More Exhaust/Muffler questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

96blazr · 10-16-2009, 03:53 PM

Okay guys (and Gals) here’s the deal. It’s time for me to get a dual exhaust on my 68 SWB. I have a Stock 350 from a 77 ‘Vette along with the 350 Trans. I’m not looking for LOUD, I’m looking for DEPTH. Here’s what I’m thinking; Stock manifolds, H-pipe connected using one of two mufflers I’ve narrowed it down to.
I’m thinking of using either Hooker AeroChambers or the Hushpowers. I’m not going to go 2 ½, I’m going to stick with 2 ¼ cause it’s a bone stock engine and like I said I don’t want Too loud, but I do want depth, as in a DEEP rumble.
I’m going to slice my tips too, cause I understand that’ll add to reducing any “raspy” type of notes.
And I’m also going to carry it all the way out similar to stock location.

What I’d like to know from everyone is their opinion on that set-up and can I ask for Pics with how everyone has routed your exhaust, Please? I’m going to print those and make sure my exhaust guy sees what I’m talking about and we can both have a clear understanding of what I want and what he can do.
I sure would appreciate everyone’s input on this.

One more thing; has anyone on here heard or seen anyone using the AeroChambers? I saw some videos and I really like the way they sound.

But I like the Hushpower also.

69GMCLonghorn · 10-16-2009, 05:14 PM

I'm unfamiliar with the 2 mufflers you're thinking about. I know the usual suspects: Flowmaster and Magnaflow. I am a 100% convert to Magnaflow! The Flowmasters always have a point at which the reverb is deafening. The Magnaflows with in H pipe are smooth as anything I've heard! No slicing of tips needed. I ran dual 2 1/2" all the way out as you said you want to. It was not loud at all, idled quietly and was just an all around great option.

FYI, if you nail it and run it up to 5000 rpm, ANYTHING will make some noise as I'm sure you know.

One last thing: The Magnaflows last WAY longer than most mufflers from I've heard and read. I had mine for 5 years before selling the truck and they were still sealed up and performing just fine.

Good luck!

96blazr · 10-17-2009, 09:42 AM

Thanks for the reply Longhorn. I do want it to rumble at idle, but I just want to try to eliminate as much of the Nasty "RAP, RAP" when you start to get on it. The Magnaflows were in the running when I was looking at all my choices and they might still be there, cause I'm also not sure if the AeroChambers will fit with our rear end set-up.

Plus like I said I'm also looking for Pics of routing out piping if anyone would please post those.

coopdeville · 10-17-2009, 11:42 AM

hushpowers are crap! i ran them for about 2 days on my hot rod and they robbed power and sounded like hell to me. a good 2.25in exhaust system with an h pipe and a good set of flows or magnaflows will work. if you dont want it loud and want a good tone you should look at flowmasters 50 s.u.v. series , they ahve a good tone and dont resonate inside the cab.

96blazr · 10-18-2009, 03:13 PM

First time I've ever heard someone say the Hushpowers are crap. WOW.

'72customdeluxe · 10-18-2009, 03:52 PM

Dynomax ultraflow. The 2.25 duals will work good, but currently I believe 2.25 into a 3" single with a good merge (flowmaster's only good product) is better for mileage and torque kn a stocker. The single is slightly smaller in volume than 2.25 duals and a single scavenges better with a proper (again, flowmaster is good). If you go with duals I would recommend an x-pipe. They're smoother and quieter while performing better

texanidiot25 · 10-18-2009, 04:01 PM

Good ol set of Turbo mufflers is what I have. Sweet idle, and great tone with out rattling you inside. Only time it gets real reverb-y is at 900 rpm, my "Car Alarm Tester" when in the ghetto.

YouTube - '69 Chevy C10 live axle

There is a lot more bass/tone in real life, blame the chitty camera I was using.

It's only loud when you wring it out, IMO

'72customdeluxe · 10-18-2009, 04:10 PM

Turbos resonated like a hoe on my longbed, they were right before the axle and Dumped after it. 2.25 pinched pipe, no crossover and stock manifolds. No name turbos

texanidiot25 · 10-18-2009, 04:16 PM

Could be the brand then. Only time these resonate is under load and under 1000 rpm. Long tube headers, 2.25", no H pipe.

big_al_71 · 10-18-2009, 06:15 PM

I went with dynomax and they are not too loud they do bark when wide open...

'72customdeluxe · 10-18-2009, 08:41 PM

Hey Al, did you go with the ultra flo's? We had great luck with one on an '03 Ram catback, cheapish too.

Rack Man · 10-18-2009, 09:03 PM

I went with the Dynomax as well....Super Turbos....Its still under construction so I have only heard it run twice...but it sounded awesome....I have heard a lot of good reviews about em...and super economical! .....I dumped out in front of the rear wheels on my K-10.....

unclewatts · 10-19-2009, 01:37 AM

Been running Hedman headers with Flowmaster 40 series Classics and 2 1/4" pipes. Have been very happy with them as I get the very deep rumble at idle. Normal driving is OK and I can live with it. When you jump on it, it sounds like one of them Modifieds at my local track and every cop in my county suddenly looks up!

96blazr · 10-21-2009, 08:22 AM

Thanks for all the input guys. Hopefully other folks will want to give me some input and Pics/Videos of their exhausts.

BIG AL; would it be possible for you send me pics of your system please? I'll send you a PM.

big_al_71 · 10-21-2009, 10:30 AM

Quote:

Originally Posted by 96blazr

Thanks for all the input guys. Hopefully other folks will want to give me some input and Pics/Videos of their exhausts.

BIG AL; would it be possible for you send me pics of your system please? I'll send you a PM.

pm answered and I emailed you several picts.....

**70cst** · 10-21-2009, 09:56 AM

http://www.youtube.com/watch?v=SlWalKMmsMo

Spintech Exhaust ???

http://www.spintechmufflers.com/spin...ntechindex.asp

Here is what I bought for the Circuit Rider which has a slightly modified 402BB...

More info on previous threads...Enjoy
http://67-72chevytrucks.com/vboard/s...d.php?t=324705

http://67-72chevytrucks.com/vboard/s...d.php?t=294560

http://67-72chevytrucks.com/vboard/s...d.php?t=334192

http://67-72chevytrucks.com/vboard/s...d.php?t=277047

wp silverado · 10-21-2009, 10:14 AM

here's vid of mine, im running hedman longtubes into 2.25 pipe with flowmasters and then back into 2.25 pipe all the way to the rear. no h-pipe, its true duals,

[IMG]http://i276.photobucket.com/albums/kk7/wpsilv...

96blazr · 10-22-2009, 08:23 AM

Quote:

Originally Posted by wp silverado

here's vid of mine, im running hedman longtubes into 2.25 pipe with flowmasters and then back into 2.25 pipe all the way to the rear. no h-pipe, its true duals,

NICE sounding truck WP!!

Sykesville huh? Not too far away. I'm in Fairfax County, VA. What series Flows are you using and where did you get your tips?

big_al_71 · 10-21-2009, 10:33 AM

here is a crappy cell phone video of my truck at idle..I am going to use my video camera and do a nice video of my truck from every angle so hopefully I will do a good job to share with those interested..

YouTube - 71c10

Shon · 10-21-2009, 10:48 AM

I have used aerochamber mufflers on the 4th Gen f-bods, I LIKE THEM.

I prefer Magnaflow but either one is good. I have used the Dynomax also and they are slightly louder than Aerochamber at idle. Magnaflow being the quietest at idle.

vectorit · 10-21-2009, 11:23 AM

I have stock pipe diameter with H pipe cross over, and the tail pipes exit out the back behind the rear tire while using the stock rams.

I am using Flowmaster series 70's.

I went this route, since I didn't want it to sound like a dragster.
I'm really happy with the sound, and it is quiet enough for me to "hear" the engine while it runs. Heck my drive train makes more noise than the exhaust while on the highway.

tim21391 · 10-21-2009, 10:50 AM

flowmaster original 40s on mine

YouTube - 1972 Chevrolet C-10 Flowmaster 40...

Jim_PA · 10-21-2009, 11:07 AM

I'd say the Aerochambers are kinda in the middle between Magnaflow and Flowmaster. They have a deeper tone like a Magnaflow, but louder.

Here's mine with Hooker headers, and true-dual Hooker aerochambers: http://www.personal.psu.edu/jxu109/t...ro_chamber.wav

And here is is with Thorley Tri-y's and Magnaflow header-back with X-pipe: http://www.personal.psu.edu/jxu109/t...rleytri-ys.wav

UltraBlue71 · 10-21-2009, 11:19 AM

I loves me some magnaflows! They sound good but arent obnoxiuos, as I have often heard them explained.

68Stepbed · 10-22-2009, 01:57 PM

Have you looked at the Cherry Bomb Vortex mufflers? I'm gonna run one on my F@&d when I have the exhaust done on it. The vortex muffler is basically a combination of a Flowmaster and a Magnaflow muffler.

I have 2.5" pipes with Flowmaster Super 40's on my 68. It's kinda loud, but I like it that way since it's not a DD. My 86 GMC with a stock engine and manifolds had 2.25" pipes and the 50 series Delta Flow Flowmasters with an H pipe. It had the perfect mellow tone. It wasn't loud at all, didn't resonate bad in the cab, and just sounded great. It was just loud enough to know it.

10-16-2009, 03:53 PM	#1
96blazr Registered User Join Date: Aug 2003 Location: VA Posts: 740	More Exhaust/Muffler questions Okay guys (and Gals) here’s the deal. It’s time for me to get a dual exhaust on my 68 SWB. I have a Stock 350 from a 77 ‘Vette along with the 350 Trans. I’m not looking for LOUD, I’m looking for DEPTH. Here’s what I’m thinking; Stock manifolds, H-pipe connected using one of two mufflers I’ve narrowed it down to. I’m thinking of using either Hooker AeroChambers or the Hushpowers. I’m not going to go 2 ½, I’m going to stick with 2 ¼ cause it’s a bone stock engine and like I said I don’t want Too loud, but I do want depth, as in a DEEP rumble. I’m going to slice my tips too, cause I understand that’ll add to reducing any “raspy” type of notes. And I’m also going to carry it all the way out similar to stock location. What I’d like to know from everyone is their opinion on that set-up and can I ask for Pics with how everyone has routed your exhaust, Please? I’m going to print those and make sure my exhaust guy sees what I’m talking about and we can both have a clear understanding of what I want and what he can do. I sure would appreciate everyone’s input on this. One more thing; has anyone on here heard or seen anyone using the AeroChambers? I saw some videos and I really like the way they sound. But I like the Hushpower also. __________________ 1968 SWB. GMPP 350/350 Turbo Trans, Edelbrock Performer & Carb. Hedman Hedders, Hooker Aerochambers Mufflers. Tuff Stuff Alternators. Remember, no matter where you go, There you are. Gary

10-16-2009, 05:14 PM	#2
69GMCLonghorn Registered User Join Date: Dec 2006 Location: Porter Ranch, CA Posts: 978	Re: More Exhaust/Muffler questions I'm unfamiliar with the 2 mufflers you're thinking about. I know the usual suspects: Flowmaster and Magnaflow. I am a 100% convert to Magnaflow! The Flowmasters always have a point at which the reverb is deafening. The Magnaflows with in H pipe are smooth as anything I've heard! No slicing of tips needed. I ran dual 2 1/2" all the way out as you said you want to. It was not loud at all, idled quietly and was just an all around great option. FYI, if you nail it and run it up to 5000 rpm, ANYTHING will make some noise as I'm sure you know. One last thing: The Magnaflows last WAY longer than most mufflers from I've heard and read. I had mine for 5 years before selling the truck and they were still sealed up and performing just fine. Good luck!

10-17-2009, 09:42 AM	#3
96blazr Registered User Join Date: Aug 2003 Location: VA Posts: 740	Re: More Exhaust/Muffler questions Thanks for the reply Longhorn. I do want it to rumble at idle, but I just want to try to eliminate as much of the Nasty "RAP, RAP" when you start to get on it. The Magnaflows were in the running when I was looking at all my choices and they might still be there, cause I'm also not sure if the AeroChambers will fit with our rear end set-up. Plus like I said I'm also looking for Pics of routing out piping if anyone would please post those. __________________ 1968 SWB. GMPP 350/350 Turbo Trans, Edelbrock Performer & Carb. Hedman Hedders, Hooker Aerochambers Mufflers. Tuff Stuff Alternators. Remember, no matter where you go, There you are. Gary Last edited by 96blazr; 10-17-2009 at 09:42 AM.

10-17-2009, 11:42 AM	#4
coopdeville Registered User Join Date: Oct 2008 Location: tacoma wa Posts: 79	Re: More Exhaust/Muffler questions hushpowers are crap! i ran them for about 2 days on my hot rod and they robbed power and sounded like hell to me. a good 2.25in exhaust system with an h pipe and a good set of flows or magnaflows will work. if you dont want it loud and want a good tone you should look at flowmasters 50 s.u.v. series , they ahve a good tone and dont resonate inside the cab. __________________ myspace.com/southtacomaalleyrally

10-18-2009, 03:13 PM	#5
96blazr Registered User Join Date: Aug 2003 Location: VA Posts: 740	Re: More Exhaust/Muffler questions First time I've ever heard someone say the Hushpowers are crap. WOW. __________________ 1968 SWB. GMPP 350/350 Turbo Trans, Edelbrock Performer & Carb. Hedman Hedders, Hooker Aerochambers Mufflers. Tuff Stuff Alternators. Remember, no matter where you go, There you are. Gary

10-18-2009, 03:52 PM	#6
'72customdeluxe Registered User Join Date: Jan 2008 Location: Tejas Posts: 691	Re: More Exhaust/Muffler questions Dynomax ultraflow. The 2.25 duals will work good, but currently I believe 2.25 into a 3" single with a good merge (flowmaster's only good product) is better for mileage and torque kn a stocker. The single is slightly smaller in volume than 2.25 duals and a single scavenges better with a proper (again, flowmaster is good). If you go with duals I would recommend an x-pipe. They're smoother and quieter while performing better __________________ '72 cheyenne super step, '05 long bed gmc

10-18-2009, 04:10 PM	#8
'72customdeluxe Registered User Join Date: Jan 2008 Location: Tejas Posts: 691	Re: More Exhaust/Muffler questions Turbos resonated like a hoe on my longbed, they were right before the axle and Dumped after it. 2.25 pinched pipe, no crossover and stock manifolds. No name turbos __________________ '72 cheyenne super step, '05 long bed gmc

10-18-2009, 04:16 PM	#9
texanidiot25 Eat My Rust Join Date: Jan 2007 Location: Cypress, Texas Posts: 3,362	Re: More Exhaust/Muffler questions Could be the brand then. Only time these resonate is under load and under 1000 rpm. Long tube headers, 2.25", no H pipe.

10-18-2009, 06:15 PM	#10
big_al_71 Registered User Join Date: Jun 2008 Location: South Florida Posts: 11,375	Re: More Exhaust/Muffler questions I went with dynomax and they are not too loud they do bark when wide open... __________________ Get your facts first, and then you can distort them as much as you please!!!!!. Sylvester's build thread >>>http://67-72chevytrucks.com/vboard/s...ht=big+rebuild Last edited by big_al_71; 10-18-2009 at 06:15 PM.

10-18-2009, 08:41 PM	#11
'72customdeluxe Registered User Join Date: Jan 2008 Location: Tejas Posts: 691	Re: More Exhaust/Muffler questions Hey Al, did you go with the ultra flo's? We had great luck with one on an '03 Ram catback, cheapish too. __________________ '72 cheyenne super step, '05 long bed gmc

10-18-2009, 09:03 PM	#12
Rack Man Registered User Join Date: Sep 2008 Location: Tempe, AZ Posts: 770	Re: More Exhaust/Muffler questions I went with the Dynomax as well....Super Turbos....Its still under construction so I have only heard it run twice...but it sounded awesome....I have heard a lot of good reviews about em...and super economical! .....I dumped out in front of the rear wheels on my K-10..... __________________ My Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=309288

10-19-2009, 01:37 AM	#13
unclewatts 70 Chevrolet=Obsession Join Date: Jun 2009 Location: nice ca Posts: 1,067	Re: More Exhaust/Muffler questions Been running Hedman headers with Flowmaster 40 series Classics and 2 1/4" pipes. Have been very happy with them as I get the very deep rumble at idle. Normal driving is OK and I can live with it. When you jump on it, it sounds like one of them Modifieds at my local track and every cop in my county suddenly looks up! __________________ I'm Just like my truck. Old, Ugly and Grouchy. Except my truck starts easily in the morning and doesn't smoke! IT'S NOT EASY BEING GREEN! -Kermit the frog 1970 Chevrolet C-10 Longbed Stepside : 350, Muncie M20, 3.08 GM corp. positraction Forest green exterior/light green interior(Where all my money goes) 1996 Toyota Corolla (Parts runner)

10-21-2009, 08:22 AM	#14
96blazr Registered User Join Date: Aug 2003 Location: VA Posts: 740	Re: More Exhaust/Muffler questions Thanks for all the input guys. Hopefully other folks will want to give me some input and Pics/Videos of their exhausts. BIG AL; would it be possible for you send me pics of your system please? I'll send you a PM. __________________ 1968 SWB. GMPP 350/350 Turbo Trans, Edelbrock Performer & Carb. Hedman Hedders, Hooker Aerochambers Mufflers. Tuff Stuff Alternators. Remember, no matter where you go, There you are. Gary

10-21-2009, 10:48 AM	#20
Shon Registered User Join Date: Sep 2005 Location: sc Posts: 1,203	Re: More Exhaust/Muffler questions I have used aerochamber mufflers on the 4th Gen f-bods, I LIKE THEM. I prefer Magnaflow but either one is good. I have used the Dynomax also and they are slightly louder than Aerochamber at idle. Magnaflow being the quietest at idle. __________________ 71 Cheyenne C10 LWB cam'd 6.0/T56 Swap

10-21-2009, 11:23 AM	#21
vectorit What? Join Date: Jun 2007 Location: Southern California Posts: 7,617	Re: More Exhaust/Muffler questions I have stock pipe diameter with H pipe cross over, and the tail pipes exit out the back behind the rear tire while using the stock rams. I am using Flowmaster series 70's. I went this route, since I didn't want it to sound like a dragster. I'm really happy with the sound, and it is quiet enough for me to "hear" the engine while it runs. Heck my drive train makes more noise than the exhaust while on the highway. __________________ Chris 1968 K20 Suburban 1972 K10 LWB PU



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10-21-2009, 11:07 AM	#23
Jim_PA Registered User Join Date: May 2005 Location: PA Posts: 2,696	Re: More Exhaust/Muffler questions I'd say the Aerochambers are kinda in the middle between Magnaflow and Flowmaster. They have a deeper tone like a Magnaflow, but louder. Here's mine with Hooker headers, and true-dual Hooker aerochambers: http://www.personal.psu.edu/jxu109/t...ro_chamber.wav And here is is with Thorley Tri-y's and Magnaflow header-back with X-pipe: http://www.personal.psu.edu/jxu109/t...rleytri-ys.wav

10-21-2009, 11:19 AM	#24
UltraBlue71 Registered User Join Date: Feb 2009 Location: OKC OK Posts: 489	Re: More Exhaust/Muffler questions I loves me some magnaflows! They sound good but arent obnoxiuos, as I have often heard them explained. __________________ "You can put lipstick on a pig, sure it's pretty pig, but it's still just a PIG... 71 LWB

10-22-2009, 01:57 PM	#25
68Stepbed Registered User Join Date: Mar 2005 Location: 10-Uh-See Posts: 5,609	Re: More Exhaust/Muffler questions Have you looked at the Cherry Bomb Vortex mufflers? I'm gonna run one on my F@&d when I have the exhaust done on it. The vortex muffler is basically a combination of a Flowmaster and a Magnaflow muffler. I have 2.5" pipes with Flowmaster Super 40's on my 68. It's kinda loud, but I like it that way since it's not a DD. My 86 GMC with a stock engine and manifolds had 2.25" pipes and the 50 series Delta Flow Flowmasters with an H pipe. It had the perfect mellow tone. It wasn't loud at all, didn't resonate bad in the cab, and just sounded great. It was just loud enough to know it. __________________ Matt 68 C10 stepside, LS1/700R4, TCI Engineering suspension system

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