Is it me or is everyone stuck on flowmaster?

[Xan]

I'm about to do my exhaust on my truck (will have it done next wensday) and when i was choosing a muffler i thought about alot of mufflers but i din't even think about flowmaster... I ran maganaflow on my t-bird, SLP on my grandam, hooker on my Z28, magnaflow on my caddy, and dynatech on my cutlass. i put a flowmaster muffler on my cosins 2001 transam but it wasn't great till we threw on some large square gibson tips and it sounded awsome then.

Personaly i think magnaflow is way more refined at cruising speeds and more deep and aggressive at wide open throttle, so i'm going with a direct link 2 in 2 out muffler from them and sending both pipes straight out the back. hopefully we get some sun next week on wensday and i'll toss up some pics

 

[Mutineer]

Personaly i think magnaflow is way more refined at cruising speeds and more deep and aggressive at wide open throttle

Maganflow is a better sound. But I have heard that Flowmaster yields better performance.

Im running true duals w/o secondary cats and dual Flowmaster 40S, and it sounds GREAT and works GREAT.

I do like magnaflow's sound, though I have never personally used them. Always went with Flowmaster , usually for price sake.

Daniel

 

[Xan]

you know i'm not sure about the preformance side but i'm guess if there is some kind of difference its very small like 1hp or something, but i'm geting my muffler through a magnaflow dealer so its pretty dirt cheap.
i feel strongly about not buying cat back kits when they woln't give me duals i woln't be happy with the looks, cost way more and do more work
i did buy cat backs for my z28 and my grandam because they were what i wanted

I think if you're really looking to get all you can by putting on exhaust you should be looking at bassani (JLP) or borla but thier prices are through the roof

 

[Gopher]

I have 2 mufflers that i run. I have a 2.25" magnaflow i run everyday and a 2.25" 2chamber 40 series flowmaster i run for smog. I run both just depends on my mood. From what i can tell from what i have: The magnaflow gives me more backpressure and when floored has a more even pull throughout the rpm. The flowmaster seems to have less low end, but once i get in to the higher rpm it pulls hard. Both mufflers sound good. The flowmaster is louder than the magnaflow. I think its all personal preference. Both of my mufflers are hung in stock location. The flowmaster dumps to the right right in front of my rear tire. The Magnaflow only has about 6 inches of pipe out the back and dumps.

Oh i do get a slight drone with the flowmaster.

This is also on the 4.0 OHV

 

[Chrisbequick]

Maganflow is a better sound. But I have heard that Flowmaster yields better performance.

Asolutely not. In fact, the exact opposite is true. It's well known that Flowmaster is among the worst-flowing aftermarket mufflers available. Magnaflow, on the other hand, is amongst the best. Any straight-through muffler is going to flow better than any chambered muffler.

-Chris

 

[TerryS1980]

I am glad I switched to Magnaflow. They are a bit quieter at idle, but have much better sound at higher rpms.

 

[Gopher]

True havnig flow is good. BUt when you have an engine that requires some backpressure havnig to much flow can hurt you. Just have to find a balance and know what product you are dealing with and how to maximize the performance.

 

[TerryS1980]

IMO I think the backpressure thing is overrated. It would take some serious exhaust modifications for you to loose enough backpressure to cause any adverse effects.

 

[BlackedOutEXPO99]

i had no exhaust and there was no back pressure and the take off sucked but with my new flowmaster 40 i have amazing torque and the sound is amazing my friend has magnaflow on his ranger and it has a smoother rumble sound but my 40 series has a screaming aggressive tone that never gives up

 

[scaperrotta06]

mac tk5072

i love my mac exhaust its 3" in and out sounds really good on the highway

 

[Xan]

its like this, the more air you put in the less back pressure you need. When you buy your new car/truck/suv, you can almost guarantee (unless you're buying a corvette jag, or something) that its not gonna be tuned for maximum performance (meaning HP, torque, gas mileage) its tuned usually for quiet, smooth, emission legal/low.
now if you decide to run something like 3.5" pipe and straight through mufflers on your stock engine. i think you're gonna be hosed

True havnig flow is good. BUt when you have an engine that requires some backpressure havnig to much flow can hurt you. Just have to find a balance and know what product you are dealing with and how to maximize the performance.

 

[J1211c]

I have magna flows and absolutly love them i noticed a incease in power and definantly in the sound.

 

[Turdle]

http://www.explorerforum.com/forums/showthread.php?t=180580&highlight=exhaust+thread

Maybe these should be merged--

 

[Mutineer]

Right now Im running true dual flowmaster 40S on a 5.0L.

I hate the agressive "pang pang" sound I get from Flowmaster 40S at High RPM.

I LOVE the way a Magnaflow SOUNDS.

I have never run Magnaflow, but those I know that did said it sounded great and worked very well, but did not match the Flowmaster for performance.

This is all on mildly modified V-8 engines (C A Intakes, catback system, etc...).

Personally I am going with Magnaflow this time to match with my Torque Monsters, and then ill be able to guage it for myself.

its like this, the more air you put in the less back pressure you need. When you buy your new car/truck/suv, you can almost guarantee (unless you're buying a corvette jag, or something) that its not gonna be tuned for maximum performance (meaning HP, torque, gas mileage) its tuned usually for quiet, smooth, emission legal/low.
now if you decide to run something like 3.5" pipe and straight through mufflers on your stock engine. i think you're gonna be hosed

Right.

The need for Backpressure is directly relative to the cam ratio and the spring rate on the valvetrain for proper timing of the valvetrain/ignition. If the stock valve springs are rated for x.. Amount of backpressure to make them seal correctly before the next compression stroke, then it will definately effect the way your engine runs when you loose some or all of your backpressure.

Even small amounts of backpressure loss can make a difference, if your trying to shave 5 tenths off your 1/4 mile time, this will matter to you.

For a daily driver, not so much.

Just remember sometimes you can over-analyze the subject, and not everyone will get the same results on their vehicle, and not everyone will notice the differences they get.

Daniel

 

[RickOTR]

I am running a Bassani dual exhaust system on mine right now and have to say there is not a muffler out there that can beat it. Yes expensive ($350 each), but once you put them on and start it up you will be smiling from ear to ear.

 

[Turdle]

I am running a Bassani dual exhaust system on mine right now and have to say there is not a muffler out there that can beat it. Yes expensive ($350 each), but once you put them on and start it up you will be smiling from ear to ear.

For 350 each there better be a hand that reaches up and makes me grin--

 

[Mutineer]

For 350 each there better be a hand that reaches up and makes me grin--

HOOAH! lol

Daniel

 

[CDW6212R]

Someone needs a couple of Aero tech resonators also, those are over $150 each. They want $250 for the mufflers, it amazes me at how much money people will blow.

Mufflers have not advanced much in 25 years, 90% of all performance mufflers sold now are simply; straight through holed pipes with packing material. The Flowmasters and a small few others which are baffled are more promising for performance.

The holed pipes(louvered) are extremely restrictive compared to a straight pipe. That's where the deception is, people see straight through a muffler and figure that has to be best. It definately isn't the quietest, and I do not like loud mufflers. I want great performance without loudness. The sound of power should come from the engine, not the muffler. Regards,

 

[RickOTR]

Expensive!, some people spend that much on a worthless exhaust system or other add ons that don't increase HP or milage. Bassani is a proven name and is used on many high end sports cars and luxury vehicles. Also, mufflers have come a long way in the last 25 years and these manufactures don't put crap on their vehicles like Ford and GM. None of them sound as good as a Bassani. And ya... they will reach up and make ya grin )

 

[IZwack]

I've researched this "backpressure" thing a little while ago and from what I came up with, less is more!

Here's the low-down on what my digging turned up: each exhaust valve is actuated by the camshaft which requires energy. The more pressure there is behind the valve, the harder it is to open.

This is the reason why top-fuel dragsters run just vertical tubes and nothing more. I think I also read somewhere that F1's (or was it NASCAR) run very little backpressure.