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#1 |
Senior Member
![]() Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,702
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No tone
The guy who put together my dual exhaust on my 69 CST/10 did an outstanding job and it looks really great. The one thing missing I think is adequate muffler, but the tubing is bent and welded and mounted very nice. It goes straight out the back under the bumper. I have the truck's original 350 engine, rebuilt with stock setup.
When he was setting me up he was asking what sort of tone I want. I told him no tone at all, quiet as possible. He put what I think is glass packs on there. It does not look like what I view as a muffler, with an oval can shape, but rather looks like a larger round pipe a couple of feet long before going back to the smaller 2-1/2" pipe. It's somewhat loud and the drone is getting old. I see lots of posts (many many posts) in the forum where people talk about sound of the truck. Maybe I'm a stick in the mud or something and I apologize for that, but what I would really like is a truck like my Dad's 74 C-10 (or my Mom's 70 Cutlass) when it was new. You could barely even tell the engine was running. There was more noise coming from the radiator fan blades than the exhaust. I'm talking about completely quiet, no "tone". How do I get that? What mufflers do I install? |
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#2 | |
Registered User
Join Date: Mar 2016
Location: Puyallup, WA
Posts: 235
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Re: No tone
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#3 |
Registered User
Join Date: Jun 2014
Location: Lake Tapps Washington
Posts: 386
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Re: No tone
I have flowmaster 44's and at idle they are very very reasonable. Granted I have a 268 cam and longtubes. I would imagine with a bone stock motor, she would be fairly quiet. But as we all know we have different opinions. This is just mine! I have 1 3/4 pipe all the way back
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1967 Chevy CST 10 1969 Chevy C/20 Longhorn 1969 K10 Suburban 1972 Chevy Cheyenne Super 10 turned K30 (sold) ![]() |
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#4 |
Post Whore
![]() Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,115
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Re: No tone
I would go back to him and explain further what your looking for and have him fix the problem. No need to call yourself names, you like what you like. He probably thought that it was quiet, since lots of folks who get custom exhaust work go way over the other direction. You may want to look into some late model stock muffers to quiet things down.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. ![]() RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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#5 |
Registered User
Join Date: Feb 2016
Location: San Mateo
Posts: 199
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Re: No tone
Get the largest turbo muffler that you can fit in there. Dynomax used to sell a Hemi turbo muffler. I have had their super turbo mufflers on 3 different small blocks and they do gave a slight tone but you cannot hear the motor at cruise at all. At certain points in the rpm band the tone becomes audible but it for the most part was silent.
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#6 |
Registered User
Join Date: Apr 2008
Location: Md
Posts: 2,472
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Re: No tone
I had built a 2.5 dual stainless exhaust for my 350, X crossover and Flowmaster mufflers. The tone was OK but the drone was aweful, after several attempts to change the tone and loose the drone. I reverted to what would have been on the truck 40 years ago, I installed a Y pipe, and used the 2.5 stainless with both Flowmaster on 1 side. It is now quiet and and the drone is gone. Good Luck.
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#7 |
Senior Member
![]() Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,365
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Re: No tone
Maybe stay away from the specialty mufflers and go with a more standard exhaust muffler ...
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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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#8 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: No tone
Stop looking at these aftermarket performance mufflers everybody is suggesting and put a pair of stock replacement mufflers on. It's not magic, it's a muffler, and that stock (factory) sound is what you describe. Look into Walker brand for quality
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#9 | |
The Older Generation
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Location: Montezuma, Iowa
Posts: 25,485
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Re: No tone
Quote:
What he said^^^. Stock oval mufflers. The longer it is the quieter the sound.... I had full length exhaust with 40 knockoffs put on the '67 Panel Truck and the drone drove me crazier... ![]() LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#10 |
Registered User
Join Date: Nov 2016
Location: Albuquerque, NM
Posts: 110
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Re: No tone
Look into the '68-'72 Cadillac mufflers (Walker 21856). It has 2½" inlets and outlets, and it sounds like a Caddy.
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#11 |
Senior Member
![]() Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,702
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Re: No tone
Thanks very much for this advice guys. I'm going shopping for some of this stuff over the next few months, and will get it nice and quiet. Perhaps the stock oval mufflers, and I have been reading about J-pipes, they sound interesting. My last resort will be the Prius motor with dancing banana! :-)
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#12 |
Senior Member
![]() Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,702
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Re: No tone
I was just thinking of finding somebody with a Prius and do a straight engine swap. I think it would be funny to see a Prius with a Chevy 350 crammed into it. I guess they would have difficulty passing the smog check...
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#13 |
WTB this ad
Join Date: Sep 2004
Location: Lafayette Georgia
Posts: 5,074
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Re: No tone
I have 4 mufflers on my 59 Belair... 2 36" and 2 12"... it's quiet
vid clip https://www.youtube.com/watch?v=40uDpqwRG8U Last edited by see ten; 12-24-2016 at 03:45 PM. |
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#14 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: No tone
Get rid of the Flowmaster, Floprow, Blowmaster, Corsa, Borla, Whatever. Their claim to fame in most cases is being loud and annoying.
If you actually want it quiet, source a muffler and resonator intended for a Cadillac. I'd go 1967-1970 Eldorado as a random guess. They're large, but these are trucks with a lot of room. The best thing you could likely do is call Walker exhaust. They make OEM style exhaust systems, and if you tell them what you want, I'm sure they could recommend a muffler. I have dual Dynomax on mine, the large long ones, and you can't hear the engine much from the cab until you get into the throttle. At idle and cruise you don't hear it, and that's the way I think a truck should be. I have fast cars for the other stuff.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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