5.4 IRONMAN'S Exhaust Build.

[MTUH3]

Ironman,

Let me know if you need help with the drone calculation. I have been trying to get my hands on a 5.4L to measure. Also, I think I can get a tube made / bent up for you at a decent price.

 

[IRONMAN]

Oops my bad my fat fingers hit the wrong symbol but I fixed it lol I also have a 5.4 so it wouldn't make sense to say that 6.2 is better..

I didn't use dyno mattig or anything like that I actually used a spray in rubber type sound deadening all in the cab but I also have to do the doors. The rubberized spray sound deadening seems to work a lot better cause you can layer it.

Interesting on the spray in. Yeah my floor is now extra EXTRA think and cushy lol

Ironman,

Let me know if you need help with the drone calculation. I have been trying to get my hands on a 5.4L to measure. Also, I think I can get a tube made / bent up for you at a decent price.

I may take you up on that offer on calculating the frequency if I need it, I should have plenty of extra pipe to do it.
Don't you have a 6.2?
Bought a kit through an online Mandrel Bending company with tons of pieces .lol

Tube Bending & Fabrication - Columbia River Mandrel Bending

Good stuff and not too bad in price.

 

[MTUH3]

Good link.

i have a 6.2L and we calculated the tube on my system to that engine. Been trying to get a 5.4L so we can offer a system for that engine too, with the correct drone tube length. What RPM does your worst drone start at, and go away at?

 

[IRONMAN]

Good link.

i have a 6.2L and we calculated the tube on my system to that engine. Been trying to get a 5.4L so we can offer a system for that engine too, with the correct drone tube length. What RPM does your worst drone start at, and go away at?

Starts really bad at around 65 mph and goes away around 80 mph.
So I drive very fast.

 

[MTUH3]

what RPM is that? An I know what you mean about the drone and driving fast or slow. I do that with my other truck. Speed dependent on comfort

 

[IRONMAN]

what RPM is that? An I know what you mean about the drone and driving fast or slow. I do that with my other truck. Speed dependent on comfort

Let me go take a drive and see. Not too sure.

 

[MTUH3]

Glad I gave you another excuse to take the truck out for a spin, not that you needed one....

 

[Ruger]

Yes sir, Ironman, I have the 6.2L. The 24 inch Magnaflow muffler (single inlet, dual outlets) shoehorned into the factory exhaust system (resonator still installed) is completely droneless. It's not louder than the factory exhaust system, just deeper in tone. It only calls attention to itself when you're deep into the throttle, and not any more than the factory muffler. Just deeper tone is all.

 

[dirtydeeds]

The simplest way to figure out the length of the quarter wave resonator is to use this calculator

Wavelength

Just figure out the frequency of the drone you're peaking out at, a simple audio analyzer app on your iphone will work just fine. Plug in the frequency to get the wavelength, then divide by 4 and that's the length of the 'drone tube'

Helmholtz math will generally make the tube a little longer and will be more effective. But the math is much more complicated, and you have to calculate the speed of sound in your exhaust system which varies depending on the temp.

That said, for 150 hz, which is what I'll assume your drone is going to come in at (probably 130-150 to be more exact, haha) try 26", just a hunch.

Shoot me a text if you want, I have helmholtz resonator caps cut out on a waterjet by the hundreds, i'll send you a few for free. You can easily make the tube adjustable using band clamps, but 26" works really well on Tundra's, Titan's, f150's and Silverado's.

 

[IRONMAN]

The simplest way to figure out the length of the quarter wave resonator is to use this calculator

Wavelength

Just figure out the frequency of the drone you're peaking out at, a simple audio analyzer app on your iphone will work just fine. Plug in the frequency to get the wavelength, then divide by 4 and that's the length of the 'drone tube'

Helmholtz math will generally make the tube a little longer and will be more effective. But the math is much more complicated, and you have to calculate the speed of sound in your exhaust system which varies depending on the temp.

That said, for 150 hz, which is what I'll assume your drone is going to come in at (probably 130-150 to be more exact, haha) try 26", just a hunch.

Shoot me a text if you want, I have helmholtz resonator caps cut out on a waterjet by the hundreds, i'll send you a few for free. You can easily make the tube adjustable using band clamps, but 26" works really well on Tundra's, Titan's, f150's and Silverado's.

Thanks, I'll keep this in mind.