Muffler flow comparisons.

[493 Mike]

493 Mike, all I see is Mustang parts

They offer universal mufflers in multiple diameters and lengths.
Mike

 

[71Beeper]

There was a study done by the University in Michigan comparing flow rates in various mufflers.
The car used for the testing was a 1970 Road Runner with a 383.
I think the an article was written in Mopar Action magazine some time ago.
Anyway, here are the results of the testing.

 

[493 Mike]

I guess I'd better sell the Flowmaster 50's!
Mike

 

[71Beeper]

Too bad their testing never included any of the higher end muffler like Corsa or Borla.
It would be interesting how they would have performed.

 

[rumblefish360]

Yea that wold have been nice along with a few other mufflers out there, BUT, I bet the collage kids themselves paid for the mufflers. Each kid brought in what he thought was "The Bad *** muffler, the one to use." and perhaps later installed it on there rides.... perhaps not in the case of the flow masters... LOL!

I had always recomended the Chambered Hookers, the Dyno Max turbo's and the Hooker or Dyno Max, max flow mufflers, dependent on the sound you lie. Since each is a different muffler. The one I didn't see was the Thrush turbo muffler. They were very popular in the 70's and 80's until the Flow Master came out.

I Currently run the Aero Chambers on my big block street Duster. (Nothing fancy....)
The Dyno Max turbo's on my Magnum. I swapped out the VT's. Not my cup of tea. Good for the track. They remind me of the Max Flows but only with a flap for quite idle and low rpm cruise.

 

[RobP]

Glad I changed out my Flowmasters for Ultra-Flow welded! The Flowmasters droned way too much for me!!

 

[PRND21]

Glad I changed out my Flowmasters for Ultra-Flow welded! The Flowmasters droned way too much for me!!

I've been looking at these, how do they sound? I never really cared for the flowmaster sound.

 

[RobP]

I've been looking at these, how do they sound? I never really cared for the flowmaster sound.

They actually sound like the flowmasters that I replaced, only a little mellower and a lot less droning. I still have a mild drone at a certain rpm, but it's tolerable.

 

[ray230]

They actually sound like the flowmasters that I replaced, only a little mellower and a lot less droning. I still have a mild drone at a certain rpm, but it's tolerable.

I did the same today. And I agree with your comments 100%. 1800 to 2000rpms the flow masters were hard to take. Dynomax ultras have a similar sound just toned down a bit.