Does an x make a difference or am I loosing my mind? - Mustang Evolution

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Old 08-20-2015, 05:34 PM   #1
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Does an x make a difference or am I loosing my mind?

Today I installed a pypes 3" x to my existing off road 3" cat deletes. The factory h was something like 2.75" I believe and was hands down louder in the low rpm range. But after installing the x I feel like it's quieter from 1k to 3,500k rpms, and I feel like I lost bottom end power. However it feels like it's pulling harder from 5k and up. I don't get it.. I don't see how a mid pipe can make that much of a difference. Am I going crazy or does a mid pipe really make a difference on the coyote..
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Old 08-20-2015, 06:22 PM   #2
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Today I installed a pypes 3" x to my existing off road 3" cat deletes. The factory h was something like 2.75" I believe and was hands down louder in the low rpm range. But after installing the x I feel like it's quieter from 1k to 3,500k rpms, and I feel like I lost bottom end power. However it feels like it's pulling harder from 5k and up. I don't get it.. I don't see how a mid pipe can make that much of a difference. Am I going crazy or does a mid pipe really make a difference on the coyote..

It did on my car, my tq was like 11 off from my Hp when I got my car dyno tuned.


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Old 08-20-2015, 06:31 PM   #3
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So was that a gain or a loss

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Old 08-20-2015, 07:27 PM   #4
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Common talk is H pipe is lower end torque and lower grunt sound; X-pipe is for High RPM gains with other high RPM mods like Boss Intakes etc, and they tend to be more Zinggy in sound then grunty

Edit: and yes you will lose low end Torque as with all high RPM mods like Boss Intakes etc...
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Old 08-20-2015, 07:46 PM   #5
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So was that a gain or a loss

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Large gain


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Old 08-21-2015, 06:51 AM   #6
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Large gain


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Was that sarcasm?
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Old 08-21-2015, 08:50 AM   #7
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Was that sarcasm?

Not at all these cars make like 360-370 hp to the wheel and like 320ish tq if I'm not mistaking


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Old 08-21-2015, 08:52 AM   #8
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Dam.. this x pipe is making me want to buy the boss 302 intake mani and lt's now

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Old 08-21-2015, 09:06 AM   #9
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At the track I'm running faster times then other 5.0's with the Boss intake, CAI, catless H-pipe and a tune. All I have are longtubes, catless X-pipe, and a tune.


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Old 08-22-2015, 04:46 AM   #10
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I found this http://youtu.be/2crCWF5cmLk


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Old 08-23-2015, 10:03 AM   #11
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Quote:
Originally Posted by 94gtconvert View Post
Today I installed a pypes 3" x to my existing off road 3" cat deletes. The factory h was something like 2.75" I believe and was hands down louder in the low rpm range. But after installing the x I feel like it's quieter from 1k to 3,500k rpms, and I feel like I lost bottom end power. However it feels like it's pulling harder from 5k and up. I don't get it.. I don't see how a mid pipe can make that much of a difference. Am I going crazy or does a mid pipe really make a difference on the coyote..
X pipes will always be a little quieter than H pipes because the exhaust pulses are forced to intersect at the X junction. Some sound waves will crash into each other at the junction and cancel out. It has the side effect of acting like a mini muffler. This is why the X pipe setup is perceived to have a smoother sound by some than the H pipe.

I did back to back testing on my previous vehicle, a Procharged 5.4L F-150 with full custom exhaust. Divorced true duals, custom X pipe, and then custom H pipe. The Divorced true dual system was the best sounding/loudest but probably not the most efficient since it had no crossover. I noticed the X piped system was immediately quieter and lost a lot of raw tone to it, but it was smoother sounding. Lastly, the H piped system sounded like a compromise of the previous two, gaining some of the tone back.
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