How can I quiet down my exhaust whistle?

[RoosterXP]

Ive had the 4" flo pro with inline muffler for about a month now, the exhaust is very loud, i thought for sure with an inline muffler it would have muffled it. . not really. when i hit the exhaust brake when idling the whistle is crazy loud. . what can i put on to muffle this whistle?



(please dont tell me to put the stock stuff back on because it aint gonna happen)

 

[AH64ID]

On my 05 I went to a 40" straight thru muffler and it hurt my ears to use the exhaust brake, so I added an OEM resonator from a mega cab, 5. 9L, and the tone is the same but the whistle is GONE!!

I would look for a small 4" resonator and it should help out.

 

[n7gxz]

I was getting a bad dron at around 2K so I added a FTE resonator/muffler http://www.ftediesel.com/store/pc/viewPrd.asp?idproduct=89&idcategory=7 which took care of the dron and also dropped the whistle down as well.

Kevin

 

[RoosterXP]

So I took your advice n7gxz and ordered one of those resonators. . i ordered the 30" one. Ill report back after I install it.

 

[AEdelheit]

Most of those straight though mufflers are reversible but only have baffles facing one way, might want to check which way its installed.

 

[RoosterXP]

Ok Got the resonator installed and i kept my Flo-Pro muffler installed after resonator... . so here it is, the good and bad. .

The good: The sound is nice, it has a really throaty meaty sound, definitely mellowed out the whistle.

the Bad: My mileage dropped by 2. 5 mpg. . The truck felt like it had a hard time getting up to 70, i felt that i really had to mash on the throttle and hold it there while cruising, made the engine response more like a on\off switch rather than a rheostat. . I could also hint a faint annoying drone in the cab with this installed. I was seeing around 3-4 psi of boost at 70 before this resonator, after the install i was seeing 10 psi at 70...

so take it as you see it. I don't think its going to be what i need and am going back to just the plain muffler that has been on it. I can live with the noise and better fuel mileage!

 

[DBithell]

if you have dpf back - what difference does any muffler make??? you WANT to hear the whistle - means the VGT slide isn't clogged up. all good. when you don't hear the whistle turbo is clogging.

 

[RoosterXP]

if you have dpf back - what difference does any muffler make??? you WANT to hear the whistle - means the VGT slide isn't clogged up. all good. when you don't hear the whistle turbo is clogging.

yea. . i should probably update my signature. . i have full deletes now. No DPF filters. . only a flopro filter, the rest is 4" pipe from turbo