New mufflers choice - The 1947 - Present Chevrolet & GMC Truck Message Board Network

OregonNed · 08-12-2020, 02:47 PM

I'm going to make the move to better, less loud mufflers on my truck. When it comes to a choice, how does the Dynomax Super Turbo compare to an equivalent Magnaflow? I'm having it done by a shop - still waiting to see which, if not both brands are available for install. I know for sure Magnaflows are listed on their webpage as an option. Thank you

**tdangle** · 08-12-2020, 02:58 PM

I have 2 1/2" dynomax mufflers on mine with tailpipes exiting at the rear under the bumper. Still fairly loud but sounds great. I've actually been thinking about this, maybe a stock type muffler such as what comes on challengers with the big hemi's. They are fairly quiet but still allow almost 500 hp.

Ziegelsteinfaust · 08-12-2020, 03:13 PM

Exhaust/engine total noise is directly tied to compression. Either static or dynamic. This gives off the hard thump or snap.

Certain types of mufflers like Flowmaster accentuate the sound, and make it more apparent. Which is why they are a popular muffler.

Magnaflow or Borlas in long cases actually quell exhaust better with less hp/tq loss. Add in a shorter muffler or resonator, and you can have a very quiet car or Burb. Yet still have a nice sound when you goose it.

Non the less case volume has more to do with sound attenuation as a general statement. So depending on how much sound you want to loose I would start with either larger mufflers, and or adding resonators near the tips. Both increase volume of the system.

OregonNed · 08-12-2020, 04:41 PM

Thanks for the replies.. I'm definitely wanting it to be quieter at idle, with a nice aggressive sound under throttle. My '66 was like that. Being so loud gets tiring on long drives..

Stover93 · 08-12-2020, 04:50 PM

Keep us posted on your results. I'm getting ready to install exhaust on my project soon. Thanks

**Already Gone** · 08-12-2020, 06:14 PM

Wish I could post video of mine running on here. I have Dynomax Super Turbos and wanted the same sound as you ,quiet at idle and open p at acceleration and nice purr when driving. If you want to PM me an email address or a cell number i'll send the video.

OregonNed · 08-12-2020, 06:39 PM

Quote:

Originally Posted by Already Gone

Wish I could post video of mine running on here. I have Dynomax Super Turbos and wanted the same sound as you ,quiet at idle and open p at acceleration and nice purr when driving. If you want to PM me an email address or a cell number i'll send the video.

Hey thank you, will do.. Ned

OregonNed · 08-12-2020, 06:41 PM

Quote:

Originally Posted by Stover93

Keep us posted on your results. I'm getting ready to install exhaust on my project soon. Thanks

absolutely - I sure will!

Mike C · 08-12-2020, 07:21 PM

I have the Dynomax 20" case SuperTurbos that used to be called Hemi turbos on my Jimmy. They sound great, don't hurt power and are quiet compared to everything else performance muffler wise.

I like them enough I bought a second set for my short step when the 427 goes in.

**70cst** · 08-13-2020, 08:32 AM

I have Spintech

Here is a clip

https://www.youtube.com/watch?v=K1LXf66LGaY

phlegm · 08-13-2020, 08:38 AM

I have some flowmaster knockoffs and have been really happy, I know a couple of other people who have the same ones. Sound great, limited drone in the cab, drop it to 2nd and people put their head on a swivel when cruising in town. I was on a budget, but I am happy with the sound. There is a video someplace if your interested.

https://www.amazon.com/TOTALFLOW-515...a-882472867607

**MJN** · 08-13-2020, 08:41 AM

I've got the Dynomax Super Turbo's on my K20, 2 1/4 in/out, been on my truck for about 15 years or so and still sound good. Mine exits behind the rear wheels on each side and the larger tips mellowed it out some too so its not snappy under acceleration. Low rumble at idle and quiet while cruising. I have a video of mine at idle too if interested.

brianc636 · 08-13-2020, 04:59 PM

I've ran Dynomax Ultra Flo's in the past and that is what is on my new Sierra with the 6.2. It's not overly loud going down the road but at start up and when you mash the loud pedal, it lets you know it's there. For reference, it's also 3.5" piping in and out with it splitting to 2.75" duals over the axle.

OregonNed · 08-14-2020, 07:53 PM

I called and set up an appt next week for DynoMax Super Turbos. Will report back after the install. I’m running before and after decibel tests to see how it pans out.

08-12-2020, 02:47 PM	#1
OregonNed Registered User Join Date: Dec 2012 Location: Vancouver, Washington Posts: 1,644	New mufflers choice I'm going to make the move to better, less loud mufflers on my truck. When it comes to a choice, how does the Dynomax Super Turbo compare to an equivalent Magnaflow? I'm having it done by a shop - still waiting to see which, if not both brands are available for install. I know for sure Magnaflows are listed on their webpage as an option. Thank you __________________ 1968 Chevrolet C/10 LWB - 327, TH350 - 4/5 Drop

08-12-2020, 02:58 PM	#2
tdangle Senior Member Join Date: Mar 2005 Location: Jurupa Valley, Ca Posts: 1,209	Re: New mufflers choice I have 2 1/2" dynomax mufflers on mine with tailpipes exiting at the rear under the bumper. Still fairly loud but sounds great. I've actually been thinking about this, maybe a stock type muffler such as what comes on challengers with the big hemi's. They are fairly quiet but still allow almost 500 hp. __________________ Terry 1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC

08-12-2020, 03:13 PM	#3
Ziegelsteinfaust Registered User Join Date: Dec 2012 Location: Temple City Posts: 3,558	Re: New mufflers choice Exhaust/engine total noise is directly tied to compression. Either static or dynamic. This gives off the hard thump or snap. Certain types of mufflers like Flowmaster accentuate the sound, and make it more apparent. Which is why they are a popular muffler. Magnaflow or Borlas in long cases actually quell exhaust better with less hp/tq loss. Add in a shorter muffler or resonator, and you can have a very quiet car or Burb. Yet still have a nice sound when you goose it. Non the less case volume has more to do with sound attenuation as a general statement. So depending on how much sound you want to loose I would start with either larger mufflers, and or adding resonators near the tips. Both increase volume of the system.

08-12-2020, 04:41 PM	#4
OregonNed Registered User Join Date: Dec 2012 Location: Vancouver, Washington Posts: 1,644	Re: New mufflers choice Thanks for the replies.. I'm definitely wanting it to be quieter at idle, with a nice aggressive sound under throttle. My '66 was like that. Being so loud gets tiring on long drives.. __________________ 1968 Chevrolet C/10 LWB - 327, TH350 - 4/5 Drop

08-12-2020, 04:50 PM	#5
Stover93 Registered User Join Date: Jun 2019 Location: Shawnee, KS Posts: 127	Re: New mufflers choice Keep us posted on your results. I'm getting ready to install exhaust on my project soon. Thanks

08-12-2020, 06:14 PM	#6
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,073	Re: New mufflers choice Wish I could post video of mine running on here. I have Dynomax Super Turbos and wanted the same sound as you ,quiet at idle and open p at acceleration and nice purr when driving. If you want to PM me an email address or a cell number i'll send the video. Attached Images __________________ 1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021

08-12-2020, 07:21 PM	#9
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,709	Re: New mufflers choice I have the Dynomax 20" case SuperTurbos that used to be called Hemi turbos on my Jimmy. They sound great, don't hurt power and are quiet compared to everything else performance muffler wise. I like them enough I bought a second set for my short step when the 427 goes in. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

08-13-2020, 08:32 AM	#10
70cst Senior Member Join Date: Feb 2001 Location: New Madison, Ohio Posts: 21,339	Re: New mufflers choice I have Spintech Here is a clip https://www.youtube.com/watch?v=K1LXf66LGaY __________________ A husband can be right...or...A husband can be happy. 67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk. 1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder!

08-13-2020, 08:38 AM	#11
phlegm Still Green but learning Join Date: Nov 2004 Location: Central NC Posts: 1,895	Re: New mufflers choice I have some flowmaster knockoffs and have been really happy, I know a couple of other people who have the same ones. Sound great, limited drone in the cab, drop it to 2nd and people put their head on a swivel when cruising in town. I was on a budget, but I am happy with the sound. There is a video someplace if your interested. https://www.amazon.com/TOTALFLOW-515...a-882472867607 __________________ -- Cory 71 Cheyenne 10 - SWB, 350, "3 on the tree" AC cab 07 Suburban LTZ 4x4 2010 Acura TL 98 Mastercraft "FrankenStar" 225 27253 UPS/USPS IIOY....nope never was

08-13-2020, 08:41 AM	#12
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 2,958	Re: New mufflers choice I've got the Dynomax Super Turbo's on my K20, 2 1/4 in/out, been on my truck for about 15 years or so and still sound good. Mine exits behind the rear wheels on each side and the larger tips mellowed it out some too so its not snappy under acceleration. Low rumble at idle and quiet while cruising. I have a video of mine at idle too if interested. __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com

08-13-2020, 04:59 PM	#13
brianc636 Registered User Join Date: Aug 2020 Location: Springfield, Missouri Posts: 14	Re: New mufflers choice I've ran Dynomax Ultra Flo's in the past and that is what is on my new Sierra with the 6.2. It's not overly loud going down the road but at start up and when you mash the loud pedal, it lets you know it's there. For reference, it's also 3.5" piping in and out with it splitting to 2.75" duals over the axle.

08-14-2020, 07:53 PM	#14
OregonNed Registered User Join Date: Dec 2012 Location: Vancouver, Washington Posts: 1,644	Re: New mufflers choice I called and set up an appt next week for DynoMax Super Turbos. Will report back after the install. I’m running before and after decibel tests to see how it pans out. __________________ 1968 Chevrolet C/10 LWB - 327, TH350 - 4/5 Drop



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