Yeah, flowmasters RULE! (In 1990, that is) They work GREAT with turbos-that's why all the guys on turbomustangs.com with really quick cars avoid them like the plague. Again and again, the power losses with flowmasters are well documented. Like I said, they were the shiznit 10 or 15 years ago. The competition has LONG since passed them. Magnaflow in particular is noted for producing the same deep sound that flowmasters do, minus the resonance. I personally picked up 2 tenths and almost 2 mph in the 1/4 by simply changing from flowmasters to magnaflow.

But yeah, magnaflow is crap. Go on and put the big flowmasters on the truck-you'll be COOL!

 

Uh, cats aren't chambered.

 

Thank you...

 

for someone who has a stock truck you sure have a big opinion , when you have used your truck for testing almost all chips and many mufflers on the dyno time and time again, TALK LOUD.ive been through a turbo already testing performance boxes for a company with 4k miles on my truck, oh yeah im a tech for a dealership and only work on them day after day for the past 18yrs what do i know......

 

Oh Man, my bad. I didn't realize that I had to have a modified truck to have an opinion. Man, some of us must look like ANTS from way up there!

Ok, since it has been established that my opinion does not count because after all, my truck is stock, maybe facts would work instead?


I seem to recall reading a little something like this: "flowmaster mufflers work awesome, egts are the same with the series 30 race muffler as the piecs of crap magnaflow"


Ok, if I understand the esteemed author of this, (s)he is saying that series 30 race flowmaster mufflers produce egt's in the same range as a piece of crap magnaflow. Now, to break it on down to parade rest, the author is telling us that it takes a RACE flowmaster to equal the egt's of a magnaflow. But, we are to draw the conclusion (as the original author obviously did) that the MAGNAFLOW is a piece of crap. Forgive me if I'm being obviously dumb here, but I'm not sure I follow this logic.


Continuing on, we are informed that: " its funny someone said that chambered mufflers arent for diesels but probabaly 70% of them are running cats now, go figure"

Again, perhaps showing my total ignorance (after all, my truck is STOCK for crying out loud!) I would infer from the above that catalytic converters are chambered. Or, to generalize a bit more, we are led to believe that the presence of catalytic converters on 70% of turbodiesels is conclusive proof that chambered mufflers do indeed work well on turbodiesels. As I see it, the presence of converters on diesels is related to chambered muffler performance at least as much as the presence of taillights is related to the life of the passenger side front control arm bushings on a car. Maybe even more!


So, our original author has done much to prove his points. Who can deny that catalytic converters on diesels is conclusive evidence that chambered mufflers work well for diesels? I certainly can't. To do so would be to express an OPINION, one not in agreement with our expert author, who after all, has worked on cummins turbodiesels in dodge pickup trucks for 18 years.
(I assume that's what (s)he means by " im a tech for a dealership and only work on them day after day for the past 18yrs"
Now, this is the year 2004. Eighteen years ago was the year 1986. If I recall correctly, dodge did not make the cummins engine available in pickup trucks until the model year 1989. However, we shall ignore this small instance of time travel, and instead turn our attention to our author's steely grasp of the intricacies of turbodiesel exhaust systems.

To our author's credit, (s)he has also conclusively proven that maglaflows are pieces of crap. To regurgitate the logic once again, the author states that a RACE flowmaster can equal the egt's of a magnaflow. This great information obviously took a great many of the author's 18 years to glean, and illustrates that NO ONE under ANY circumstances should buy a magnaflow. They are, after all, pieces of crap.


I must now immediately run out and put lots of aftermarket parts on my truck. At some point in the process, my opinion will begin to matter!

 

Hey, check this out. Maybe this guy has enough mods on his car to have an opinion:


http://www.turbomustangs.com/mufflerswap.htm


Admittedly, this is a gas motor. But, this case illustrates the hp losses you can achieve by running flowmasters with turbos. I don't pretend to have an OPINION as to why turbos and chambered mufflers don't work so well together, I can only report what I've seen myself along with countless other people running turbos.

 

for someone with a stlightly modified truck, you sure have a big opinion... push that 4" pipe to its limits, and THEN see just how bad that flowmaster is vs. a straight through muffler...

it's your money, if you want to argue with logic and facts, go for it!

Forrest

 

Forrest, his hot air and 18 (?) years of dedicated service to the CTD industry no doubt outweighs any facts and logic we may be able to muster. At no point should anyone doubt his exhaustive testing, as surely any results not agreeing with him are small rips in the laws of physics, and as such are to be politely ignored. After all, he has LOTS OF PARTS on his truck, parts that ma mopar did not put there. That makes him an expert. Frankly, I'm surprised you even dare to question him. I know I've been duly humbled.

 

LMAO...

 

Can't we all just get along? This site is intended for adult content and the use of everyones knowledge to become more informed about our trucks. Maybee the bigger man is the first one to apoligize, or just accept that if we were all the same their would be no reason for this forum. So remember, this is not a playground, lets all act like adults even if we are'nt just my .002


ps this forum can be fun for everyone, if we try.....cleanitup

 

Sounds good. Unfortunately, sometimes a little corrective action is called for. It also helps when one's statements about technical aspects of the trucks are correct. This is doubly true when one is attempting to insult another based on those technical aspects. (i.e. the chambered muffler and cat converter thing)

As you probably noticed, I don't take kindly to being belittled based on how many aftermarket parts my truck does or does not have. Particularly when the basis for the insults are just factually wrong.

 

obviously you have all the answers, sorry for trying to state the facts about the drone on the magnaflow since i got the same info from this site and went on holidays shortly after installing this muffler pulling a 32' fifth wheel, the drone and resonance was so bad that my change would rattle in cup holder, i was just trying to state that if your empty or pull light loads the muffler is tollerable, but if you pull heavy day after day you will be adding more resonators or a different muffler. i took the advise of people on this forum a while back and wasted 200$, just tyring to give concrete advice thats all, the difference in flow would be irrevelant to you or i since the factory muffler would probobaly do, but i wanted it to sound different thats the only reason why i changed it. easy does it vb440 keep your blood pressure down, were all just shootin the sh.t here.

 

Now see, that's the type of response I would have expected in the first place. Not something about my truck is stock, therefore I know little or nothing. You have just now provided much more info about what you were actually trying to say than you did in all your previous posts. I mean, try to see it from the viewpoint of everybody who read the earlier posts. You at least seemed to be linking chambered mufflers to catalytic converters, and then there was the egt's thing.

Now, contrast what you just said to that-this time, you provided solid, concrete experience on what happened in your truck with a particular muffler. There's nothing wrong with that-no sweeping general statements or insults.

I have no problem swallowing what you just posted-you tried a muffler, it was horrible in your truck, and you didn't like it. None of the details you just provided were available in what you posted earlier. Without those details, the earlier posts took on a RADICALLY different tone.

 

one thing that I feel needs to be mentioned with any discussion of performance exhaust and resonance when it comes to these trucks is... SOUND DEADENER!!

I'm willing to bet that my truck with 5" straight pipe had less interior resonance than your 4" Magnaflow system... all because of the sound deadener I added.

loud and nasty outside, nice and comfy inside

Forrest

 

Why does almost every simple question on this board turn into a pis-sing match. I hate posting questions here just because I'm afraid of who is going to hastefully post their own opinion and try to prove why their right by cutting my throat. Truthfully this board is 99% male and is worse than any board with an equal population of women.
Truth is, I asked a simple question. I wanted an opinion of someone with experience with a similar system, not a war over mufflers. I've been racing for several years and I know that Flowmasters are restrictive... But it's a freakin' diesel, not a race car. I'm not trying to squeeze EVERY ounce of possible power out of it. It makes over 400hp and weighs 7800lbs. If the Flow robbed 5hp, could I feel it? NO!!!
Now thanks to those that answered my question without flaming...