X pipe design shape

[BrakeFade]

I don't think it really matters. All exhaust pulses enter the center and equalize in the middle of the X upon exit. On an H pipe, there is equalization but it's obvious not all exhaust pulses enter the center "chamber". You'll see differences only in X vs H rather than X vs X. I have a feeling increased backpressure plays a role in the X equalization chamber, thus why you get a little more power out of an X vs H.

I am an engineer, but in no way shape or form an exhaust engineer. I'm just using dumb logic out of my pea sized child like brain (as my wife would say).

Sponsored

 

[K4fxd]

I'm just using dumb logic out of my pea sized child like brain (as my wife would say).

Properly designed the pulses in one pipe cause a low pressure area in the other pipe.

 

[BrakeFade]

Properly designed the pulses in one pipe cause a low pressure area in the other pipe.

I would think this is true only in the H design. If pulses on one side are flowing at a higher rate, a venturi effect would cause low pressure on the other side. I bet you see higher flow rates out of an H.

 

[GregO]

Btw didn't even know exhaust science was a thing. Is it more of a hobby like radio people or is it an actual thing?

To bad this isn’t a Two-Stroke forum, we could get all slap silly posting about expansion chambers, sound wave reflection and cylinder scavenging while debating fuel premix ratios. LOL

 

[GregO]

H pipe X pipe or straight pipe, unfortunately the issue is the Mustang V8 and rear mounted transmission put the crossover to far away to be effective. It’s mostly all tumble and roll gasses at that long of a distance. The H or X or straight pipe becomes a tuning tool for desired sound at this point.
The FabSpeed Porsche example places the crossover in the effective zone, no transmission in the way and no long header connection tubes snaking around the trans that meet up near the output yoke.

 

[Hoofer]

 

[GregO]

That video with a 4V 8000+ rpm Coyote.
The 6500 rpm chop leaves a person wondering what’s going on past that rpm.
Too bad they didn’t test a True X.
BTW I’ve never watched Engine Blasters ever in my life until Hoofers post.

 

[FUN2RIDEFAST]

I have the MBRP WHIT H-PIPE

Absolutely. The difference in bends between one manufacturer and another effects the harmonics big time. Also the combinations of axle back brands coupled with pipe brands throws another harmonic factor into the equation. I'm running Roush Axle backs and American Muscle X pipe and I really like the sound. I've had it on for six years and it still looks great. Good luck.

Sponsored