Exhaust resonance begone. HOW?

[MCummings]

I thought about this idea first when two things happened.

1. I went on a 3 hour drive at 70MPH with my Straight Piped truck.

2. I saw Evan A. Beck's old post about a dealer smashing up his truck, I saw his signature.

When I went on that "drive" my Family was with my, and we all had some descent Mind numbness from the Exhaust resonating in the cab. See signature for current exhaust setup.

I was THINKING, after seeing Evan's Post. . That, If I put a dual 3" or 4" Exhaust right after the Turbo Down-pipe and routed the pipe out the back Just like the stock exhaust locations,, Difference being. . One Exhaust exit on each side behind mudflap.

Would dual exhaust Take out the Cab resonance? or make it worse?

*I* REALLY like the Straight piped 3" Exhaust sound, and Loudness, But Highway trips are torture.
Trying to talk normal at 70-75MPH is almost impossible.
Music makes all the problems go away. But it is impossible to listen to music all the time.

Suggestions. . ?
I have the ATS Manifold, and that Decreased the resonance ALOT, but still resonance becomes bothersome after 3 Hours of driving 70.

MerrickNJr
Thanks in advance.

------------------
1998. 5 Dodge 3500, 2wd
5-Speed, Light Driftwood
Replaced the Resonator and Muffler with 6ft of 3" Aluminized pipe.
3. 55 rear-end
A. R. E. Camper
Michelin 245/75/16's

 

[mikel]

I cut out a chunk of the pipe and installed about 18" of flex. It made a big difference in the drone in my truck. I also installed a walker muffler (can't remember the #, see sig) and it really took care of my freeway drone, but it makes the truck sound pretty odd at times. I wouldn't recommend it if you haven't heard it on someone else's truck.

Good luck,
Mike

------------------
'99 QC 2500 SLT Driftwood 2wd SB 24v Auto 3. 55 LSD
ISSPRO boost and pyrometer, Autometer 3 gauge replacement pillar, Walker 24168, DTT VB
'00 Durango SLT 360, 3. 55, Patriot Blue
-- email address removed --
Howdy Agg's!

 

[cullyguy]

Check out http://www.epiflex.com for some help with the drone.

------------------
Steve in Spokane,01 4x4 Auto Quad Cab SB, NRA Life Member, 99- H-D FLHRCI Coalbalt Blue,00 XR650R Power Upped, Former PSD owner

 

[Great White]

I pulled the rear seat out and installed 1" sound deadning foam purchased at West Marine $50. 00 Was GREAT IMPROVEMENT. Before I could not hear my son speak from the back seat (Not always a bad thing!) Now much of the harmonic seems to be damped out. Next is the engine room kit from APC. The kit is supposed to reduce the clatter by 3Db which is 50% reduction. Costs $1000. 00 .
Rich

------------------
2001. 5 2500 ETH/DEE 4x4,Patriot Blue over Silver,Camper pkg, Trailerpkg,3. 54LSD, Agate Leather,Stainless Smitty Bars,Tow hooks,Amsoil,Window Fix... ... ... Except snowplow!

 

[WOWZY]

After I straight piped mine, I wondered how the drone would affect the family on long trips.
After about an hour or less into the trips, I have no one to talk to because they're all asleep and remain that way for about 2 hours.

The sound is better than a Lullaby everytime! #ad

<font color=blue>



------------------
'99 2500HD Quad Cab 4x4, Intense Blue Pearlcoat, Fully loaded w/Agate leather interior, 5-speed, 4. 10 Limited Slip, Skyjacker Leveling kit, Heckethorn Nitro 9000 shocks w/dual End to End steering stabilizers, 35x12. 50x16. 5 BFG/AT KO's on 9. 75x16. 5 Eagle 589 Aluminum Wheels, 9004 Cool Blue's, Silencer Ring removed, Fog Lights relay pulled, No muffler, No resonator, 4" straight pipe, Northwest Customs Stainless Steel Rocker Panels, Steel Horse Stainless Steel Nerf Bars, K&N Filter,Custom POWEREDGE W/HOT Programs 60/80/100+HP, Grover Air Horns, Autometer Ultra-Lite Gauges.

 

[EMDDIESEL]

Be careful of the sound deadening kits that invlolve covering the exhaust manifold or exhaust side of the turbo. Speaking from past expieriences with insulating any of the above mentioned items they will shorten the lifespan of them not to mention increase you inlet air temps since the turbo will not be able to shed as much heat and will instead pass more heat to the compressor side of the turbo. I have also seen exhaust manifolds crack due to exxsessive heat buildup caused by these blankets.