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  #1 (permalink)  
Old 06-11-2010, 04:58 AM
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X-pipe exhaust upgrade

Was thinking of upgrading to the x-pipe exhaust for my 86 C-10 cause everybody at our local car shows claim to have them, but was curious if it was worth the money as far as sound and performace.

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Old 06-11-2010, 07:43 AM
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no performance difference.

but it will make the exhaust noticeably quieter in the cabin.

and H pipe would be easier.

in general, the H-pipe makes a deeper exhaust note and the x-pipe makes a higher pitched note. x is better for a daily driver.

x's are better but h's are easier and cheaper to install.
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Old 06-11-2010, 08:12 AM
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The X and H pipe was designed for performance, not sound. It is a low pressure zone in the exhaust to help scavenge the exhaust in place of headers and equalize the pressure from both sides of the engine.

Call them "po man's headers" if you will, but in place of no headers, there is a slight performance gain.
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Old 06-11-2010, 08:28 AM
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Here is a site with a comparison between the two. Check on page 2 and 3
http://www.pontiacstreetperformance....p/exhaust.html
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Old 06-11-2010, 08:30 AM
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Besides the power gain, the major change will be in the sound "quality" of the exhaust, from before to after.

Most guys like the sound better with an X or H- I know I do.
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Old 06-11-2010, 06:59 PM
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ideal performance location for X or H is where the temp is highest
which is usualy around the mid or back 3rd of the trans
you might be able to put an H there
you can not put an X there

usualy both are located behind the trans for sound or ego
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Old 06-11-2010, 10:23 PM
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Either sounds good, they smooth out the exhaust note considerably.
I have a 2 1/2" x system on my 93 Chevy, And I have a 3" H system on my 85 Chevy with Pypes Violators.
Shane
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Old 06-11-2010, 10:29 PM
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If you want to find the hottest place on the exhaust, spray paint a line of white paint down the exhaust pipes. The hottest section will melt and bubble the paint off.
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Old 06-11-2010, 11:09 PM
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Quick, lock the thread before it gets ugly again!
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Old 06-12-2010, 01:16 AM
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My crossover is mounted just after the transmission. I did find this info that might help:
Dr. Gas recommends location of crossover should be after transmission and crossmember have been cleared. Which usually is 12" to 36" after collector flanges
http://drgas.com/docs/X-Pipe_Instructions.pdf
Also:
Dr. Gas, lnc. has developed a new generation of crossovers that uses a tangentlally siamesed junction, in place of
the H or over-and-under X. lt evenly splits, smoothes, and synchronizes exhaust pressures at all engine speeds.
The high and low pressure pulses in the two pipes are evenly imposed on each other, leveling out the pulse time
history pressure differences between right and left cylinder banks: Re-synchronizing the exhaust pulses reduces
back pressure, cancels sound, and provides additional scavenging. Tests have shown up to 6 dBa (75%) reduction
in sound levelsl Horsepower, economy, and throttle response are improved. Exhaust flow after the crossover is
compietely srnoothed out. The job the headers started is finished.
http://drgas.com/docs/In_Sync.pdf
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Old 06-12-2010, 03:28 AM
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Originally Posted by sqzbox
Quick, lock the thread before it gets ugly again!
I dont get it
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Old 06-12-2010, 05:21 AM
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Quote:
Originally Posted by cobalt327
Besides the power gain, the major change will be in the sound "quality" of the exhaust, from before to after.

Most guys like the sound better with an X or H- I know I do.
I know your right. I'd bet it applies 99.99999% of the time. HOWEVER,I was told that when I ran the headers right into cherry bombs and out each side with a 2 1/2 elbow it would sound tinny. Its got the deepest thumpiest (new word) growl of anything on the street around here. Go figure. I did it as a temporary thing that I now figure is permenant
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Old 06-12-2010, 10:39 AM
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Quote:
Originally Posted by sooper
I know your right. I'd bet it applies 99.99999% of the time. HOWEVER,I was told that when I ran the headers right into cherry bombs and out each side with a 2 1/2 elbow it would sound tinny. Its got the deepest thumpiest (new word) growl of anything on the street around here. Go figure. I did it as a temporary thing that I now figure is permenant
Sooper, I don't doubt you- there's few things more subjective than the sound of an exhaust system! That's why there are two dozen different manufacturers all selling exhaust systems- to each his own.

That said, putting the muffler as far away from the engine as the exhaust system will allow is an accepted way to go about making the best of a muffled exhaust system. If your exhaust system consists of headers and a pair of glass packs, w/turnouts on the end, then I guess that's as far from the engine that you can get the mufflers- given the abbreviated nature of your exhaust system.

However, many guys will not want to opt for such a system- there's the possibility of resonance/exhaust drone from under the car (some don't like/want all the "thumping"), the exhaust exit might not pass the local jurisdiction's requirements of the exhaust exit location (many locales require the exit to be behind the axle at least, and behind the body of the car in many cases), the sound "quality" might not be what someone else likes, it may be too loud for the local LE, there's no possibility of using a crossover so the advantages of that is lost, et cetera.

But again- to each his own.
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Old 06-12-2010, 11:22 AM
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cross over location

AM muscle, A few mo. back someone poste a Q on how to find the best location for a crossover pipe and it went on for 4 pages. It got ugly and one person got locked out of the site for a few weeks. lots of mud slinging.

Doublevision's post brought back bad memories I hope aren't repeated again.

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Old 06-12-2010, 06:01 PM
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Sorry, I certainly wasn`t trying to start anything. We had used that method before and it seemed to work okay for us, I can understand everyone`s got there different view of things. In the real world it likely don`t make much difference where a H pipe gets put on.
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