Tired of the drone. Need advice

[Jordan@Apollo-Optics]

Thanks for the link to the J pipe solution. Seems to be a complicated problem, and each car is different.

It's called a Helmholtz Resonator. Basically an empty chamber that is designed to reduce resonance in tubes with air flow moving through them.

Our stock airboxes use the Helmholtz Resonator. It's why when you put on a different intake you start to hear that whistling noise.

 

[RV-Junke]

Interesting...Thanks for this.

 

[Wilson]

ear plugs

 

[RV-Junke]

Exhaust Drone GONE!

Helmotz resonator was correct on what the fix was...thanks! After a ton of looking around and a few calculators, I figured a 29" pipe would solve the almost un-drivable drone at 1,500 - 1,900 rpm's, specifically in 4th - 6th gear...worked out to about 45 - 60 mph.

Found a shop in Linden AMS Autowerks, Diogo is the owner to do the work...The shop is amazing, as these guys seem to know more about cars and how to fix things than anyone I have ever met...

Diogo and his crew got my "X" pipe off, and welded 2-3" Tubes 29" long...and amazingly it canceled the Drone 100%...really amazing! My wife likes to drive in the truck again!







Sorry for the poor quality of the photos...For those thinking there is no hope...there is! BTW, the Stainless Works Headers and Exhaust sounds even more bad-ass than before!

Here is the calculation I used:

 

[Macman]

^^ Do you have the Stainless works headers installed as well?

 

[NickPic83]

is that other pipe closed or open ended? is it just pipe or is there something in it?

 

[RV-Junke]

Still No Drone...

Yes, on the SW Full Header with High Flow CATS, X Pipe and Dual exhaust all in 3" Thermal Black...AWESOME sound Wide Open, and an awesome grumble at idle...even better now with the resonator pipe...

Yes the pipe is capped on the end, and there is NOTHING in it...just a 3" 90 degree (short), and pipe with a cap...NO insert at all. The drone is 100% frequency that needs to be canceled.. It really is amazing how it worked.

I would so recomend this to anyone with a drone! Just figure the length you need.

 

[Macman]

Good to know about the drone as it would be my top choice for an exhaust system. How bad was the drone?

 

[MotuMute]

My 40 didn't drone enough - so I went with a Super 10 and a Y-pipe for open exhaust note offroad!

 

[Wilson]

Helmotz resonator was correct on what the fix was...thanks! After a ton of looking around and a few calculators, I figured a 29" pipe would solve the almost un-drivable drone at 1,500 - 1,900 rpm's, specifically in 4th - 6th gear...worked out to about 45 - 60 mph.

Found a shop in Linden AMS Autowerks, Diogo is the owner to do the work...The shop is amazing, as these guys seem to know more about cars and how to fix things than anyone I have ever met...

Diogo and his crew got my "X" pipe off, and welded 2-3" Tubes 29" long...and amazingly it canceled the Drone 100%...really amazing! My wife likes to drive in the truck again!

View attachment 24621

View attachment 24622

View attachment 24623

Sorry for the poor quality of the photos...For those thinking there is no hope...there is! BTW, the Stainless Works Headers and Exhaust sounds even more bad-ass than before!

Here is the calculation I used:

View attachment 24624

The thing about putting up exhaust pic's is we need video to. I like to hear what I'm looking at.