Dual Exhaust Type

RedNismo · 04-12-2010, 09:09 PM

What is considered a real dual exhaust? Does the Nismo Z have a real dual exhaust?

m4a1mustang · 04-12-2010, 09:11 PM

Quote:

Originally Posted by RedNismo

What is considered a real dual exhaust? Does the Nismo Z have a real dual exhaust?

"True Dual" exhaust setups don't have a mid-pipe crossover.

nogoodname · 04-12-2010, 09:13 PM

Quote:

Originally Posted by RedNismo

What is considered a real dual exhaust? Does the Nismo Z have a real dual exhaust?

I'm sure wikipedia has this but anyways, m4a1mustang is right about the true duals.

Trips · 04-12-2010, 09:15 PM

RedNismo · 04-12-2010, 10:12 PM

If that's the case, very few sports cars have dual exhaust. Even the Skyline GTR and M3 has either a X or H pipes. What's the advantage/disadvantage of having a true dual exhaust.

sinceday1 · 04-12-2010, 11:13 PM

Crossover will help scavenging and allow to produce some extra power at higher end.

It depends on the engine design and firing pattern but carefully designed exhaust system and position of the X or H pipe will cancel out resonance and make less noise inside the cabin as well. Deducing from that True dual should have louder/more aggressive note and should have more in-cabin noise.

I have Agency Power true dual exhaust BTW. I thought it was going to have 'some' drone but after talking to one of other member who installed AP exhaust, I realized that the video they posted was not an accurate representation of in-cabin noise. After burning off some residues (watever it is inside the muffler/resonator that was burning) I have practically zero drone, and exhaust actually quieted down a lot, which i thought would be otherwise. As far as HP/TQ gain goes, we might be able to compare the difference with H/X after I get it dyno-ed with HFC install. If I'm not too happy with the result, I might get my buddy to fab up some X or H pipe and put'em on.

Nevertheless, I think it all depends on the quality of the steel and design of the exhaust and varying size of resonator/muffler.

"H pipe produces higher low end torque whereas X pipe produces higher torque in higher speed."

Take my advice for a grain of salt, I'm no expert mechanic, but from my understanding, difference of HP/TQ in our engine doesn't seem to create immense amount of change with or without X pipe.
But it seems, in certain cases, depending on the design of the exhaust, H pipe introduce some rasp or "farts" to our engine (research videos!)

"True" dual will produce more aggressive sound and steeper torque curve partially due to loss in low end torque and thereby produce lower 'hp' gain from calculation.

04-12-2010, 09:09 PM	#1 (permalink)
RedNismo Base Member Join Date: Jan 2010 Location: Glendale CA Posts: 92 Drives: 09 Nismo Z #389 RD Rep Power: 15	Dual Exhaust Type What is considered a real dual exhaust? Does the Nismo Z have a real dual exhaust? __________________ 2003 Skyline 350GT--Tein Suspension, NRG Strut bar, Nismo CAI w/bypass, JDM emblems, Nismo Graphics... 2009 Nismo Z34 #389-- Clear Bra

04-12-2010, 09:15 PM	#4 (permalink)
Trips Administrator Join Date: May 2009 Location: Disneyland, Ca Posts: 8,728 Drives: 🔰 Rep Power: 10	__________________

04-12-2010, 10:12 PM	#5 (permalink)
RedNismo Base Member Join Date: Jan 2010 Location: Glendale CA Posts: 92 Drives: 09 Nismo Z #389 RD Rep Power: 15	Exhaust If that's the case, very few sports cars have dual exhaust. Even the Skyline GTR and M3 has either a X or H pipes. What's the advantage/disadvantage of having a true dual exhaust. __________________ 2003 Skyline 350GT--Tein Suspension, NRG Strut bar, Nismo CAI w/bypass, JDM emblems, Nismo Graphics... 2009 Nismo Z34 #389-- Clear Bra

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Ark Performance - Type 2 Stainless Steel True-Dual Exhaust	DriveLineEric	Group Buys	154	10-04-2012 01:02 AM
AAM Comp. Exhaust Sale: 2.5" and 3'' True Dual Exhaust Exhaust, HFC and Test Pipes!	Rob@Altered	Exhaust/Intake	33	04-02-2012 07:03 PM
Just received the new Ark Type 2 Grip True Dual exhaust	Zeto	Intake/Exhaust	74	09-03-2011 03:10 AM
Ark Technologies Type 2 Exhaust installed!	chris410	Intake/Exhaust	29	03-28-2010 08:40 PM
Zele International’s FZ-Titanium Type-2 Exhaust for 370Z Z34	AK370Z	Intake/Exhaust	21	01-09-2009 04:56 PM

04-12-2010, 11:13 PM	#6 (permalink)
sinceday1 Track Member Join Date: Oct 2009 Location: Canada Posts: 514 Drives: 09 Nissan 370Z M6 Rep Power: 16	Crossover will help scavenging and allow to produce some extra power at higher end. It depends on the engine design and firing pattern but carefully designed exhaust system and position of the X or H pipe will cancel out resonance and make less noise inside the cabin as well. Deducing from that True dual should have louder/more aggressive note and should have more in-cabin noise. I have Agency Power true dual exhaust BTW. I thought it was going to have 'some' drone but after talking to one of other member who installed AP exhaust, I realized that the video they posted was not an accurate representation of in-cabin noise. After burning off some residues (watever it is inside the muffler/resonator that was burning) I have practically zero drone, and exhaust actually quieted down a lot, which i thought would be otherwise. As far as HP/TQ gain goes, we might be able to compare the difference with H/X after I get it dyno-ed with HFC install. If I'm not too happy with the result, I might get my buddy to fab up some X or H pipe and put'em on. Nevertheless, I think it all depends on the quality of the steel and design of the exhaust and varying size of resonator/muffler. "H pipe produces higher low end torque whereas X pipe produces higher torque in higher speed." Take my advice for a grain of salt, I'm no expert mechanic, but from my understanding, difference of HP/TQ in our engine doesn't seem to create immense amount of change with or without X pipe. But it seems, in certain cases, depending on the design of the exhaust, H pipe introduce some rasp or "farts" to our engine (research videos!) "True" dual will produce more aggressive sound and steeper torque curve partially due to loss in low end torque and thereby produce lower 'hp' gain from calculation.