| Side exaust [message #135062] |
Mon, 18 July 2011 17:13  |
Terry Lytle
Messages: 16
Registered: April 2008
Karma: 0
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Junior Member |
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Hi all was poking around pics of DixieLanders at Noccalva Falls and noticed Paul and Billy Bennets coach seems to have a side exiting exaust am i correct if correct does it exit both sides or just one.
The pic is about the 21st.I ask this as i have always entertained the idea of a set of "laker" style pipes on my GMC. Has anybody done this or seen this.Think this would be way cool and just a little redneck.Any thoughts ,pics ,links, advice on this modifacation
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| Re: [GMCnet] Side exaust [message #135067 is a reply to message #135062] |
Mon, 18 July 2011 17:30  |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Terry,
Not sure about Paul's GMC exhaust.
Chuck Garton had twin side exhausts on one of his coaches, however, IIRC it
burned to the ground because the hot exhausts baked the fuel lines and they
sprang a leak.
http://www.gmcpc.org/archive/3rd_fuel_tank.pdf
Regards,
Rob M.
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Terry Lytle
Sent: Tuesday, 19 July 2011 8:14 AM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] Side exaust
Hi all was poking around pics of DixieLanders at Noccalva Falls and noticed
Paul and Billy Bennets coach seems to have a side exiting exaust am i
correct if correct does it exit both sides or just one.
The pic is about the 21st.I ask this as i have always entertained the idea
of a set of "laker" style pipes on my GMC. Has anybody done this or seen
this.Think this would be way cool and just a little redneck.Any thoughts
,pics ,links, advice on this modifacation
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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: Side exaust [message #135068 is a reply to message #135062] |
Mon, 18 July 2011 17:35 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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| Terry Lytle wrote on Mon, 18 July 2011 18:13 |
Hi all was poking around pics of DixieLanders at Noccalva Falls and noticed Paul and Billy Bennets coach seems to have a side exiting exaust am i correct if correct does it exit both sides or just one.
The pic is about the 21st.I ask this as i have always entertained the idea of a set of "laker" style pipes on my GMC. Has anybody done this or seen this.Think this would be way cool and just a little redneck.Any thoughts ,pics ,links, advice on this modifacation
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Terry: yes they are functional and exit both sides.
http://www.gmcmhphotos.com/photos/showphoto.php?photo=36335&title=100-5421&cat=5612
C. Boyd
76 Crestmont
East Tennessee
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| Re: Side exaust [message #135117 is a reply to message #135098] |
Mon, 18 July 2011 22:02 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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Senior Member |
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I wouldn't put side exhaust on a motorhome.
Too hard to make a decent performing and quiet system.
AND the exhaust noise will enter the coach in the middle making it louder
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] Side exaust [message #135126 is a reply to message #135067] |
Tue, 19 July 2011 00:23 |
jim kanomata
Messages: 257
Registered: March 2007
Location: fremont,ca
Karma: 12
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Senior Member |
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Good idea,but not on a coach as the sound from the door bottom is loud.
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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| Re: Side exaust [message #135237 is a reply to message #135062] |
Tue, 19 July 2011 17:05 |
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I'm also considering a sidepipe setup too, but would run mine a little differently intergrating an H-pipe setup tp balance the offset exhaust pulses, and resonated pipes to keep the sound mellow. I think the coach would benifit from an H-pipe setup with headers....
73 Canyon Lands, (a.k.a. The Yellow Submarine) West Los Angeles CA
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| Re: [GMCnet] Side exaust [message #135324 is a reply to message #135316] |
Wed, 20 July 2011 10:14 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Rob, an "X" pipe is used on dual exhaust systems to balance exhaust pulses
between cylinder heads. It is normally placed in the forward 1/3 of the
system, after the headers and before the mufflers. Imagine it as a dual
crossover where the exhaust from the dr side crosses over to the pass side
and vice versa. It is not used in a 2 into 1 system like the GMC stock
exhaust, as the 'Y" pipe accomplishes the same thing more or less. At the
RPMs that out GMCs operate, benefits are slight. The correctly sized headers
will do more for low and mid range torque than a dual system. I am not the
only one who thinks this way, ask Dick Paterson.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Wed, Jul 20, 2011 at 7:32 AM, Rob Mueller <robmueller@iinet.net.au>wrote:
> Michael,
>
> What is an "X" pipe?
>
> Regards,
> Rob M.
> Sydney, Australia
> AUS '75 Avion-The Blue Streak TZE365V100428
> USA '75 Avion-Double Trouble TZE365V100426
>
>
> -----Original Message-----
> From: Michael
>
> From all the research I did, an X pipe would provide more low end power on
> our motorhomes.
>
>
> _______________________________________________
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| Re: [GMCnet] Side exaust [message #135339 is a reply to message #135334] |
Wed, 20 July 2011 12:47 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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An "H" pipe is usually just a short connecting pipe welded between the L & R
sides. Cheaper than an "X", but doesn't flow downstream as well as the "X".
The largest benefit to be had from exhaust modifications more often than
not, is elimination of any sharp bends or protruding materials into the
exhaust stream. Smooth transitions between heads and headers, and any joints
or curves show improvements in flow. At high RPMs the benefits are much
greater. What can kill low end and mid range torque is often too large
inside diameter in the areas immediately downstream from the cylinder heads,
ie; too large of header tubes.
Jim Hupy
Salem, OR
78 GMC Royale 403 Doug Thorley headers, two straight through welded in
mufflers, "Y" pire, 2 1/2 in the rest of the way to the rear bumper.
On Wed, Jul 20, 2011 at 10:12 AM, Michael <lilmyk@gmail.com> wrote:
>
>
> I agree with a single exhaust, an x pipe is not needed.
> But I already have a dual exhaust and someone mentioned adding an H-pipe.
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