6.4 Resonator Delete

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1500ram12

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99% of my driving is "city" driving so mds to me is more of a hindrance than a benefit.

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68PowerWagon

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I'm the opposite. I use my MDS all the time and don't feel it's useless. I get better empty highway mileage than our lead guitar players 6.2 Ferd, and way better than my bro-in-laws 2012 chevy 6.0 ever did. He traded that in on a Dirtymax because the mileage was about 12. Get about the same as my father in laws 2012 ecoboost max tow. He isn't very impressed with the Eco, but likes the boost.

The flapper's function in the muffleris more than likely similar to the performance mufflers with a flapper. Noise reduction. At idle and part throttle the flap is closed, causing the exhaust to take a longer path to exit the muffler, reducing volume when maximum performance is not needed. Waith more throttle the flapper is forced open by exhaust pressure giving the exhaust a less restrictive exit, freeing up some power at the expense of more noise.

The resonator is for mds drone.
I see resonators on most new vehicles though. That's why I thought it had something to do with emisions.
 

drittal

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I see resonators on most new vehicles though. That's why I thought it had something to do with emisions.

After the cats it's not about emissions. Just sound and drone reduction.
 
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1500ram12

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In what way does it hinder your driving?

Hinder might not of been the correct word. When ever it kicked in I always found myself giving it more gas to get out of the mds mode. I felt that the truck just wasn't responsive when not using tow/haul

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Ratket

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in the city I always lock out in 4th on the selector and turn on tow haul.. it has become a habit.
 

MADDOG

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I just use manual shift mode all the time. My truck rarely sees full auto unless it's an extended road trip with the cruise on. Without a reso it has just the slightest bit of drone but I just turn up the tunes and it disappears.
 

drittal

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Unless they start offering a 3.5" in/out configuration it's probably not a good option for the 6.4L trucks. But looks intriguing.

Just showing the reason behind the flapper in our stock muffler. Sound and drone reduction.
 

drittal

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A buddy has this on his Silverado and isn't happy with it. No louder than stock muffler unless your foot in through the floor. He's going to take the resonator of to see if that helps.

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So it works just like it's supposed to. And this shows why our mufflers have the flapper.
 

Underarock13

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I cut my resignator off and installed a magnaflow muffler. It has a very deep rumble and no droning. Took about two weeks to break in. At first it's almost to loud and droning but mellowed out nicely.
 
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