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  #31 (permalink)  
Old 05-22-2013, 03:54 PM
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Most of the muffler shops here in the DFW area use a single dual in\dual out muffler on pickups. From what I hear the Magnaflow is the muffler with the least amount of drone and the Flowmaster has the most drone.

So is a single better than dual mufflers?

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  #32 (permalink)  
Old 05-22-2013, 06:53 PM
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I bought the cheap Summit brand turbo mufflers and figured at $20 ea. I'd toss them if they weren't any good. I love them, and ended up buying a 2nd pair for my last project too.
A friend gave me a pair of Flowmaster mufflers he took off his car a couple months ago. No idea what "series" they are. I was planning on using them on my current build, but now I'm not sure I want to with all the talk of them being too noisy.
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Old 05-22-2013, 07:17 PM
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If your friend is taking them off, they are probably the 40 series. I am taking mine off...
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  #34 (permalink)  
Old 05-22-2013, 07:19 PM
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Are they marked someplace as to what they are?
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Old 05-22-2013, 07:28 PM
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Not that I know of.
Best to hang them on the exhaust without clamping too tight and see if they are too loud before you make the install permanent
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Old 01-18-2014, 11:17 AM
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Quote:
Originally Posted by F-BIRD'88 View Post
Look at the modern mufflers design on the new cars like the Camaro and Hemi Challenger etc
for inspiration. Lots of power- low noise.
Can you describe what they do? I know that they tune the whole chamber, which is why a lot of them have odd shaped mufflers, but have never had the opportunity to see what's inside.

That said, OEM's have done some pretty decent mufflers for years (in general, especially GM has done really well with their stock exhausts, for example, their 20y/o cats are pretty much what is now sold as high flow cats). On my '97 TA I wasn't able to show any advantage going from a stock muffler to open pipes even running high 11's.

Quote:
I build my own custom built mufflers. They are a unique internally modified version of a "turbo muffler"
More power, more flow, very reasonable idle and cruise sound. No interior resonance or annoying drone like a Flowmaster. Aggressive when you stand on it. But all that sound is at the back of the car, not in or under the car (annoying)
I start with a cheap common "California Boss Turbo" muffler ($20) and improve it internally (a lot )
Any pics/more description what you did?
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Old 01-19-2014, 02:13 PM
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Put the old 2 chamber flowmasters on a 1974 350 vette with hooker headers and 2 1/2" pipes. They sound great and are in great shape nearly 15 years later. Not sure of the series but about ten years ago put a set of 3 chamber flowmasters on a 1972 c10 with 2 1/4 pipes and headers,,,,,,,,hate them,,,,no cool sound. Wish I knew what series the 2 chamber mufflers were, want another set.
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  #38 (permalink)  
Old 01-19-2014, 04:19 PM
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Quote:
Originally Posted by highvolt View Post
Put the old 2 chamber flowmasters on a 1974 350 vette with hooker headers and 2 1/2" pipes. They sound great and are in great shape nearly 15 years later. Not sure of the series but about ten years ago put a set of 3 chamber flowmasters on a 1972 c10 with 2 1/4 pipes and headers,,,,,,,,hate them,,,,no cool sound. Wish I knew what series the 2 chamber mufflers were, want another set.
The VX series are two chamber design, as are the 40 series.
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  #39 (permalink)  
Old 01-22-2014, 06:46 AM
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Sounds to me like the thing you need first and foremost is a balance tube...anytime you have two separate exhaust pipes you need a balance tube connecting them together...its just a piece of exhaust pipe usually just after the headers that connects the two pipes balancing them out....An X pipe is the same thing but not quite as good ,being the connection is farther back...and its always in the way.
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  #40 (permalink)  
Old 01-22-2014, 10:20 AM
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LAtech is master , and am sure by now has a solution. ..

Most mufflers you are accustomed to hearing on road have fiberglass packing lining the muffler.

If you don't use a glasspack with a fully welded muffler design, it will sound harsh.

Most high performance vehicles / not race cars , From the factory came this way, Resonator glasspack then hi flow turbo muffler.

Placing the glasspack in series with a turbo muff works well, and has almost no effect on backpressure. No system that I measured ever went over about 1.5-2 psi on the manometer back pressure gauge. Around 2 psi is where you will start effecting dyno power output.

Pic of the muffler layout of the stock 440 cuda-
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  #41 (permalink)  
Old 01-22-2014, 10:32 AM
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Look at the bolt on kit on my integra. Skunk2, follows the factory design again. Series glasspack and muffy.

If you go 40's , bullets, open straights, your apartment / condo association can/will vote your butt out. Your lease can be terminated, no refund on deposit. You will be on the streets, homeless, because you wanted to drive to work sounding like a racecar. ha.
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  #42 (permalink)  
Old 01-22-2014, 12:45 PM
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Quote:
Originally Posted by spinn View Post
LAtech is master , and am sure by now has a solution. ..

Most mufflers you are accustomed to hearing on road have fiberglass packing lining the muffler.

If you don't use a glasspack with a fully welded muffler design, it will sound harsh.

Most high performance vehicles / not race cars , From the factory came this way, Resonator glasspack then hi flow turbo muffler.

Placing the glasspack in series with a turbo muff works well, and has almost no effect on backpressure. No system that I measured ever went over about 1.5-2 psi on the manometer back pressure gauge. Around 2 psi is where you will start effecting dyno power output.

Pic of the muffler layout of the stock 440 cuda-
Good example....Note the balance tube...
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  #43 (permalink)  
Old 01-22-2014, 12:54 PM
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Something like this is my choice. 5" O.D., 3" in and out and 35" length......
http://www.summitracing.com/parts/jex-a5030s/overview/
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