[Z06] X-pipe question
Thread Starter
Melting Slicks
Joined: Aug 2000
Posts: 2,568
Likes: 0
From: Miami Fl
X-pipe question
I had a costum X-pipe installed on my Z06. The shop put it on right where the pre-cats used to be but kept the H pipe the car comes with.
A couple of my friends have gone to this shop and have done this mod with a nice decrease in e.t. I'm going back to the dyno on Monday to see if I get better than the 338 I got yesterday.
Do you think it would be better to get rid of the H? Have you (or heard of other folks) getting an x-pipe and keeping the H?
[Modified by Pio, 11:56 PM 9/7/2001]
A couple of my friends have gone to this shop and have done this mod with a nice decrease in e.t. I'm going back to the dyno on Monday to see if I get better than the 338 I got yesterday.
Do you think it would be better to get rid of the H? Have you (or heard of other folks) getting an x-pipe and keeping the H?
[Modified by Pio, 11:56 PM 9/7/2001]
Instructor
Joined: Aug 2001
Posts: 130
Likes: 0
Re: X-pipe question (Pio)
Not knowing anyone how has, I don't think it matters.
I may be wrong, but with the flow being equlized by the x-pipe, the "H" now has no major function. Flow will take the path of least resistence. I say don't worry about it.
:jester
[Modified by CRAZYWUGLY, 6:32 PM 9/8/2001]
I may be wrong, but with the flow being equlized by the x-pipe, the "H" now has no major function. Flow will take the path of least resistence. I say don't worry about it.
:jester
[Modified by CRAZYWUGLY, 6:32 PM 9/8/2001]
Pro
Joined: Sep 2000
Posts: 670
Likes: 0
From: Rocklin CA
Re: X-pipe question (Pio)
I have never heard of someone putting an x-pipe in this area unless it replaces the cats completely in which case it would be considered "off-road" or non-emissions legal.
I run the x-pipe in place of my h-pipe, the small, inexpensive one. I can't legitimately say that makes any horsepower for me, but it does substantially reduce the popping I once had with my B&B Triflow PRT exhaust.
If you plan on replacing the h-pipe make sure you purchase a pipe that does not constrict the flow from two pipes to one pipe in that area. I have seen a lot of x-pipes recently in which it appears the two pipes cross over into a space that is really only one pipe in diameter, and then back to two pipes again. The one I have as well as the "bolt-on" types like the Corsa and Bassani don't do this, they have a space inside that is really quite wide, looking from the outside as if the pipes just came together and touched each other.
I run the x-pipe in place of my h-pipe, the small, inexpensive one. I can't legitimately say that makes any horsepower for me, but it does substantially reduce the popping I once had with my B&B Triflow PRT exhaust.
If you plan on replacing the h-pipe make sure you purchase a pipe that does not constrict the flow from two pipes to one pipe in that area. I have seen a lot of x-pipes recently in which it appears the two pipes cross over into a space that is really only one pipe in diameter, and then back to two pipes again. The one I have as well as the "bolt-on" types like the Corsa and Bassani don't do this, they have a space inside that is really quite wide, looking from the outside as if the pipes just came together and touched each other.
Le Mans Master
Joined: Aug 2000
Posts: 5,531
Likes: 1,943
From: Austin Texas
Re: X-pipe question (Pio)
Once the flow has been balanced with an X-pipe, the H-pipe can perform no useful enhancement to the exhaust. If the H-pipe is after the X-pipe it can't even hurt the exhaust flow because exhaust pulses appear at both sides simultaneously, and there is no flow between sides.
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Racer
Joined: Nov 2000
Posts: 335
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From: Effingham, IL IL
Re: X-pipe question (MitchAlsup)
Hotrod had an article on X pipes. The jist of the article was that the close to the exhaust manifold you get the X the better. The H wont hurt you, may help a negligible amount.
Greg :chevy
Greg :chevy