x or true dual
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
From the picture, it looks like the system is true dual. Look close at the resonator picture, the middle is not joined together. They are seperate, like two resonators. It looks to me like an X pipe would help. The resonators design looks like it would very slightly hurt flow.
Instructor
Joined: Jun 2003
Posts: 168
Likes: 0
From: Crystal Lake IL
In the picture it looks more like true duel to me. It goes straight through and in no way crosses over. Doesn't an x-pipe mean the pipes will cross? IMO it is to keep noise lower in the car and that's why it is placed where it is. Listen to the stock exhaust on the early C4 compared to the LTx. The early cars tone is a lot different. Can anyone that has owned both compare the sound inside? It was probably all in trying to make a more civilized and worldly car. Like Porsche. There were so many complaints of the early C4. Please if my opinions sound way off, bash me nicely.
Drifting
Joined: Sep 2005
Posts: 1,867
Likes: 3
From: Pasadena Maryland
From what I see in the picture the resonator is a MIXING chamber. Call it what you will X-H-R?. The resonator in the picture allows both banks of cylinders to mix. When I think of TRUE dual, I think of a system that has 1 tailpipe for the left bank and 1 for the right bank, NO mixing of the exhaust gases between the right and left bank of cylinders.
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
if it is a mixing chamber, it is uncontrolled, hense, of no use.
An x-pipe must be placed at the hot spot on the exhaust. That is where the tumbling is occuring so that the pipe can do the best job.
An x-pipe must be placed at the hot spot on the exhaust. That is where the tumbling is occuring so that the pipe can do the best job.
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
How is it any more or less controlled than an Xpipe?
I think the resonator is there to tune the exhaust length and to balance the exhaust pressure.
http://www.popularhotrodding.com/eng...exh/index.html
http://www.mustangforums.com/m_1028601/tm.htm
I think the resonator is there to tune the exhaust length and to balance the exhaust pressure.
http://www.popularhotrodding.com/eng...exh/index.html
http://www.mustangforums.com/m_1028601/tm.htm
Thread Starter
Instructor
Joined: Dec 2006
Posts: 114
Likes: 0
From: Florida
wow i didnt think alot of people would post replys to this lol...well i like how everyone is saying something....so pretty much what i would like to kno is...if i go "true dual"..will i loose power?
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Team Owner
Joined: May 2002
Posts: 24,337
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
You might want to listen to nobody until someone who's actually done this or similar has something to say and can back it up with timeslips or dyno pulls. Any gain or loss to be had here is going to be relatively small, so no seat-of-the-pants test is going to tell you anything, especially when the exhaust tone is changing too.
Instructor
Joined: May 2007
Posts: 108
Likes: 1
From: Houston Texas
I have a 1995 vette so I am interested in this discussion. From what I see in the picture there are 2 horizontal lines right through the middle of the resonator. If one was to mirror this image and weld it back to the original image, it would be two separate chambers. Is that correct?
(and when I mean weld it back - both of those horizontal lines will be welded separately)
(and when I mean weld it back - both of those horizontal lines will be welded separately)
Instructor
Joined: Jun 2003
Posts: 168
Likes: 0
From: Crystal Lake IL
I have a 1995 vette so I am interested in this discussion. From what I see in the picture there are 2 horizontal lines right through the middle of the resonator. If one was to mirror this image and weld it back to the original image, it would be two separate chambers. Is that correct?
(and when I mean weld it back - both of those horizontal lines will be welded separately)
(and when I mean weld it back - both of those horizontal lines will be welded separately)
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Doesnt matter, wherever the exhaust gases meet they are going to equalize themselves just from exhaust pressures alone. The engine is going to pump it all out in the end anyway. The X may cause a little less turbulence depending but IMO the difference is too small if any to worry about.
Racer
Joined: Aug 2005
Posts: 469
Likes: 1
hi there guys,
im running 1/3/4 dimameter " long tube headers, then high flow small cats,then 2.5 " mandrel pipe into x-pipe cross over thru to true duel 2.5" stainless pipes all the way thru too magna flow rear mufflers with lt1 tips!
sounds like a charm,goes like a charm!
it is ideal to run x-pipe and duel system togeather as the x-pipe acts as a balancer and provides better scavenging of the air !!!
i cant do much better besides going larger diameter to 2.75" but really 2.5 " is all you need !
glen
Australia
im running 1/3/4 dimameter " long tube headers, then high flow small cats,then 2.5 " mandrel pipe into x-pipe cross over thru to true duel 2.5" stainless pipes all the way thru too magna flow rear mufflers with lt1 tips!
sounds like a charm,goes like a charm!
it is ideal to run x-pipe and duel system togeather as the x-pipe acts as a balancer and provides better scavenging of the air !!!
i cant do much better besides going larger diameter to 2.75" but really 2.5 " is all you need !
glen
Australia
Last edited by sxyvet; May 15, 2007 at 12:52 PM.
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
I have a 1995 vette so I am interested in this discussion. From what I see in the picture there are 2 horizontal lines right through the middle of the resonator. If one was to mirror this image and weld it back to the original image, it would be two separate chambers. Is that correct?
(and when I mean weld it back - both of those horizontal lines will be welded separately)
(and when I mean weld it back - both of those horizontal lines will be welded separately)
with Ray.
Race Director
Joined: Jun 2004
Posts: 13,957
Likes: 706
From: WI
This is funny. So there are two such resonators on the car? That means it's true dual with no cross over at all and an X or H pipe would help. Right?
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
OK, I just swiped this pic from another thread showing this type of resonator and the white line shows the cut angle of the rusty old chamber that was cut in half.. so the exhaust from each bank DO "mix" like CC has been trying to explain.
Last edited by MikeC4; May 15, 2007 at 02:27 PM.