Report - Dynomax VT mufflers

[mhjo]

1. They are almost totally silent at cruising
2. They do not drone at any rpm
3. They scream like a cat when you rev up


I think Dynomax haave done some reseach on noise cancelling (especially bass cancelling). The sound has a significant bass cut on idle compared to Super Turbos.


Possible drawbacks:

1. You will start hearing all sorts of sounds from the mechanical devices in your car

2. You might fall asleep while driving



Note: They are more silent than the Super-Turbos I had previously, both in 2 and 2+1 (transverse) muffler setups.

Note 2: I still have the rear resonators on tailpipes

 

[PoppyMod]

1. They are almost totally silent at cruising
2. They do not drone at any rpm
3. They scream like a cat when you rev up


I think Dynomax haave done some reseach on noise cancelling (especially bass cancelling). The sound has a significant bass cut on idle compared to Super Turbos.


Possible drawbacks:

1. You will start hearing all sorts of sounds from the mechanical devices in your car

2. You might fall asleep while driving



Note: They are more silent than the Super-Turbos I had previously, both in 2 and 2+1 (transverse) muffler setups.

Note 2: I still have the rear resonators on tailpipes

Hi,
Thanks for the report. However, you left out another "draw-back".....
You can actually hear the tune box! LOL
Happy motoring!

 

[Realmongo]

Okay, we're all waiting for the sound clips!

 

[JonK]

I'd like to hear some clips also, in park revving until the flap opens for straight through. About what RPM does the flap open?
Jon

 

[mhjo]

I'd like to hear some clips also, in park revving until the flap opens for straight through. About what RPM does the flap open?
Jon

I will se if I caan make some sound clips and also check the rpm/opening this weekend.

 

[2+2GT]

There are other ways to do that. A reproduction of a controllable muffler from the musclecar era can be switched loud/quiet from the dash.

 

[mhjo]

Who makes that? What's it called?

 

[gjz30075]

I'd like to hear a sound clip from inside the car, cruising. Then hit the throttle!

 

[mhjo]

You don't hear that much from inside. After I replaced shorty headers with Hipo manifolds and mufller, the sound really comes out behind the car and less inside.

But when I record the sound, I will try to record both inside and outside.

 

[65ShelbyClone]

There are other ways to do that. A reproduction of a controllable muffler from the musclecar era can be switched loud/quiet from the dash.

http://waldronexhaust.com/cart/images/DCE actuator end angle view2.JPG

Those are pretty cool. I was going to go with electric cutouts, but at least those aren't so blatantly illegal in "loud" mode. At the same time, they list the volume at 2200+rpm as being 99-100db. 96db is the legal limit here.

Who makes that? What's it called?

Waldron's Exhaust, car exhaust, truck exhaust, exhaust pipes, mufflers

 

[bocksta]

I've been looking at getting these mufflers for awhile.They seemed to have some trouble with the internal flap in the first batch ,but from all the latest reviews that's no longer a problem.
looking forward to seeing/hearing the video. Maybe you could give us a WOT drive by

 

[2+2GT]

Who makes that? What's it called?

Waldron. It's a copy of the 67-70 Pontiac Vacuum Operated Exhaust. Aside from the repro, they also make them in other pipe sizes.

69 Firebird with 12 inch DCE 2009.10.02.wmv - YouTube

 

[mtaqua]

sound clip, finally!

Andrew Tacquard's Videos | Facebook

I don't think draw back number 1 or 2 applies for me, I can barely hear myself talk at idle. I am glad I didn't get some louder mufflers. These are with 3" and an x pipe. solid roller .672 lift about 260 duration at 50.

Oh yeah, there is nothing silent about mine.