youre right, it was with a SUV muffler. they actually wrote later on about testing a regular 40series and it was right up top with the leader

 

5hp isnt going to win or lose a race like thta. and how did you witness a gain by the mufflers? cause you tested them on two differetn days? so many variations to come up with that theory. you would have to do it on a dyno in the same day and same time frame on the same vehicle. if you want performance go straight thru and have rasp, if you want sound go with a chamberd muffler. this debate goes on everything on everysite. if you hate flows great but dotn think that youre typical muffler is better then another cause you have it or you say it is. its all in perference. and ill take the loss in 5HPbs that ppl say and live with a sound i like

 

if i said that was a borla or hooker you would be saying how awesome it was.

 

Nope, because I would take the sound of the hooker anyday over the corsa that was on my 04. The aerochamber isnt raspy like my corsa was. If that was a borla or a hooker on the GTO and it sounded like that, I would still think it sounds like ***. If you like it, hey thats all that counts. You can tell me mine sounds like ***, no big deal. I like mine, weather it be a hooker, flowmaster, etc.... As long as I like the sound, I personally dont give a **** what someone else says.

 

I dont wanna jump in the fire here... but Quik... there is a world of difference from going from flow master to open headers... i know this for a fact.

And... there is a difference going with a different muffler setup. I mean the flowmaster is loud... almost to the point of being annoying, actually it felt like the flowmaster restricted me throughout the rpm band. So, yes, going with a magnaflow or hooker or whichever flows better will be substantial to performance. The exhaust is how the truck breathes, or well exhales i guess... cut open a flowmaster and cut open a magnaflow and you will see how much it flows better without even having to hard test it.

And... idk how long you have been racing or what not... but .05 is .05.. if i beat someone by an inch, a hundreth, a thousandth, or a mile.. its still a win. And a muffler that flows that much better might push you over the edge to run just a tad bit faster... nothing PHENOMINAL but it will help.

you right, it is everyone's preference, all this post was basically about is WHY is flowmaster not the ideal muffler for racing... not that is BAD if you have one.

 

8 pages! phew, i made it. and after a short nap i want to add that i have a flow(came with truck) and was thinking if on an un modified truck that too much flow might be a bad thing. has anyone thought about the low end tq numbes? those are important of everyday none race applications. just another 02 cents!

 

oh ya of course... cutouts will probably be only best for FI applications and big cammed trucks... but a good flowing muffler can never flow TOO good unless its straight piped.. in which case there would be no muffler, lol.

 

The muffler i put on my truck cost me $29.99 from summit, its a 2 chamber design and i have it coming out in front of the right tire. I like it, its a force pro series. I never heard of them before but i figured what the hell for $30 bucks.

 

Let's get a few facts in. Given the CFM requirements for exhaust flow of any individual vehicle, as long as a muffler meets those CFM requirements it will not loose hp compared to any muffler of equal of greater CFM capacity. Meaning that using CFM data alone in determining a muffler is a poor basis for reasoning. Having a properly tuned header with the right length collector will make more of a difference in hp than any muffler combination too. That is dyno proven. What needs to be realized is how a muffler affects the tuned length of a given exhaust system. If you have the right headers, and the right length of exhaust tubing then using any muffler that fullfills the CFM requirement will work and using a muffler with greater CFM capacity is a waste of money. It doesn't matter if it is a chambered type muffler or a straight through design as long as it doesn't affect the tuned length. For those who swapped to one muffle or another and picked up power, you changed to tuned lenght to one that was more optimized for your particular vehicle...simple as that. Where CFM comes into play is where it meets the requirements for your exhaust system. While there is some truth to not having too much CFM, there is a point where it is a waste and no performance gains will be realized. What this means is if you took a particular vehicle with an optimized header/collector/etc. setup and compared 2 mufflers, say a Flowmaster and a Dynomax, and both flow sufficient volume for the application, then there will be no power gains as long as the Dynomax is placed where it does not affect tuned length. By it's design the chambered Flowmasters do not affect tuned lengths one way or another. The Dynomax, like other straight through designs will affect depending on the distance from the collector and if not placed correctly will decrease performance even though it may have a higher flow value. Using one set of dyno/flowbench results on one partucular application does not and cannot be used as a definitive arguement for one muffler's superiority over another.


BTW if you use a termination chamber it won't make any difference no matter what muffler you use. Choice will only affect what type of sound you get...

 

http://kalecoauto.com/index.php?main...&products_id=2

there it is, the newest, greatest thing ever, its way better than flowmaster.