C6/LS2 "H" Pipe, Why?
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Instructor
Joined: Jun 2001
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From: HAMILTON,MA.USA
C6/LS2 "H" Pipe, Why?
Why does GM use a "H" pipe? If a "X" pipe has improved airflow characteristics, then why dosen't GM Engineering incorporate them.
Someone once told me that they purposely are restricting the airflow of the LS2 to limit the power to 400 H.P. for whatever reason ????
Someone once told me that they purposely are restricting the airflow of the LS2 to limit the power to 400 H.P. for whatever reason ????
Last edited by RABVET427; Oct 2, 2006 at 12:45 PM.
Instructor
Joined: May 2006
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Originally Posted by RABVET427
Why does GM use a "H" pipe? If a "X" pipe has improved airflow characteristics, then why dosen't GM Engineering incorporate them.
Someone once told me that they purposely are restricting the airflow of the LS2 to limit the power to 400 H.P. for whatever reason ????
Someone once told me that they purposely are restricting the airflow of the LS2 to limit the power to 400 H.P. for whatever reason ????
Drifting
Joined: Nov 2002
Posts: 1,651
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From: laguna niguel ca
An H Pipe is GM's cheap way to try and balance Exhaust pulses. An X pipe has showed time and time again to work much better. what this means is as exhaust gases travel through there respective pipes there velocity begins to slow. By connecting the two pipes the alternating pulses help maintain some velocity there by helping to scavenge the cylinders more effectively which aids in the filling of the cylinders with the incomming fuel and air charge. In theory this increases torque somewhat. It also lessens the poping you sometimes here during
deceleration. Also the x pipe works better because exhaust gases don't like to make 90 degree turns, and the X pipe is the same diameter as the exhaust pipes where as the H pipe connector is smaller in diameter.
As for your statement about keeping HP down it's miminal. Meaning it's not a major restriction. If you're going to leave your car stock then leave the H pipe alone.
andreas G.
deceleration. Also the x pipe works better because exhaust gases don't like to make 90 degree turns, and the X pipe is the same diameter as the exhaust pipes where as the H pipe connector is smaller in diameter.
As for your statement about keeping HP down it's miminal. Meaning it's not a major restriction. If you're going to leave your car stock then leave the H pipe alone.
andreas G.
Melting Slicks
Joined: Jul 2006
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From: Stillwater MN
"H" pipes with aftermarket exhaust gives the car a nice gurgle sound when you let off the gas or downshift, I heard that when you replace it with an "X" pipe it eliminates that sound. I have Bullets and am getting American Racing headers with a X-pipe and high-flow cats, I will miss that cool gurgle/popping sound.
Pro
Joined: Dec 2004
Posts: 530
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From: Colorado Springs CO
[QUOTE=andreas g.] Also the x pipe works better because exhaust gases don't like to make 90 degree turns, and the X pipe is the same diameter as the exhaust pipes where as the H pipe connector is smaller in diameter.QUOTE]
I thought that was on the C5 exhaust system. Didn't GM redesign the C6 H pipe connection to be the same diameter as the exhaust pipes, or did they keep the same small tube design? Just wondering...
I thought that was on the C5 exhaust system. Didn't GM redesign the C6 H pipe connection to be the same diameter as the exhaust pipes, or did they keep the same small tube design? Just wondering...
Drifting
Joined: Jul 2003
Posts: 1,796
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From: Annandale VA
An X-pipe may reduce the popping and gurgling, but it definitely does NOT eliminate it.
My personal experience is that it also makes the exhaust sound much better. Each to his own opinion........
My personal experience is that it also makes the exhaust sound much better. Each to his own opinion........
