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#1 |
Registered User
Join Date: Jul 2003
Location: Cypress, Tx
Posts: 4,005
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Need a Quiet exhaust for 402.
I know, sounds cheezy, but... My wife is on board with me finishing up the '72 Burb and making it her DD. However, it currently has dual 2.5" exhaust with Dynomax Mufflers. It is way too loud for her (and me on the hiway). Maybe I'm getting old
![]() Shawn
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1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE |
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#2 |
Senior Member
![]() Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,365
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Re: Need a Quiet exhaust for 402.
http://www.spintechmufflers.com/mufflers/cat_12.html
Boy do I have a small surprise To spring on you tonight Go to the link above and you will find mufflers that will have various sounds. I would give them a call. http://www.spintechmufflers.com/muff...es/cat_25.html I have the above muffler...Good luck.
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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! Last edited by 70cst; 02-12-2010 at 11:47 PM. |
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#3 |
Between Trucks...
Join Date: Mar 2002
Location: Los Angeles, CA.
Posts: 3,830
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Re: Need a Quiet exhaust for 402.
I'm running Summit Turbos, nice mellow rumble.
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Beat it to fit, Paint it to match... ![]() |
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#4 |
Senior Member
Join Date: Sep 2004
Location: Wakaw, Sask, Canada
Posts: 3,180
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Re: Need a Quiet exhaust for 402.
What kind of Dynomax? I had dynomax super turbos on a 5 litre mustang and they were so quiet you could hardly tell it was a V8.
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"You can take the man out of PA, but you can't take PA out of the man" Last edited by HeavyD; 02-13-2010 at 12:11 AM. |
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#5 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Need a Quiet exhaust for 402.
About the only way you can get the 'right sound' will be to listen to others stuff and find out what they have. Something mellow to me, is my neighbors worst nightmare.
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#6 |
Senior Member
![]() Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,365
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Re: Need a Quiet exhaust for 402.
Very very good point. Thats how I selected the Spintechs. I heard them on a BB 396 and knew they were the ones for me.
__________________
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! |
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#7 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Need a Quiet exhaust for 402.
generic parts store turbo mufflers with a very short glasspac in line with it should quiet it down for a pretty reasonable price
or just use what you have and add a 14'glasspac aftyer the mufler they're cheap about 25each
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY Last edited by cdowns; 02-13-2010 at 01:24 PM. |
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#8 |
Rottenwood Garage Member
Join Date: May 2005
Location: Marietta, Georgia
Posts: 4,321
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Re: Need a Quiet exhaust for 402.
I used the same as you and they were way too quet. I think they only sound good with headers and I dont use them. My buddy has them on his with headers and they are completely different sounding.
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2004 Chevrolet Suburban C1500 2001 Chevrolet 2500HD Crew 6.0 1999 Harley Davidson Electra Glide 1972 Chevrolet C-20 Custom Camper "Dump Truck" 1972 Chevrolet C-20 Suburban "Big Green" 1969 Chevrolet C-50 Wedge Hauler "Leonidis" 1966 C-10 2x4 short fleet 327 4 speed "Race Truck" 1952 Plymouth Cranbrook "Rican" (my grandfathers) 1931 Ford Model A Coupe "Black Beauty" 1930 Ford Model A truck "Club Cab" 4x4 Rottenwood Garage and Speed Shop.....where everything must be racy! It's not just a hobby..It's a LIFESTYLE!!! Thanks for nothing Barrett-Jackson You cant fix stupid or teach accountability! Time wasters, looky Lous and tire kickers are everywhere! |
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#9 |
Registered User
![]() Join Date: Apr 2000
Location: Bradenton, FL
Posts: 1,036
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Re: Need a Quiet exhaust for 402.
Believe it or not but Im running Midas stock ones. We use the truck for business and drive it all over the country. I really didnt want quiet but my wife did. I am so glad I did. On the inside it is as quiet as a new truck. Way quieter then my 06 Ford diesel. Nice on the long drives. On the outside my 3 sons say it sounds great, they love the sound. It is way to quiet for me but if it was loud, that would have gotten real old after a couple of hundred miles. I have generic turbo's on a small block and my kids say it sound like a boat. The reason I went with Midas was because if I had a muffler problem it would be covered anywhere in the country. Good Luck.
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1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters |
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#10 |
Registered User
Join Date: Jun 2002
Location: central pa
Posts: 1,525
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Re: Need a Quiet exhaust for 402.
I am running 2 mufflers off a 4.3l s10 sound good to me. If you want to add some more rumble open the tail pipes up to 3" for the last 3 feet.
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72 longhorn c30 502BB/th400/fact air/4.11rear/ custom camper 72 bug(the better half's) under reconstruction 2009 HHR aqua blue 71 GMC k20 350/sm465 2009 Chevy hd3500 6.6 Victory Red crew cab dually Dave & Jeanne |
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#11 |
Senior Member
![]() Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,365
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Re: Need a Quiet exhaust for 402.
This is great how this site helps everyone out..I don't care if it's Winter, spring, summer, or fall, All you got to do is call...and we come a running...well some of us has to walk but we offer help and suggestions. You guys rock!!!
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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! |
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#12 |
Registered User
Join Date: Sep 2005
Location: Canton North carolina
Posts: 3,079
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Re: Need a Quiet exhaust for 402.
I have a set of flowmaster bb mufflers on my stock 402 and it is pretty quiet, they do not sound like regular flows that is for sure, but they take up quiet a bit of room.
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67 blue step side- bb 68 gold and white swb cst anniversary 68 custom swb hot rod Ls swap 69 swb cst 6 cylinder/ overdrive 69 black/black cst bb swb 70 orange and white cst Canada built truck swb bb 71 black and white super swb bb 71 red and white super swb 72 green and white super swb 4x4 62 nova wagon 400 series Ls swapped 68 Camaro 327/4 speed- 1 owner, original paint 66 Volkswagen bettle 69 auto stick Volkswagen Beetle |
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#13 |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,721
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Re: Need a Quiet exhaust for 402.
DynoMax Hemi Turbos. They have a nice tone and are exceptionally quiet, LONG case. And affordable at about $55 each.
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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 |
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#14 |
Registered User
Join Date: Aug 2007
Location: Bakersfield, Ca
Posts: 538
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Re: Need a Quiet exhaust for 402.
Is there such thing as a quiet 3in muffler?
I have 2 tiny 2 1/2in mufflers right after the headers merging to a single 3 chamber (longer version) 3in flowmaster that dumps right before the rear axle as it's too low to really go over the rear axle. I understand this may explain a lot of the noise too. |
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#15 |
Registered User
Join Date: Jul 2003
Location: Cypress, Tx
Posts: 4,005
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Re: Need a Quiet exhaust for 402.
Thanks for all the help so far guys! 70cst, that is exactly why I love this sight, and always will. Believe it or not, I checked the numbers and it has Dynomax Super Turbos 17734 with 2 1/2" offset inlets and outlets. They really are tucked nicely up there, but they are just really loud on the freeway. Of course I do drive about 70 or so with the 3 speed auto and pretty stout 3/4 ton rear gears if I'm not mistaken (not sure of the ratio though).
I had the Spintechs on my '91 SWB Reg cab S10 with 96 Corvette LT1 with 6 speed tranny in it when I was younger. I LOVED the way it sounded. Nice and mellow at idle and cruising, but nice and crisp when throttle was punched. I think the problem is mainly the noise inside the cab is so loud. Even with sound deadener (Raam Mat) on top, bottom, and sides and carpet its loud. We live in the city and my driveway runs up the side of the house. There is only about 10 feet to my neighbors bedroom windows. She and her daughter have never complained, but I know it must be annoying when I have to get up on a Sat or Sun to go to work at 5:00 A.M. and the truck is blasting at high idle to warm up. When the hurricane was here a couple of years ago and I was idling through the neighborhood right after my neighbors said they knew it was me just by the rumble of the Burb coming down the street. Like I said, we are not trying to be old fogeys, but I gotta get the sound level under control, or my wife won't use it as a Daily Driver. What if I ran a cheap glasspack inline before the mufflers, would that act as a resonator and tone them down a little? Has anyone ever used Borlas? I know they are pretty expensive, but they evidently have a pretty tame sound. What about the Spintech RV? Thanks for the advice and opinions so far! I really do appreciate them. Shawn
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1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE |
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#16 |
Registered User
Join Date: Jul 2003
Location: Cypress, Tx
Posts: 4,005
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Re: Need a Quiet exhaust for 402.
Sorry Cdowns, Just read what you wrote again. So the glasspacks would help. I hate to spend money unless I need to. What exactly do they do to help after the mufflers?
Shawn
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1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE Last edited by jorgensensc; 02-13-2010 at 04:55 PM. |
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#17 |
Senior Member
![]() Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,365
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Re: Need a Quiet exhaust for 402.
jorgensensc ... Spintech has all flavor of sounds. They do have a series of mufflers that have the deep mellow sound but not noticable at highway speeds. I would recommend that you call them. Thats what I did before I settled on mine...even though I sort of knew what I wanted. They were very helpful in discussing the types of mufflers that they had. You have been given lots of great ideas. Good Luck
__________________
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! Last edited by 70cst; 02-13-2010 at 05:03 PM. |
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#18 | |
Registered User
![]() Join Date: Jan 2008
Location: St.Petersburg,Fl
Posts: 1,267
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Re: Need a Quiet exhaust for 402.
Quote:
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#19 | |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Need a Quiet exhaust for 402.
Quote:
theyd absorb sound // was pretty common on luxury cars like caddy and lincolns to have two mufflers in series back in the day of the bigblock//i figure the glasspoacks wont add much restriction but quiet things a bit//we used to do it on our streetracers back when i was young so as to not advertise another thing that might quiet it down is to just move the muffler further bach tword the rear of the truck,that might cut the harmonics down and quiet it down on the hiway
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY Last edited by cdowns; 02-14-2010 at 06:31 AM. |
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#20 |
Registered User
Join Date: Feb 2006
Location: Smyrna, Ga
Posts: 1,647
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Re: Need a Quiet exhaust for 402.
i was looking for a muffler that wasnt too loud, but didnt loose the "muscle car" feel.
i just put these on mine. they are similar to spintechs as far as construction, but they are smaller, quieter, and have a completely different sound. there is no resonation in the cab at any speed. it never gets obnoxious. its more of a sound you feel. i can try to get you a sound clip. summits had the stainless ones on sale for awhile now. http://www.summitracing.com/parts/EDL-55752 |
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#21 |
Registered User
Join Date: Mar 2005
Location: 10-Uh-See
Posts: 5,609
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Re: Need a Quiet exhaust for 402.
The 70 series Flowmasters have a very low tone to them. They are designed for BB engines and SUV's. They're not "stock quiet" but they're not loud either. They still have a deep throaty rumble. I've only heard about 2 vehicles with these on them.
I also had a set of 50 series Delta Flow Flowmasters on my old 86. It was a nice mellow tone at idle and cruise, and would still talk at WOT.
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#22 |
Registered User
Join Date: Sep 2005
Location: sc
Posts: 1,203
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Re: Need a Quiet exhaust for 402.
Magnaflow!
I am running 2.5" duals and 22" mufflers on mine and at idle it is too quiet but it sounds good when the throttle is opened up. I should have went with some 18" mufflers...oh well. But if Magnaflows interest you I normally ship them cheaper than Summit does.
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71 Cheyenne C10 LWB cam'd 6.0/T56 Swap |
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#23 |
Registered User
![]() Join Date: Jul 2009
Location: Houston, Tx
Posts: 1,133
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Re: Need a Quiet exhaust for 402.
x2 on the magnaflows i have had them on my heads and cam 5.3 silvy with no cats (only 325 cu) but it was great for long distance and you knew it wasnt stock when i hit it
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1972 SWB Medium Olive South Houston Instagram: Antbish84 |
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