but with a dynafloww. We are both very happy.

 

[BobD]

What kind of increase in fuel milage have yoiu noticed??

Is cummins p/n 3408529 available at a Dodge dealer or only from cummins???

 

[betterthanstock]

the sensor is available from cummins for 25$ any guess on how much at dodge? mileage incerase is about . 5 to 1 mpg depending on cetane, air temperature, and your right foot

 

[Matt400]

The timing can be set anywhere from stock to about +2 deg. Any further, and the engine knocks and stumbles a bit at lower rpm.

Interesting, I wonder if thats due to- not also changing the cam timing along with it.

My muffler was designed to complement the "too loud IMHO aeroturbine"

Oh. . I see, so its not the super quiet thing all on its own then.

 

[betterthanstock]

The history behind it's design is: I bought aroturbine, installed aroturbine in stock muffler position, then drove to a friendd's house that had a dB meter. It was about 85 dBA @ 2300 rpm inside the cab. Needless to say I was out of $300. 00, and was contemplating putting the stock muffler back on.



The next day I went and purchased donaldsn M90544?? forgot the exact part number, and placed it before aerotb. On my way to the muffler shop it was so loud, that a trucker gave me the air horn salute as I drove past his cab, and I was lighfooted. On went the donaldsn, and per the recommendation of aerotb, the aerotb went in as a tailpiece (huge tip, the guys at the muffler shop were making funny comments).

It was still loud, but tolerable, about 75 dBA (I had now purchased my own meter).

At first I thought that the Donaldsn has only 1 inch restriction, which is less than the airfilter which has about 3-5 or more, so I thought I had it made. Then I discovered it has 1 inch Hg (mercury) or 0. 5 PSI at normal cruising, and 2 inches at full throttle (1 PSI) That's about half of what the stock muffler has, not much better. So I wanted one that will have about 10% of stock, and started designing my own. Long story short, after weeks of research, i made a prototype, and about 2 weeks later had tuned it to where I like it. At first I had the aerotb used as one BIG exhaust tip, but it was noisy at some frequencies, until I switched it the other way around, and instantly found the sound and loudness and negligible back pressure I had sought.

 

[betterthanstock]

One more thought, the Silent Might muffler is not totally, silent, but compared to any other high performance muffler, it is.

Bottom line: if you own a 2003 and early 2004, you need the following mods:

-4 inch downpipe (don't bother to use a 4 inch turbo elbow, you won't feel it, but you will feel the downpipe)

-one noisy high performance muffler of your choice(not a donaldson or nelson, they are too restrictive)

-a piece of 4 inch aluminized pipe,

-one Silent Might muffler

-a resonated tip to finish it off (optional)



It may be cheaper to purchase a complete exhaust with noisy muffler from a number of internet sources for as little as $300-350, then just add the Silent might muffler after (not before) the other muffler. (Some of you have done just that and then added a donaldson just to make it bearable noise-wise, but you have not gained much. )



For a 2004. 5 and 2005-on, you need:

-one Silent Might muffler

-one resonated tip (optional)

 

[betterthanstock]

Interesting, I wonder if thats due to- not also changing the cam timing along with it.

I've tried that, and it does not matter on the 03, don't know about the 05's. No, the reason is that cummins has to retard timing from optimum by about 1-2 degrees to meet emmisiions (spelling on purpose)... I don't want to discuss the details, but the more efficiently the engine runs, the more power and better mileage, lower exhaust temp. , and higher internal combustion temperature, which produces less carbmonoxide, carbdioxide, andparticulates but more nitrousoxides. and some body decided that's the laww...

 

[nickleinonen]

Hmmmm, with all that computer jnk on the late trucks I would think you would get better milage than that

don't thank computers for that, thank emissions regulations

 

[mysteryman]

It has always amazed me how politicians think that they know more than we engineers! One thing I have learned in life is that I can never compete with stupidity... ... . With truly stupid people I have come to find that no amount of facts will ever change their minds on anything. .

I've tried that, and it does not matter on the 03, don't know about the 05's. No, the reason is that cummins has to retard timing from optimum by about 1-2 degrees to meet emmisiions (spelling on purpose)... I don't want to discuss the details, but the more efficiently the engine runs, the more power and better mileage, lower exhaust temp. , and higher internal combustion temperature, which produces less carbmonoxide, carbdioxide, andparticulates but more nitrousoxides. and some body decided that's the laww...

 

[jwilliams3]

NITROUSOXIDES? :-laf

When did my engine start making Nitrous Oxide?

 

[betterthanstock]

NITROUSOXIDES? :-laf

When did my engine start making Nitrous Oxide?

alright, nitric oxides.

 

[betterthanstock]

alright, nitric oxides.

this is from wikipedia.org:



Nitric oxide also plays a role in erection of the penis, and explains the mechanism of sildenafil (Viagra®). The effects of the recreational drugs known as poppers are also thought to be due to nitric oxide



Production of NO also plays a role in development and maintenance of erection by stimulating PDE5-related intracellular cGMP in the smooth muscle cells surrounding the blood vessels supplying the corpus cavernosum; through relaxation of these muscles, more blood can flow in.



The discovery of the biological functions of nitric oxide in the 1980s came as a complete surprise and caused quite a stir. Nitric oxide was named "Molecule of the Year" in 1992 by the journal Science, a Nitric Oxide Society was founded, and a scientific journal devoted entirely to nitric oxide was created. The Nobel Prize in Physiology or Medicine in 1998 was awarded to Ferid Murad, Robert F. Furchgott, and Louis Ignarro for the discovery of the signalling properties of nitric oxide. It is estimated that yearly about 3,000 scientific articles about the biological roles of nitric oxide are published

 

[jwilliams3]

What your going after is nitrogen oxides.



Have you lost your mind, what the hell are you talking about?

 

[betterthanstock]

What your going after is nitrogen oxides.



Have you lost your mind, what the hell are you talking about?

Have a sense of humor :-laf





quote:



Nitric oxide

From Wikipedia, the free encyclopedia.

The chemical compound nitric oxide is a gas with chemical formula NO. It is an important signaling molecule in the body of mammals including humans, one of the few gaseous signaling molecules known. It is also a toxic air pollutant produced by automobile engines and power plants.



Nitric oxide (NO) should not be confused with nitrous oxide (N2O) or with nitrogen dioxide (NO2).



The nitric oxide molecule is a free radical which makes it very reactive and unstable. In air, it quickly reacts with oxygen to form the poisonous nitrogen dioxide.



A major natural source is lightning. Human activity has drastically increased the production of nitric oxide in combustion chambers. One purpose of catalytic converters in cars is to partially reverse this reaction.

(scrolling down further



quote:

Nitric oxide also plays a role in erection of the penis, and explains the mechanism of sildenafil (Viagra®). The effects of the recreational drugs known as poppers are also thought to be due to nitric oxide.

end quote

 

[OHale]

The timing can be set anywhere from stock to about +2 deg. Any further, and the engine knocks and stumbles a bit at lower rpm. I have only tested it on mine (2003) for about 30k miles, and a friends (also an 03) for about the same mileage. Any one willing to be first on an 05?

My muffler was designed to complement the "too loud IMHO aeroturbine" (2003 do not have catalysts), and one of my friends has it on an 2003 also, but with a dynaflow(?)We are both very happy. I also have it on an Excursion, but that's a different subject.

BetterThanStock,



Welcome to the board. Sharp website you have there. I have an '04. 5 which has the extra injection event to meet 2004 50 state emissions. From what I've read it seems to be at a mileage cost.



How do you think your timing mod would effect the mileage on an 04. 5? I've always had plenty of power for my purposes but would like better mileage and a cooler/more efficient engine.



Your muffler is very interesting as well. If you could put a sound clip on your website you might sell a few more, starting with ME.



Good luck with your business.

 

[PHeadings]

So you barrowed your friends meter to test the arro @ 85Db inside the cab and you measured the Don @ 75DB. I know you bought your own meter, but to keep the test fair did you measure the might inside the cab with your friends meter?

 

[Matt400]

Have a sense of humor :-laf

Oh. . I am LMAO, I think you been huffin that nitric stuff vs buying the bottled thing.