Mufflex drone suppression pipe

[WhiteExpress]

Built one, works great, under a very close set of parameters.
Temperature being one of the largest ones.

Since no air flows through the pipe (capped at one end) the air temp in it doesn't dramatically change compared to ambient air. Sooo, if you dial in the length for say 60° nominal, it looses its effectiveness (almost entirely) in say 30° weather.

I ended up putting the factory tailpipe + resonator back on. I hate how it looks, but not near as much as I hated how the prior setup droned.

 

[PX8]

Yeah, but you don't state which one is better?

Not quite sure what you are talking about??

 

[TheRudeDog]

Not quite sure what you are talking about??

I was referring to which speed gave you the better mileage. I guess you could say it's a no brainer but with the 8 Speed you can never be too sure!

 

[powderbrad]

Maybe its me, but I don't notice drone and ive only got a 14" mufflex.

 

[NYCruiser]

What?

 

[mjd91]

No drone with my delete pipe.

 

[Casper]

Drone is in the ear of the listener.

 

[DatacomGuy]

Little drone in my delete, but only at a few sections on the rpm band.. I drive in tow mode which eliminates almost all of it.

Love my delete.

 

[gsw_03]

Mufflex Suppression Tube

Does anyone have experience with this part? There's more drone with my 18" Mufflex than I would like, but the external sound is great and I'd rather not step down to a 24". Any info would be appreciated.

 

[jbr]

Does anyone have experience with this part? There's more drone with my 18" Mufflex than I would like, but the external sound is great and I'd rather not step down to a 24". Any info would be appreciated.

Press the gear +, gear - button on the steering wheel to turn off MDS. I have the 18" Boeschbuilt kit, when the drone is annoying I put the truck in +8-

 

[gsw_03]

When do you hit the gear+/- button, and does it matter what gear you put it in? Thanks in advance for the help.

 

[jbr]

When do you hit the gear+/- button, and does it matter what gear you put it in? Thanks in advance for the help.

I manually set it to "8" when needed. It allows the truck to use all 8 speeds without using MDS. At cruising speeds it will stay at lower rpms. MDS saves you about 10% on gas, not much.

 

[gsw_03]

Good information, thank you. I'll give that a try.

If anyone has used the drone suppression pipe, I would appreciate your input.

 

[gsw_03]

Exhaust Tips

Should the dual exhaust tips be flush with the bumper or stick out a bit? Mine are flush, but I've seen them both ways. I'm trying to figure out if any of the cabin drone/noise could be coming from somewhere besides the muffler, and that was my first thought. Any opinions?

 

[Dubstep Shep]

I manually set it to "8" when needed. It allows the truck to use all 8 speeds without using MDS. At cruising speeds it will stay at lower rpms. MDS saves you about 10% on gas, not much.

A) I had no clue leaving it in "8" disabled MDS.

B) How is it possible that it sits at a lower RPM when wheel speed is locked in a ratio with engine speed?

 

[mrtosh]

Reviving an old thread. I just installed a 14" on my Rebel and the drone is pretty bad around 57-60 mph. How effective is the drone suppressor for that range? Any updates on those that have the kit?

 

[Housemuzik52]

Reviving an old thread. I just installed a 14" on my Rebel and the drone is pretty bad around 57-60 mph. How effective is the drone suppressor for that range? Any updates on those that have the kit?

I just installed a DODM80 and I know mufflex site says the drone suppressor pipe doesn't work on that exhaust but I've seen that people are doing it. Wondering if anybody has any experience with it on the M80.