H pipe?
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Race Director
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From: not far enough from Chicago
H pipe?
I just read something on C5 G about the new GTO and how they did some testing with the H pipe blocked so that it sounded more agressive with true dual exhaust. Wouldn't losing the H pipe help the sound and make it more like a 60's muscle car? Has anyone done this, and what is the point of an H pipe anyway? :confused:
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From: Fort Worth Texas
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Re: H pipe? (SBSB)
The crossover reduces back pressure, and im sure if the placement is right, would also help wave control at certain rpm to increase power. I guess they sacrificed a couple of rear wheel HP, to sell sound.
[Modified by kewlbrz, 10:56 PM 11/4/2003]
[Modified by kewlbrz, 10:56 PM 11/4/2003]
Team Owner
Joined: Mar 2001
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From: small town in S.E Pa. PA
St. Jude Donor '03-'04
Re: H pipe? (SBSB)
I just read something on C5 G about the new GTO and how they did some testing with the H pipe blocked so that it sounded more agressive with true dual exhaust. Wouldn't losing the H pipe help the sound and make it more like a 60's muscle car? Has anyone done this, and what is the point of an H pipe anyway? :confused:
as opose to one pipe with a "Y" connection and one muffler with one inlet and two outlets..
C5 's have "True dual exhaust" .... with the lastest technolgy.... used to balance the exhaust pulses from each bank... as far as sound goes... these C5's do not have the old 1 8 4 3 6 5 7 2 firing order...so they do not sound the same...
Thread Starter
Race Director
Joined: Aug 2002
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From: not far enough from Chicago
Re: H pipe? (Evil-Twin)
The term "true dual exhaust" in your context is misleading.....having two pipes from the engine with no interconnections is old technology...
as opose to one pipe with a "Y" connection and one muffler with one inlet and two outlets..
C5 's have "True dual exhaust" .... with the lastest technolgy.... used to balance the exhaust pulses from each bank... as far as sound goes... these C5's do not have the old 1 8 4 3 6 5 7 2 firing order...so they do not sound the same...
as opose to one pipe with a "Y" connection and one muffler with one inlet and two outlets..
C5 's have "True dual exhaust" .... with the lastest technolgy.... used to balance the exhaust pulses from each bank... as far as sound goes... these C5's do not have the old 1 8 4 3 6 5 7 2 firing order...so they do not sound the same...
Thanks for the replies. I have read that the fireing order is different which effects the sound. I have also noticed that a connection between both sides is being used on other vehicles as well. I just didn't know the reason for it and thought it may have something to do with she sound. Thank God their not using that Micky mouse single to dual exhaust split thing like they used to. I wonder if they were refering to that as "new technology" back then. :lol:
Pro
Joined: Jun 2003
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From: Castle Rock Co
Re: H pipe? (SBSB)
Work the math, and you will see that a single 3.5" pipe has the same cross sectional area as a pair of 2.5" duals.
The single pipe allows both banks to share the CFM of the exhaust system, combine that with less interior surface area, and half the bends and the single pipe starts looking really good.
Single pipe=better actually. The cross over is a means of getting some of the benefits of a single pipe on a dual system. The only problem with a single pipe is that V8s sound better in stereo.
The single pipe allows both banks to share the CFM of the exhaust system, combine that with less interior surface area, and half the bends and the single pipe starts looking really good.
Single pipe=better actually. The cross over is a means of getting some of the benefits of a single pipe on a dual system. The only problem with a single pipe is that V8s sound better in stereo.
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From: small town in S.E Pa. PA
St. Jude Donor '03-'04
Re: H pipe? (Heretic)
Work the math, and you will see that a single 3.5" pipe has the same cross sectional area as a pair of 2.5" duals.
The single pipe allows both banks to share the CFM of the exhaust system, combine that with less interior surface area, and half the bends and the single pipe starts looking really good.
Single pipe=better actually. The cross over is a means of getting some of the benefits of a single pipe on a dual system. The only problem with a single pipe is that V8s sound better in stereo.
The single pipe allows both banks to share the CFM of the exhaust system, combine that with less interior surface area, and half the bends and the single pipe starts looking really good.
Single pipe=better actually. The cross over is a means of getting some of the benefits of a single pipe on a dual system. The only problem with a single pipe is that V8s sound better in stereo.
two 2.5 inch pipes would produce 5 cubic inches of volume per inch..
the only way this would work is if the exhaust manifolds were equal length and the single pipe went right down the middle of the CAR... BUT EVEN THEN.. BOTH banks from the exhaust manifold would have to have the same exact volume.. or there would be a pulse imbalance,..
[Modified by Evil-Twin, 3:54 PM 11/6/2003]
Pro
Joined: Jun 2003
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From: Castle Rock Co
Re: H pipe? (Evil-Twin)
3.5" pipe, 1.75" radius so PI R^2 =9.61 square inches
2.5" pipe 4.9 square inches *2 pipes = 9.81 oops I'm .2 off.
Also where did you get 3.5 CI for 1" of 3.5" pipe? By my math its 9.61 CI.
Fact of the matter is a single 3.5" pipe out flows two 2.5" pipes.
I won't even try to go into laminar flow and friction.
[Modified by Heretic, 2:16 PM 11/6/2003]
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