Home » Public Forums » GMCnet » [GMCnet] which muffler?
| [GMCnet] which muffler? [message #90267] |
Mon, 28 June 2010 10:10  |
pete lyons
Messages: 81
Registered: June 2010
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I'm anxiously awaiting to hear from the muffler shop as to a nay or yea on
installing the headers and 3" system.
Which leads me to my next question:
Which flowmaster do I ask them to install? Has anyone used the
"hushpower"???
thanks!
pete
--
Pete Lyons
New Albany, IN
76 Eleganza II "Optimus Prime"
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| Re: [GMCnet] which muffler? [message #90268 is a reply to message #90267] |
Mon, 28 June 2010 10:27  |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
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I have a hush power sitting on the garage floor.
It's very loud! I bought it because I have a royale and there is a grey tank really close to the muffler. The desired Flowmaster 70 was 1/2" away.
The flow master is loud, the hushpower is worse.
Unless you want your motorhome to sound like a open pipe Harley, use at least a flowmaster 70...
BTW, the 70 is a TIGHT squeeze. you will need to open up the frame rail of the cross member to make it fit.
You also need to turn the bolts around so the heads are in.
I also cut off the corner of mine to get it to fit better.
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: [GMCnet] which muffler? [message #90297 is a reply to message #90268] |
Mon, 28 June 2010 13:25 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
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So what is the MOST QUIET muffler?? I'm getting ready to replace my exhaust and I want QUIET !
Thanks
Ray
Ray & Lisa Erspamer
78 Royale Center Kitchen
TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: Keith V <my427v8@hotmail.com>
To: gmclist@temp.gmcnet.org
Sent: Mon, June 28, 2010 10:27:27 AM
Subject: Re: [GMCnet] which muffler?
I have a hush power sitting on the garage floor.
It's very loud! I bought it because I have a royale and there is a grey tank really close to the muffler. The desired Flowmaster 70 was 1/2" away.
The flow master is loud, the hushpower is worse.
Unless you want your motorhome to sound like a open pipe Harley, use at least a flowmaster 70...
BTW, the 70 is a TIGHT squeeze. you will need to open up the frame rail of the cross member to make it fit.
You also need to turn the bolts around so the heads are in.
I also cut off the corner of mine to get it to fit better.
--
Keith
69 Vette
29 Dodge
75 Royale GMC
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Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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| Re: [GMCnet] which muffler? [message #90298 is a reply to message #90278] |
Mon, 28 June 2010 13:27 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
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I cannot fit the muffler in the rear, not a chance, my waste tank is only 9" away from the inside of the frame rail. So I plan to put a single muffler up front, what are the opinions on that ???
Ray
Ray & Lisa Erspamer
78 Royale Center Kitchen
TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: Larry <weidnerl@wwt.net>
To: gmclist@temp.gmcnet.org
Sent: Mon, June 28, 2010 11:25:41 AM
Subject: Re: [GMCnet] which muffler?
I had problems with a single in the rear providing an excessive amount of noise. I have used both the 70 series Flowmaster and the Hushpower Flowmaster muffler. The Hushpower was quite loud with quite a rap. The 70 series was quieter than the huspower, but still rapped when on the throttle going up hill or accelerating to get on expressway. I tried several other mufflers back there always getting the same awful "rap". Final solution was a 70 series Flowmaster with a resonator in the dog-leg. I've found that you just gotta have a BIG muffler back there. Here's a pic of the resonator in place in the dog-leg.
http://www.gmcmhphotos.com/photos/showphoto.php?photo=34140&title=img-2886&cat=3604
Oh, BTW, here is the resonator I used. The resonator is a Vibrant 1142 3" Ultra Quiet resonator. It is available from Amazon.com.
http://www.amazon.com/Vibrant-1142-Ultra-Quiet-resonator/dp/B001806YE2
NOW it's quiet with a nice idle rumble.
HTH
--
Larry :)
78 Royale w/500 Caddy
Menomonie, WI.
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Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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| Re: [GMCnet] which muffler? [message #90301 is a reply to message #90298] |
Mon, 28 June 2010 13:40 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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I don't think that anyone has done a single up front. You might be
the first. Oops, I lied Arch did a single muffler up front,
Here are the pictures:
http://www.gmcmhphotos.com/photos/showphoto.php?photo=20721&title=xsm-100-2182-copy&cat=4690
JR Wright
On Jun 28, 2010, at 2:27 PM, Ray Erspamer wrote:
> I cannot fit the muffler in the rear, not a chance, my waste tank is
> only 9" away from the inside of the frame rail. So I plan to put a
> single muffler up front, what are the opinions on that ???
>
> Ray
>
>
> Ray & Lisa Erspamer
> 78 Royale Center Kitchen
> TZE368V101144
> Wauwatosa, Wisconsin 53226
> Email: 78GMC-Royale@att.net
> 414-745-3188
> Web Site: http://ray-lisa.page.tl/
>
>
>
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: [GMCnet] which muffler? [message #90302 is a reply to message #90298] |
Mon, 28 June 2010 13:47 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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A friend of mine has a flowmaster 70 up front with dual inlets.
Sounds good, but hangs low, he is always scraping it.
It is not quiet, but I do like the sound.
I plan on putting two glass packs or 3" spiral mufflers up front in addition to the chopped up 70 I have in the rear.
Oh and it's less about which is the quietest and more about least loud...
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: [GMCnet] which muffler? [message #90304 is a reply to message #90298] |
Mon, 28 June 2010 14:46 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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If you want quiet system, you should go the route of the 2 in front.
Use the non performance mufflers.
The Magnaflow SS ones we supply with or kit is quiet inside, slightly noisy
on the outside only.
They are quite compared to a rear, but the large Flowmaster sounds loud at
the outlet only on the single system.
On Mon, Jun 28, 2010 at 11:27 AM, Ray Erspamer <78gmc-royale@att.net> wrote:
> I cannot fit the muffler in the rear, not a chance, my waste tank is only
> 9" away from the inside of the frame rail. So I plan to put a single
> muffler up front, what are the opinions on that ???
>
> Ray
>
>
> Ray & Lisa Erspamer
> 78 Royale Center Kitchen
> TZE368V101144
> Wauwatosa, Wisconsin 53226
> Email: 78GMC-Royale@att.net
> 414-745-3188
> Web Site: http://ray-lisa.page.tl/
>
>
>
>
> ________________________________
> From: Larry <weidnerl@wwt.net>
> To: gmclist@temp.gmcnet.org
> Sent: Mon, June 28, 2010 11:25:41 AM
> Subject: Re: [GMCnet] which muffler?
>
>
>
> I had problems with a single in the rear providing an excessive amount of
> noise. I have used both the 70 series Flowmaster and the Hushpower
> Flowmaster muffler. The Hushpower was quite loud with quite a rap. The 70
> series was quieter than the huspower, but still rapped when on the throttle
> going up hill or accelerating to get on expressway. I tried several other
> mufflers back there always getting the same awful "rap". Final solution was
> a 70 series Flowmaster with a resonator in the dog-leg. I've found that you
> just gotta have a BIG muffler back there. Here's a pic of the resonator in
> place in the dog-leg.
>
>
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=34140&title=img-2886&cat=3604
>
> Oh, BTW, here is the resonator I used. The resonator is a Vibrant 1142 3"
> Ultra Quiet resonator. It is available from Amazon.com.
>
> http://www.amazon.com/Vibrant-1142-Ultra-Quiet-resonator/dp/B001806YE2
>
> NOW it's quiet with a nice idle rumble.
>
> HTH
>
> --
> Larry :)
> 78 Royale w/500 Caddy
> Menomonie, WI.
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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> GMCnet mailing list
> List Information and Subscription Options:
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>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] which muffler? [message #90343 is a reply to message #90298] |
Mon, 28 June 2010 19:46 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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| Ray Erspamer wrote on Mon, 28 June 2010 13:27 |
I cannot fit the muffler in the rear, not a chance, my waste tank is only 9" away from the inside of the frame rail. So I plan to put a single muffler up front, what are the opinions on that ???
Ray
|
The two main problems I see with the mufflers up front are heat and having a plugged muffler making the intake heating problem worse. If your crossover is plugged you have eliminated one of the problems. Installing additional under floor insulation and additional heat shields on the added insulation and around the muffler oughta make the remaining problem acceptable.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: [GMCnet] which muffler? [message #90351 is a reply to message #90297] |
Mon, 28 June 2010 20:35 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Ray
I have been using 2 Walker Dyna max 2 1/2"mufflers in the stock location for a lot of years they are 3 pass mufflers and are not noisy. Walker claimed that they would out perform the Flow master?
Weather they do or not I couldn't say but they are not restrictive with a bunch of baffles to break up and plug the mufflers. They are pretty simple in design with good flow and last I checked in the $60 range from Summit. I replaced them once after a lot of years of use they are not stainless just double wrapped galvanized I think. I now have a 3" tailpipe and Thorley tri y headers but I used them when I had stock manifolds and pipes also. I couldn't see changing to a different muffler set up when what I had was working fine for me. I never did seem to have the hot floor some folks talk about weather or not these mufflers had any bearing on that I don't know. I do know they were real popular in the past with hot rodders and were a copy of the famous Chrysler Hemi mufflers.
Roy
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] which muffler? [message #90362 is a reply to message #90267] |
Mon, 28 June 2010 21:36 |
gbarrow2
Messages: 765
Registered: February 2004
Location: Lake Almanor, Ca./ Red Bl...
Karma: 3
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Senior Member |
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Pete,
I have a single muffler up front with headers and 3 inch exhaust.
Many of Miguel Mendez's customers have this same set up. I don't remember the name or the specs on the muffler but Miguel can tell you.
I was concerned that the single muffler would be louder than I wanted. The installer said that he could add a small resonator if I wanted it quieter. I went without the resonator and am pleased with the set up.
The muffler is a flat rectangular shape with 2 pipes in and one out. It produces a nice mellow sound and it does not heat up the floor. It does not scrape the ground.
Gene Barrow
Lake Almanor, Ca.
1976 Palm Beach
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| Re: [GMCnet] which muffler? [message #90389 is a reply to message #90362] |
Tue, 29 June 2010 02:27 |
 |
mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
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| gbarrow wrote on Mon, 28 June 2010 19:36 |
I have a single muffler up front with headers and 3 inch exhaust.
Many of Miguel Mendez's customers have this same set up. I don't remember the name or the specs on the muffler but Miguel can tell you.
<< snipped >>
The muffler is a flat rectangular shape with 2 pipes in and one out. It produces a nice mellow sound and it does not heat up the floor. It does not scrape the ground.
|
Sounds like a SpinTech: <http://www.spintechmufflers.com/mufflers/street-mufflers/truck-/-rv-8000-series/cat_30.html>
I am thinking a interesting system would be a large double inlet single muffler up front and a single glass pack in the rear. No "Y" pipe, should be free flowing and not to loud.
I have a single in/out SpinTech that I have yet to install. It fits up between the frame rails in the rear position without modifications. Some day, I'll finish that installation.
- - - - - - - - -
I am wondering what muffler position is best for low RPM torque. I know that the small, high rev'ing and high horsepower engines in JimK's favorite cars, all seem to have the mufflers in the rear. But I also know that to get high low end torque, you often need to the opposite of the high HP seekers.
Does anyone KNOW?
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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| Re: [GMCnet] which muffler? [message #90419 is a reply to message #90351] |
Tue, 29 June 2010 10:46 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
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Great input Roy, Thanks ! I will investigate this.
Ray
Ray & Lisa Erspamer
78 Royale Center Kitchen
TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: roy keen <roynpaula@charter.net>
To: gmclist@temp.gmcnet.org
Sent: Mon, June 28, 2010 8:35:55 PM
Subject: Re: [GMCnet] which muffler?
Ray
I have been using 2 Walker Dyna max 2 1/2"mufflers in the stock location for a lot of years they are 3 pass mufflers and are not noisy. Walker claimed that they would out perform the Flow master?
Weather they do or not I couldn't say but they are not restrictive with a bunch of baffles to break up and plug the mufflers. They are pretty simple in design with good flow and last I checked in the $60 range from Summit. I replaced them once after a lot of years of use they are not stainless just double wrapped galvanized I think. I now have a 3" tailpipe and Thorley tri y headers but I used them when I had stock manifolds and pipes also. I couldn't see changing to a different muffler set up when what I had was working fine for me. I never did seem to have the hot floor some folks talk about weather or not these mufflers had any bearing on that I don't know. I do know they were real popular in the past with hot rodders and were a copy of the famous Chrysler Hemi mufflers.
Roy
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Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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| Re: [GMCnet] which muffler? [message #90477 is a reply to message #90343] |
Tue, 29 June 2010 20:22 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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We supply the Magna flow mufflers as they do not have baffles that can get
loose and cause restriction. They are warrantied for life and we stand
behind them. No papers to process, call and we send you another N/C and pick
up freight both way.
They utilize a small perforated holes of ss
tube . The ones we use are the larger unit and are quiet and flows well.
On Mon, Jun 28, 2010 at 5:46 PM, Steve Southworth <midlf@centurytel.net>wrote:
>
>
> Ray Erspamer wrote on Mon, 28 June 2010 13:27
> > I cannot fit the muffler in the rear, not a chance, my waste tank is only
> 9" away from the inside of the frame rail. So I plan to put a single
> muffler up front, what are the opinions on that ???
> >
> > Ray
>
>
> The two main problems I see with the mufflers up front are heat and having
> a plugged muffler making the intake heating problem worse. If your
> crossover is plugged you have eliminated one of the problems. Installing
> additional under floor insulation and additional heat shields on the added
> insulation and around the muffler oughta make the remaining problem
> acceptable.
> --
> Steve Southworth
> 1974 Glacier TZE064V100150
> Palmyra WI
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] which muffler? [message #90530 is a reply to message #90477] |
Wed, 30 June 2010 11:39 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
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Thanks for the info Jim, what is the cost for 2 of the magna-flow mufflers?
Ray
Ray & Lisa Erspamer
78 Royale Center Kitchen
TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: Jim Kanomata <jimkanomata@gmail.com>
To: gmclist@temp.gmcnet.org
Sent: Tue, June 29, 2010 8:22:04 PM
Subject: Re: [GMCnet] which muffler?
We supply the Magna flow mufflers as they do not have baffles that can get
loose and cause restriction. They are warrantied for life and we stand
behind them. No papers to process, call and we send you another N/C and pick
up freight both way.
They utilize a small perforated holes of ss
tube . The ones we use are the larger unit and are quiet and flows well.
On Mon, Jun 28, 2010 at 5:46 PM, Steve Southworth <midlf@centurytel.net>wrote:
>
>
> Ray Erspamer wrote on Mon, 28 June 2010 13:27
> > I cannot fit the muffler in the rear, not a chance, my waste tank is only
> 9" away from the inside of the frame rail. So I plan to put a single
> muffler up front, what are the opinions on that ???
> >
> > Ray
>
>
> The two main problems I see with the mufflers up front are heat and having
> a plugged muffler making the intake heating problem worse. If your
> crossover is plugged you have eliminated one of the problems. Installing
> additional under floor insulation and additional heat shields on the added
> insulation and around the muffler oughta make the remaining problem
> acceptable.
> --
> Steve Southworth
> 1974 Glacier TZE064V100150
> Palmyra WI
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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