Wife says she needs Earplugs!

[Woody'sScamp]

Hi all. I need your expertise on "droning". It doesn't bother me too much because I love the car, but my wife says she wants earplugs, and she's a car lover, maybe my classic car lover? From 20 to 90mph (WOT) it's fun! No problems there.
I'll try and provide everything I know about the engine rebuild and exhaust system. From about 30 to 40 major droning, up to about 2K RPM, driving around the town and countryside, city, hit the gas it's gone.
Here's what I have.
Car - 1975 Valiant Brougham 2- door
Rebuilt 1975 318 - (only 32,000 miles, but I wanted more than that "smog engine") .30 over with iron 340 heads, not sure if X or J", worked on a little bit" is what I'm told!
The Engine with headers dyno'd at 404HP (at 5,5500), 419 TQ (at 4,100)
Cam - Comp XR280HR-10 (2,2200-6,000rpm)
Manifold - LD4B
Holley - Dominator? Carb 750
Trans - Rebuilt 904 2,500 stall.
Exhaust manifolds - 72-73 340 manifolds
Exhaust - 2 1/2" TTI head pipes, full TTI exhaust with turn downs out the back, Dynomax Turbo mufflers. (The standard TTI kit.)
8 1/4 rear end with 3:55 sure grip.
Back Tires - 245/60/15

Will putting Exhaust Tips out beyond the bumper help or not? Different mufflers? Suggestions please.

Thanks all.

 

[Dana67Dart]

get up to speed with the drone there, put the car in neutral, does the drone go away?

 

[MomsDuster]

Had a Ranchero back in the day with a hellacious drone, H pipe solved that.

 

[33IMP]

H pipe?
Do you have room for bullet style resonators in the tailpipes?
Find out what rpm the drone occurs at.
(I may be wrong, but I don't think tips will help.)

Mom's Duster post while I was typing.... slowly.lol.

 

[RustyRatRod]

You need different mufflers. Those are bad about that.

 

[TT5.9mag]

Look up Helmholtz resonators.

 

[RustyRatRod]

Look up Helmholtz resonators.

For that kinda dough, they better come with a really high end call girl to install um for me and then give me a happy ending.

 

[TT5.9mag]

For that kinda dough, they better come with a really high end call girl to install um for me and then give me a happy ending.

Lol. My point was really just to point out that you can do some math and build a Helmholtz resonator with just a couple of U bends and some exhaust tubing.

 

[circlepilot]

Drive shaft balance.

 

[Lord Sparky]

Simplest answer not listed.

 

[TT5.9mag]

Simplest answer not listed.

New wife?

 

[Lord Sparky]

You said it, not me. I was just kidding by the way. My wife approved and dickered for our Dart.

 

[3forty]

For that kinda dough, they better come with a really high end call girl to install um for me and then give me a happy ending.

 

[Scody21]

Earplugs. A buck or less and done…

 

[dadsbee]

 

[Unconventional]

Granbrat Birkyyy But we were at Wild West Shootout at Arizona Speedway with Late Models and Modifieds

 

[fishmens67]

Hooker Aero chamber.

 

[fishmens67]

or get her some ear plug music playing some Al Green, makes for a good time when you get home. lol

 

[Woody'sScamp]

All,
Love the pics and comments! So, I forgot to mention, brand new balanced driveshaft, and I have the TTI x-pipe. Any other muffler suggestions I should look at? Aren't the Dynomax Turbos the quieter mufflers? I would go for louder as long as I get rid of that low-speed drone.
(Hooker Aero chamber - I'll look these up)