moge11

Does anybody have proven results??? track or dyno?? what can i expect from a magnaflow 14267 muffler swap..? Im not quite sure if i should expect a Full .1 and 1mph, or maybe .2 and 1.5-2.0mph in the 1/8 or what???

I have the muffler already... traded a weed eater to my brother... so its free and brand new in the box...

I went 8.37 at 85.26mph at 1422' DA... Who thinks an 8.2x at 86+mph can be had in identical weather conditions?? or possibly even quicker???

moge11

is a .10 and 1mph feasible??

HCI2000SS

iTrader: (2)

It's not even going to be measurable lol

moge11

so ur telling me it wont pick up 7-10rwhp?

sawblade99Z

iTrader: (1)

7-10 rwhp? Not a chance. You might gain a couple at best. If you're shooting for a power gain without having to really tear anything apart, get a cutout.

Tbird232ci

iTrader: (4)

If you had a catback, maybe. Muffler, no.

moge11

So which of you guys has tested this on track or dyno or have any kind of solid evidence???

HCI2000SS

iTrader: (2)

I think it's just kind of universal knowledge to be honest lol. I mean if you don't believe it do a goggle search, search the forums, etc...

thunderstruck507

iTrader: (18)

There are good gains to be had in ditching the stock exhaust, but a good portion of that is a crappy y pipe and I pipe. Just changing the muffler alone won't net much.

moge11

Ok.. so why does everyone say there is such a big difference between a Flowmaster and a magnaflow or LM1/2 catback then?? they have the same 3" piping??? stock I-pipe is 2-3/4"...

HCI2000SS

iTrader: (2)

Well first of all Flowmaster mufflers are chambered which will not flow as well as a straight through style muffler, and a lot of the transverse style mufflers like FM don't flow as well either. All in all there is little difference between the actual mufflers themselves in terms of hp, but the real difference is more in the rest of the the exhaust system

moge11

I was just wondering what ppl thought.... car has been a best of 85.55mph on 2 passes.. we'll see what it does... if it breaks 86mph, I'll be more than happy

thunderstruck507

iTrader: (18)

the flowmaster crossflow muffler sucks and becomes a huge restriction with a modded car

there won't be much difference in power between a LM1, LM2, or Magnaflow (the LM1 is just loud and raspy as ****)



There is a guy on here with a green ls swapped lt1 style car that claimed to pick up power by only switching the muffler, but I do not think he was stock otherwise.

moge11

all i know is that, people said i wouldnt notice the Free mods either.. I put on my lid, did freemods and pick up a TON SOTP.. Felt like 20+hp...gained 1.5mph in the 1/8...

99Bluz28

iTrader: (35)

Put it on it'll flow better and sound better! As far as power gains,.... maybe 3-5 rwhp.

moge11

im gonna put it on soon... i figured 3-5... hoping for 7ish.... just wanted real world results with documentation... not people saying, Oh you wont notice it, blah blah blah... I notice everything. I notice Night and Day differences.. Literally, day time to night time... at nighttime it cools off and car runs hard as hell.

Sladester2

iTrader: (1)

You are feeling what you want to feel then because a lid and a few free mods you will not notice a huge SOTP at all..

moge11

YOU will not.. I did.. I didnt notice a damn thing right away...it actually took a week or two.. computer compensated, then i could feel it.. and no, it wasnt the weather.. i pay attention and notice that too.... i run the dogshit outta my car all day everday...if it feels faster, i go run my marked of 1/4 mile to confirm... and my sotp is always confirmed with another 1-2mph.. give or take....

Midnight02

iTrader: (8)

The extra 0.74 mph you need to get to 86 mph in the 1/8 mile is well within the variances of changes in the air, temperature, etc. Even if you hit 86 mph, it would be tough to say with any certainty it was only because of the muffler swap.

moge11

....I keep track of DA.... i want 86mph in 1450'+DA