Xpipe or Hpipe?
05-09-2014, 02:21 PM
#12
.......but it seems like the middle of the H pipe would act kinda as a resonator almost.. what does that air flow do once it gets in the middle there. like i said though i have no experience with the H-pipeThe H acts like an expansion chamber. So when the exhaust from one side of the H flows passed it, any negative pressure on the other side of the H allows the other flowing side to keep moving and aids in the relief of any positive pressure to fight it..
So as the slug of exhaust gas in the H moves left and right, it has a scavenging affect that actually helps "pull" the exhaust out of the manifolds.. Kinda like a game of catch between both sides of the motor.. Gasses are basically pushing and pulling just like an oceans tide..
By design I believe the H pipe is considered to be easier to DIY make then the X pipe, because its just a piece of pipe T'd into 2 pipes.. I hear it has a lower grunt sound then a higher pitched sounding X pipe, but I personally can't tell.. I've only dealt with X pipes..
The lines on your H pipe drawing make it seem like a reservoir or a dead end. However, instead of the exhaust bumping into each other inside the H, it actually does flow, in both directions through the H. When more pressure is on one side, then the other side will have slightly lower pressure, which permits flow to the lower pressure side.
Last edited by Especial86; 05-09-2014 at 02:25 PM.
05-09-2014, 03:23 PM
#13
Here's how I view it, I might be wrong though.
The H acts like an expansion chamber. So when the exhaust from one side of the H flows passed it, any negative pressure on the other side of the H allows the other flowing side to keep moving and aids in the relief of any positive pressure to fight it..
So as the slug of exhaust gas in the H moves left and right, it has a scavenging affect that actually helps "pull" the exhaust out of the manifolds.. Kinda like a game of catch between both sides of the motor.. Gasses are basically pushing and pulling just like an oceans tide...
The H acts like an expansion chamber. So when the exhaust from one side of the H flows passed it, any negative pressure on the other side of the H allows the other flowing side to keep moving and aids in the relief of any positive pressure to fight it..
So as the slug of exhaust gas in the H moves left and right, it has a scavenging affect that actually helps "pull" the exhaust out of the manifolds.. Kinda like a game of catch between both sides of the motor.. Gasses are basically pushing and pulling just like an oceans tide...
I'm sure if someone is wrong, it's likely me before you, but the way I understood it (which "seems" to line up with your diagrams?) is both the H and X pipes are doing the same thing but the X would be more free flowing because there obviously aren't any 90* joints to travel through.
05-09-2014, 05:03 PM
#14
are you saying that the H pipe works better? or just how the H pipe works? I'm sure if someone is wrong, it's likely me before you, but the way I understood it (which "seems" to line up with your diagrams?) is both the H and X pipes are doing the same thing but the X would be more free flowing because there obviously aren't any 90* joints to travel through.
I was just saying how an H pipe works.
I wouldn't say an H works better, but I don't think I'd go so far as saying an X pipe is hands down the best Crossover... I'm sure each one has its own merits in certain applications..
Power wise I'd consider the X pipe to flow a touch better..
Here's a 2005 5.4 3v mustang with both H and X pipes fitted to it...
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uzikaduzi (05-09-2014)
