I always go up one Size when picking a Muffler, of the Pipe is 2 1/4, I will use Mufflers that are 2 1/2, if the Pipe is 2 1/2, the Muffler is 3, etc. If there is Room, I will also Pick the Longest Body, as the change in angle is Lower. I won't even go near a Flowmaster, as the OEM Mufflers, often flow Better
That offset offset muffler lost way more flow capacity than I would have guess, this is some amazing information! Now if you could eventually get into some acoustics nerding with Rich. I need to be able to manipulate the tone better on my projects.
Really good information. I’m definitely leaning towards a magnaflow. They are essentially just larger resonators, they are great for flow as the name implies.
I never would have guessed that an offset straight through oval muffler would have similar air flow to a generic chambered muffler (Flowmaster). I've been living a lie lmaoo. Next thought.. I wonder how much sound levels would differ between same body size straight through muffler, center/center vs offset/offset? Obviously one would think the straight through would be louder.. But how much louder are we talking?
Is the air your testing with room temperature passing thru those mufflers or is it hot air as it would be in real use? Would like to see this done with hot air passing thru 4 a more accurate test if possible
Don’t get too hung up on mufflers tested on a flow bench… A lot of muffler start to shine due to the heat they create. Without the hot air from the engine they won’t perform as good… Although, I need to know where this flow bench is located. If there’s any one muffler that needs flow tested it’s the Flowmaster Pro Series Outlaw… It is literally blocked with a plug which causes the air to go around into the body, which is actually more area than the plug blocks. Also, the plug creates a major drag on the backside. Creating a massive scavenge effect on the airflow…
Yes, but how many cfm depends on engine exhaust air flow. Maybe you only need 300 cfm. It would be interested to see pressure results. Either way, Magnaflows don't usually sound good by themselves.
I just got this set up. My truck wouldn’t take Flowmaster dual exhaust on my 2020 GMC sierra 3500 double cab long box. so I had to go with the magna flow. If you’re looking for sound, this is not it. it looks amazing on the truck. It has a little sound, but I am not impressed at all kind of disappointed to be honest. Oh well.
Loud does not equal power on a stock engine. A stock engine or engines up to 450 to 500 hp - street driven engines - make more power with 3" single exhaust.
How pointless is this test unless you are talking about installing immediately off of your heads?! Your exhaust is going to have bends in the manifolds/headers and any other pipe ahead of the muffler. Plus, throw in any converters if stock or if you plan on having it on the street in any state that may still test a classic vehicle. Every bit matters on the strip/track but does it matter on the street where you only occasionally be using operating in peak hp range?
I always go up one Size when picking a Muffler, of the Pipe is 2 1/4, I will use Mufflers that are 2 1/2, if the Pipe is 2 1/2, the Muffler is 3, etc. If there is Room, I will also Pick the Longest Body, as the change in angle is Lower. I won't even go near a Flowmaster, as the OEM Mufflers, often flow Better
That offset offset muffler lost way more flow capacity than I would have guess, this is some amazing information! Now if you could eventually get into some acoustics nerding with Rich. I need to be able to manipulate the tone better on my projects.
This is inline with my dyno testing. Old flowmaster offest/offset were killing about 4 tenths ET at 650-680 hp level
Loved this video really explained it to me in a way I understood!
Thanks for watching Chris !
Nice video! My only question would be what if you had a single inlet go dual outlet (straight thru) how would that affect CFM?
Do you have 4" inlet and outlet or do you have a 4.5" inlet and outlet mufflers available
Really good information. I’m definitely leaning towards a magnaflow. They are essentially just larger resonators, they are great for flow as the name implies.
Good choice!
I never would have guessed that an offset straight through oval muffler would have similar air flow to a generic chambered muffler (Flowmaster). I've been living a lie lmaoo.
Next thought.. I wonder how much sound levels would differ between same body size straight through muffler, center/center vs offset/offset? Obviously one would think the straight through would be louder.. But how much louder are we talking?
Is the air your testing with room temperature passing thru those mufflers or is it hot air as it would be in real use? Would like to see this done with hot air passing thru 4 a more accurate test if possible
I have the dual 3” bullets straight through but the cab drone is loud.
I loved having Magnapacks on my old GT.
How about the mf12469 compared to a normal X-pipe?
Is this WHP?
Don’t get too hung up on mufflers tested on a flow bench…
A lot of muffler start to shine due to the heat they create. Without the hot air from the engine they won’t perform as good…
Although, I need to know where this flow bench is located.
If there’s any one muffler that needs flow tested it’s the Flowmaster Pro Series Outlaw…
It is literally blocked with a plug which causes the air to go around into the body, which is actually more area than the plug blocks. Also, the plug creates a major drag on the backside. Creating a massive scavenge effect on the airflow…
I assume your talking about the laminar flow muffler, if so I to wanna see that reviewed in depth
Very good video thank you
Glad you enjoyed it! Thanks for watching !
🔥
Yes, but how many cfm depends on engine exhaust air flow. Maybe you only need 300 cfm.
It would be interested to see pressure results.
Either way, Magnaflows don't usually sound good by themselves.
I just got this set up. My truck wouldn’t take Flowmaster dual exhaust on my 2020 GMC sierra 3500 double cab long box. so I had to go with the magna flow. If you’re looking for sound, this is not it. it looks amazing on the truck. It has a little sound, but I am not impressed at all kind of disappointed to be honest. Oh well.
Loud does not equal power on a stock engine.
A stock engine or engines up to 450 to 500 hp - street driven engines - make more power with 3" single exhaust.
Straight through is straight through, smaller can bigger voice, simple engineering really...
For a second, I thought the whole video was going to be in black and white.
Hahahahaha! I know what you see mate
How pointless is this test unless you are talking about installing immediately off of your heads?! Your exhaust is going to have bends in the manifolds/headers and any other pipe ahead of the muffler. Plus, throw in any converters if stock or if you plan on having it on the street in any state that may still test a classic vehicle. Every bit matters on the strip/track but does it matter on the street where you only occasionally be using operating in peak hp range?
You guys just saved me 880$
Thanks for watching !!
Dyno is the real test