Home » Public Forums » GMCnet » [GMCnet] "Y" pipe
| [GMCnet] "Y" pipe [message #90415] |
Tue, 29 June 2010 10:27  |
pete lyons
Messages: 81
Registered: June 2010
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Ok, the saga continues. the local exhaust shops estimate came in way over my
budget, so I'm either driving to Cincinnati or now i'm pondering doing it in
the driveway.
I've seen some fabricated Y pipes that some have you have fabricated, so I'm
wondering if I could just use one of these:
http://www.summitracing.com/parts/MPE-10778/
Thank you in advance for you advice/wisdom.
pete
--
Pete Lyons
New Albany, IN
76 Eleganza II "Optimus Prime"
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| Re: [GMCnet] "Y" pipe [message #90421 is a reply to message #90415] |
Tue, 29 June 2010 10:55  |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma: 10
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| pete lyons wrote on Tue, 29 June 2010 10:27 |
Ok, the saga continues. the local exhaust shops estimate came in way over my
budget, so I'm either driving to Cincinnati or now i'm pondering doing it in
the driveway.
I've seen some fabricated Y pipes that some have you have fabricated, so I'm
wondering if I could just use one of these:
http://www.summitracing.com/parts/MPE-10778/
Thank you in advance for you advice/wisdom.
pete
--
Pete Lyons
New Albany, IN
76 Eleganza II "Optimus Prime"
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Have you considered buying the system from Jimmy K.? I tried putting my own system together, by buying parts here and there. It was a real hassle, and don't think I saved enough to justify the troubles. If I had to do it again, I'd just buy the system from Jimmy, It's engineered to fit correctly right up front. Take it out of the box and bolt it in place....end of story. JMHO
Larry 
78 Royale w/500 Caddy
Menomonie, WI.
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| Re: [GMCnet] "Y" pipe [message #90453 is a reply to message #90415] |
Tue, 29 June 2010 16:25 |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
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I'd second the above suggestion. JimK's system bolted right in with my coach up on jack stands. The hardest part was changing out the original exhaust manifolds for the Thorley headers. If you want to keep the original exhaust manifolds, the system is available that way as well.
George Rudawsky
Chicago, IL
75 Palm Beach
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| Re: [GMCnet] "Y" pipe [message #90464 is a reply to message #90415] |
Tue, 29 June 2010 18:09 |
fred v
Messages: 999
Registered: April 2006
Location: pensacola, fl.
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| pete lyons wrote on Tue, 29 June 2010 10:27 |
Ok, the saga continues. the local exhaust shops estimate came in way over my
budget, so I'm either driving to Cincinnati or now i'm pondering doing it in
the driveway.
I've seen some fabricated Y pipes that some have you have fabricated, so I'm
wondering if I could just use one of these:
http://www.summitracing.com/parts/MPE-10778/
Thank you in advance for you advice/wisdom.
pete
--
Pete Lyons
New Albany, IN
76 Eleganza II "Optimus Prime"
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the OEM type "Y" pipe is a true Y shape. the one you posted would work but you will have to weld up some elbows to make it fit.
good luck,
Fred V
'77 Royale RB 455
P'cola, Fl
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| Re: [GMCnet] "Y" pipe [message #90486 is a reply to message #90415] |
Tue, 29 June 2010 23:30 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Pete,
How much is your budget?
Rob M.
USAussie
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of pete lyons
Sent: Tuesday, June 29, 2010 10:28 AM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] "Y" pipe
Ok, the saga continues. the local exhaust shops estimate came in way over my
budget, so I'm either driving to Cincinnati or now i'm pondering doing it in
the driveway.
I've seen some fabricated Y pipes that some have you have fabricated, so I'm
wondering if I could just use one of these:
http://www.summitracing.com/parts/MPE-10778/
Thank you in advance for you advice/wisdom.
pete
--
Pete Lyons
New Albany, IN
76 Eleganza II "Optimus Prime"
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] "Y" pipe [message #90509 is a reply to message #90490] |
Wed, 30 June 2010 08:05 |
pete lyons
Messages: 81
Registered: June 2010
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I appreciate all the advice. I've convinced myself that with all the
pictures and advice available, I'm going to do this myself. My honey-do list
is empty, so this will be something for me to do next week.
I budget a $1,000 a year for improvements in the coach, and I've only
exceeded that once (by only $3,000 during a complete DIY renovation), so my
budget is cheap cheap cheap.
I've never welded before, so there's no time like the present to learn!
;o)
I'll be at Du Quoin, and will enjoy the drive without the sound of leaky
exhaust manifold gaskets!!!!
On Wed, Jun 30, 2010 at 1:40 AM, Larry Davick <ljdavick@comcast.net> wrote:
> Pete,
>
> In the first few months we had the coach one of the mufflers developed a
> leak. I looked at all the same options you have and finally took it to my
> local muffler shop to as if they just repair the system. $200 later with 2
> new mufflers and a bit of pipe I'm rolling along.
>
> No doubt I have more back pressure or whatever, but for now it will do. In
> time I'll go with Jim K's 3" mandrel bent system, but at the time I still
> wasn't sure how much use we'd get out of the coach. I wanted it to be safe
> first, inexpensive next.
>
> She is quiet and not stinky, so my co-pilot is happy, and so am I.
>
> Larry Davick
> The Mystery Machine
> _______________________________________________
> GMCnet mailing list
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>
--
Pete Lyons
New Albany, IN
76 Eleganza II "Optimus Prime"
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| Re: [GMCnet] "Y" pipe [message #90533 is a reply to message #90509] |
Wed, 30 June 2010 12:05 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
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It's not too hard as long as you don't have a rear grey tank like my Royale.
CarQuest carries Elbows and tubing cheap.
Tubing I remember being $7.xx a foot, you need like 14 feet to do the main pipe and the dog leg.
It's not stainless and im sure it tales more work that Jims kit, but I like doing things myself.
I used 3 3" elbows, they are mandrel bent and come with 1 end expanded so you can just slip the pipe together and then clamp or weld.
I use 2.5" from the collectors to the Y. It's not a perfect straight shot, but close. I plan on using 2 of the flexible couplings when I get time...
The Y is 22 degrees if I remember right, I put it on one of the pictures in the album
The rear flowmaster 70 requires moving some metal around, but you can get it in there
Photos in my album, user is Keith V
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] "Y" pipe [message #90536 is a reply to message #90415] |
Wed, 30 June 2010 12:35 |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma: 10
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Senior Member |
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FWIW, it will cost more to do this, but I'd use the SS band type clamps instead of standard "U" muffler clamps to put it together. Since my initial instal, I've had my system apart a couple of times. (seems i can't do anything just once) Using the band type clamps, when you loosen the bolts, the system will just fall apart. With the "U" type clamps, it can be a SOB (and I don't mean some other brand) to take apart because the clamp relies on crushing the pipe to create a seal, making the pipes very difficult to pull apart. Been there, done that too many times. Spend the extra...use the bands. JMHO
Also, I was able to put the muffler in the rear of my Royale, but I think my gray tank is smaller than the original. See this:
http://www.gmcmhphotos.com/photos/showphoto.php?photo=6723&cat=3604
and other photos in that album.
Larry
78 Royale w/500 Caddy
Menomonie, WI.
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| Re: [GMCnet] "Y" pipe [message #90538 is a reply to message #90536] |
Wed, 30 June 2010 12:43 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Leigh Harrison also has a complete exhaust system available on his web site. It is a duplicate of the OEM design, with the addition of a 3" pipe running down to the rear. All mandrel bends, and a spot for O2 sensor. It mates to the stock exhaust headers. He also includes the S.S. band clamps. After installing his system, and using the band clamps, I will never go to the other clamping system.
Happy and Quiet(almost:-))
Tom Phipps,
75 GMC Ex-Avion
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] "Y" pipe [message #90541 is a reply to message #90533] |
Wed, 30 June 2010 12:46 |
pete lyons
Messages: 81
Registered: June 2010
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So far, it looks like buying local is going to be inexpensive. 16' of 3" is
only $50.
I'm also looking at putting on two of the flexible connectors. Do you have a
supplier for them?
thanks!
pete
On Wed, Jun 30, 2010 at 1:05 PM, Keith V <my427v8@hotmail.com> wrote:
>
>
> It's not too hard as long as you don't have a rear grey tank like my
> Royale.
>
> CarQuest carries Elbows and tubing cheap.
> Tubing I remember being $7.xx a foot, you need like 14 feet to do the main
> pipe and the dog leg.
>
> It's not stainless and im sure it tales more work that Jims kit, but I like
> doing things myself.
>
> I used 3 3" elbows, they are mandrel bent and come with 1 end expanded so
> you can just slip the pipe together and then clamp or weld.
>
> I use 2.5" from the collectors to the Y. It's not a perfect straight shot,
> but close. I plan on using 2 of the flexible couplings when I get time...
>
> The Y is 22 degrees if I remember right, I put it on one of the pictures in
> the album
>
> The rear flowmaster 70 requires moving some metal around, but you can get
> it in there
>
> Photos in my album, user is Keith V
> --
> Keith
> 69 Vette
> 29 Dodge
> 75 Royale GMC
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Pete Lyons
New Albany, IN
76 Eleganza II "Optimus Prime"
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| Re: [GMCnet] "Y" pipe [message #90545 is a reply to message #90536] |
Wed, 30 June 2010 13:05 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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Senior Member |
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My tank was closer to the muffler than your heat shield...
As far as the flex couplings, I bet Car Quest has them...
I've seen smaller versions at O'Rielies, Probably available at summit, jegs and Speedway too
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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