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ALTF4
Dodge Dakota
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7/21/2004
00:32:18
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 Subject: 2004 4.7 exhaust suggestion
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ok got the new Dak..love it. Sound cool goes fast..looks great(other that the 2 1/4 inch scratches on the hood from the dealer detailer, to be fixup on thursday). I hate it when I find a scratch the day I sign the papers..the damn thing has 50km on it.
I'm wonder what kind of exhaust to get? I'm really new to this whole exhaust thingy.
If someone could explain what a catback system is? and what kinda or model I would need?
I want the nice throaty sound when I hit the gas but I'd like to hear the stereo and my wife while I'm on the highway.
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Richard
Dodge Dakota
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7/21/2004
00:51:29
|  RE: 2004 4.7 exhaust suggestion
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I was fortunate enough to be able to hear both the Flow Master and Extreme Flow exhaust on my 02 Quad Cab 4X4. Hands down the Extreme Flow sounded better, built heavier, better warranty. Don't take my word, look em up. I now run them on my other 2 trucks as well. Die hard Flow Master converted for life. LOL. Good luck. Didn't do much with any other part of the system, so I can't recommend anything beyond that. Would like to install an after market Cat soon. Same brand.
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daffydak
GenIII
7/21/2004
01:16:18
| RE: 2004 4.7 exhaust suggestion
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I currently have a dynomax super turbo (just the muffler) and its WAY too quiet for me. However, it fits the bill for the sound you want... it makes a little noise when you mash it (mostly around 2k rpms) it gets quieter as the engine revs higher... you can't hear it at all on the highway.
I’m thinking about calling Midas, and getting the pricing on a raven system for my dak! They have a Lifetime warranty! Can’t beat that :-)
Dan
MOPAR=More Power!!
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craig2xer
Dodge Dakota
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7/21/2004
10:55:25
| RE: 2004 4.7 exhaust suggestion
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I've got a mustang 5.0L w/ dual flowmasters, and it gives me a serious headache on the highway. I wanted something different for my dodge 4.7L. Deep, mellow, and clean - w/o the head-crushing drone or slop on deceleration of my flowmasters. Don't get me wrong - my mustang sounds great - just don't go on long trips, and completely forget about listening to the radio unless you are just idling around town. Originally wanted the dynomax for my dodge, but opted for the magnaflow because it was much cheaper. Single-in/single-out, and left all the stock pipe. I think I paid like $130 total - dirt cheap. It sounds great - just what I had in mind - very clean sounding, mellow, deep, without all the harshness of the flowmaster. Wished I had them on my ponycar. Oh - got a lifetime warranty w/ it too.
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thrush
Dodge Dakota
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7/21/2004
12:57:04
| RE: 2004 4.7 exhaust suggestion
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I put a Thrush 28" long 2.5" inlet/outlet on my 2004 4.7 RC. No welding, it was a simple unclamp old, clamp on new job. Sounds great and diy cost ~$25. Makes it sound bad a$$ at low speeds and no highway resonances in 5th gear.
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Opie
Dodge Dakota
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7/21/2004
19:27:13
| RE: 2004 4.7 exhaust suggestion
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To answer ALTF4's question, a "Cat Back" is where you remove the components of the exhaust (pipes, muffler, tips) after the catalitic converter and replace them with different ones.
Some people just replace the muffler for better flow/sound. This is done a few different ways. One way the muffler exits with two pipes and they are routed out the side or back of the truck. Another way has the muffler with only one exit.
Another route to take is to split the pipe after the catalitic converter into a "Y" so that there are two parallel pipes running under the truck. A muffler (single in, single out) is attached to each of these pipes and is routed out the back or side of the truck. This has higher flow and is said to sound a little better; but decrease low-end torque.
It is possible to get 2 mufflers with this set up that have dual outputs... so you have 4 pipes coming out the back... but we can leave that to Corvettes and Cadallacs.
A "Straight pipe" eliminates all emissions and sound restrictions and is not street legal on our trucks. It is a pipe attached to the headers and goes straight out of the back of the truck.
The last set-up is what is known as a "true dual" exhaust. At the collector on each of the headers, a catalitic converter is put in line with O2 sensors before and after each cat. There are 2 pipes running parallel all the way to 2 mufflers and out the back or side. This can easily be done on the 4.7L because the cats are already set up in place, but I don't know about any other models. This should be done if you plan on some serious mods (SC, Turbo, NOs, TB, Cams, etc.). GS Motorsports sells a good setup.
There is a different sound for every muffler setup out there (single exit, dual exit, true dual, "Y" after the cat, etc.), so ask around and get some good "sound" examples before you go with one or the other.
p.s. search this site for examples, pictures, etc. There are hundreds of them.
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ALTF4
Dodge Dakota
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7/21/2004
22:23:36
| RE: 2004 4.7 exhaust suggestion
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So I had now Idea there where this many options..or how much $$$$ this is gonna cost. BUt I got lucky a guy I have done some work for, his brother in-law has a muffler shop.
He suggested a magna flow with dual out(1 pipe on each side) I guessing it would sound cool? But I don't to hurt my power?
SO in the perfect world I'd like it to sound cool..not stupid cool but cool and increase my power and mileage..am I asking to much?
Hell I'v only had this thing 2 days and I'm looking for more..this thing rocks now! what was I thinking?
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jasonsdakota
Dodge Dakota
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7/22/2004
01:44:17
| RE: 2004 4.7 exhaust suggestion
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flowmaster delta 50 series is what i'm about to try on my 4.7. delta 40 is the best seller but 50 is quieter. just dont get 50 suv there is the reg 50 series. same performance as 40 series per flowmaster website. check it out on ebay dirt cheap. 2.5in 2.5 out fit's like 30 different types of vehicles just make sure you get that size. want more than a muffler. get a 3" catback. lose some torque maybe though. read opies post again. it's dead nuts accurate
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Opie
Dodge Dakota
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7/22/2004
09:44:02
| RE: 2004 4.7 exhaust suggestion
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"Dead nuts accurate"
thanks.
I didn't address pipe size in my rant because that should stay constant at 2.5' all the way on our Daks. Leave the 3"+ pipes to the diesels. In the end, there really isn't that much hot air coming out of the pipes to warrant 3's or bigger.
I also didn't address the idea of just sticking one of those tips on the end of the system that looks like 2 pipes are coming out. This is one of the cheapest and most non-performance mod you can do, but may look ok if you are short on cash.
Oh, and for the love of God, PLEASE DO NOT put one of those six-inch fart-masters on your truck. They are NOT cool, and people will shoot at you in order to remove some stupidity from the gene pool.
I am still laughing at "dead nuts."
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daffydak
GenIII
7/22/2004
09:59:39
|  RE: 2004 4.7 exhaust suggestion
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Ooohhh speaking of fart can mufflers (kind of off topic, I apologize) the other day, I was at my local McDonalds and this ford ranger (mid 90s) came flying into the parking lot. It sounded HORRIBLE! He had one of those import fart mufflers for the end of your exhaust (not what you would see or WANT on a truck) he revs it up about 2-3 times before he shuts it down and gets out. So being the guy I am, I put my dak in neutral and gave the ol 4.7L hell (I never broke 3K rpms, I’m not that dumb :) he had the nerve to chuckle LOL! as I drove by him, I goosed it and left a lil territory mark (LSD is so cool! :)
I just thought I would share that with you guys, if only I had a camera for that one :-)
Dan
MOPAR=More Power!!
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Jerobie
Dodge Dakota
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7/22/2004
14:22:41
|  RE: 2004 4.7 exhaust suggestion
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Great story about the fartmaster.... Off topic, but well worth it.
I'm running a Flowmaster 40 series w/ just a turn down. With this setup, it's not an echo chaimber (big chrome exhaust tip) making most of the noise. You know, like all the lifted Z71's have. I'm not dissing them, but w/ a turndown, the sound created sounds like raw horsepower! Mine is dumping right infront of my rear axle. This is great, and probably not as loud as craig2xer w/ his Mustang described, however it is quite loud @ 2K rpm. I love it and so does most everyone else that hears my truck. Now, I'm not just crediting Flowmaster on this, I'm sure a Dynomax, or any of the others would sound good w/ a turndown. Just keep in mind, w/ a turndown, you will get more in-cab noise than w/ a tailpipe. Good news is, I got it done @ Midas for $93! Now, to me, that was the best price/benefit upgrade I've done to my truck. There has been a lot of good advice in this thread for someone looking for the right exhaust. Exhaust is a very subjective thing. There really isn't a "best", everyone has a different opinion about what sounds good. If we are talking horsepower, that's different.
Opie, by the way, how does a turndown rate in the horsepower equasion?
Sorry for such a long post....
~Jerobie
Silver 01 CC 4.7L 4x4 3" PA Lift, Clear corners, 15x10 Eagle 589's w/ 31x12.50 BFG Mud Terrains. 40 series Flowmaster/K&N filter. Memphis Belle amp, 12" Kicker S7 Solobaric, Memphis mids, highs, & Premier Head unit.
Wish this thing had a Hemi!
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ALTF4
Dodge Dakota
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7/22/2004
16:49:35
| RE: 2004 4.7 exhaust suggestion
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off topic again but the Hoods fixed and truck looks great, I'm having trouble finding another set of the same box rail I had on my 02 3.9, Brushed alumumin that mached my steps. I had the mopar ones on my 02 but they buggered the install so I had 4 of the posts instead of the regular 2. If you can imagine an arc over these letter"|" and a is the front of the box and b the back here what they were spaced like
a | |______| | b
It looked really cool and like no others, but they are having trouble find me an extra set of posts.
OH well I friggin love this truck..sounds great even now. One of my employees is and anti-dodge guy I took him for a drive and he fell in love(he dis'd my 3.9 all the time).
Thanks for all the info guys I decided that a catbakc system would be my best bet, but now to decide what to get and what to spend? The wife may ask why I need to put a new exhaust on a new truck!!!
Now that I look at it the letter diagram is sad..I should have taken pic of my old truck before I traded it in.
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Monkey_b0y
Dodge Dakota
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7/22/2004
17:08:43
| RE: 2004 4.7 exhaust suggestion
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I am just wondering what muffler is a true bolt in if their is such a thing I could do on my own. I saw that Thrush was mentioned above. Are there any other choices for true drive-way bolt in's?
'04 4 door
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marc
Dodge Dakota
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7/22/2004
18:47:10
| RE: 2004 4.7 exhaust suggestion
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My friend has the 40 series with a turndown on his new ram with the 4.7. It sound Bad A, but he can't sneak in anywhere cuz it's so loud. Would the 50 series sound just as good, just quiter? What about without a turndown?
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craig2xer
Dodge Dakota
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7/22/2004
21:25:42
| RE: 2004 4.7 exhaust suggestion
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In an effort to set the record straight - the flowmasters on my ponycar are directly underneath the passenger compartment & ride ~1 inch from the floorpan = MEGA drone. I associate flowmasters w/ drone because of my situation, but now that I think about it...I'd have probably been ok w/ flowmasters on my truck. My bad! I'd follow Opie's recommendation and find some sound clips. Most of the manufacturers have them now, and specifically mention many of the configurations Opie was talking about. They'll at least give you an idea of what kind of sound you want. Here's a few to get you started:
http://www.exhaustsoundclips.com/
http://www.magnaflow.com/04sound/trucks.htm
http://www.gibsonperformance.com/sounds.asp
http://www.dynomax.com/sounds.stm
http://www.flowmastermufflers.com/cgi-bin/flowmaster/sound.html
Good luck!
PS - Monkey_B0y - my magnaflow is direct fit replacement - it appears they even used the original clamps. (cheap basturdz!)
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ALTF4
Dodge Dakota
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7/22/2004
23:28:50
| RE: 2004 4.7 exhaust suggestion
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I understand that for exhaust to work well you need a good air intake.
So when I was pulling out the stock filter to put my drop in K+N(same part from 3.9) you can imagine my shock when I found a piece of bone dry rye bread in the breadbox I mean airbox! NO biggy it was on the intake side of the filter, but some poor schlep from the dodge plant is missing half his lunch? I find it highly unlikely that it was sucked in, based in where the intake is in the side fender.
But on the plus side my buddy who has a 04 hemi(leaves it at my house during the week..silly silly man) was really impressed with the get up and go my 4.7 has and the sound even at stock.
By mid evening the cool factor contest boiled down to who had the coolest accessories..he won only cuz he has 4 doors.
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dakvader
Dodge Dakota
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7/22/2004
23:31:52
| RE: 2004 4.7 exhaust suggestion
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should taken a picture DCC might have had a good time with that. that is too funny
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Opie
Dodge Dakota
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7/23/2004
11:44:02
| RE: 2004 4.7 exhaust suggestion
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lots of questions out there... here goes:
For the turn-down restriction question, I did a little research and it can pretty much be summarized in saying that the less pipe you have with the least number of turns in it, the better. For you techies out there, the formula for diameter of a pipe versus restriction is:
"The amount of flow is directly propotional to length X radius to the FOURTH power. (if you double the length you half the flow. But if you half the radius you get 1/16 th amount of flow and vice versa)." -Dr Q.
As I have said before, the true performance gains can be had by replacing the muffler or going true dual to omit the stock "Y" that joins the left side manifold to the right.
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Opie
Dodge Dakota
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7/23/2004
14:12:52
| RE: 2004 4.7 exhaust suggestion
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Here is a little more info that took me a while to find. In constructing your exhaust, keep in mind that with a 2 1/2 inch diameter pipe, every 90 degree turn is equal to the restriction of 8 more feet of piping. Every 45 degree bend is worth 5 more feet of pipe. The details of flow dynamics can be found at
http://www.revisor.leg.state.mn.us/arule/4715/3700.html
It is for water flow, but the concepts are almost the same.
As this applies to a "turn down" after the muffler, it is a 45 degree turn (which is the same as a 5-foot straight pipe). If this turn down is used to avoid 5 feet of straight pipe, a 90 degree turn, or 2 45 degree turns, there is less restriction and therefore a more free-flowing system. ta-da!
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Judd
Dodge Dakota
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7/23/2004
15:57:21
| RE: 2004 4.7 exhaust suggestion
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i have an MBRP 3.5" catback and love the sound. it's not too loud, but still sound deep. Especially with an aftermarket intake. MBRP.com
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thrush
Dodge Dakota
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7/23/2004
20:02:52
| RE: 2004 4.7 exhaust suggestion
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There's no less restrictive muffler than a Thrush. I will show you with the pic's and it's only $25. You can easily do it yourself. I'm not knocking Flowmaster because it is a longer lasting muffler, but I didn't want to spend the $75 here for it and have to get a muffler shop involved in the process. They would have cut and welded the stock ss pipes, and then I couldn't go back to stock without cutting and re-welding again. I just clamped the thrush in and can go back to stock or change the Thrush if it burns out the glass packing by clamping the original muffler back on. I will post pictures on my web site and send you the link if anyone is seriously interested. It may take me a day or 2. But, I love my Dakota and the way it sounds......
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