spoonerock
11-21-2005, 03:03 PM
ChargerSXT asked me this question on another thread, so I thought it might be appropriate to address this topic as a separate item:
Spoon,
First, let me say that I am not trying to be a smart a$$ here. I just want to clarify something for my own edification (and possibly others that may also be confused). I am confused about the correct definition of a "true dual" system. :confused: The MOPAR dualy catback system replaces the "Y" pipe (from the OEM single exhaust system) with a muffler that has 2 inlets and two separate outlets that exit through dual resonators and tips. Is that not a "true dual" system? Again, I'm not trying to be sarcastic, so I appologize if my question comes across as such...
BK
I know this is somewhat a confusing subject. One that only us V6 owners seem to have to deal with.......I am by no means a subject matter mechanic expert on this topic, so I would welcome any further clarification or corrections to my limited knowledge on the subject, so here goes:
What is a "true" dual exhaust cat back system?
The goal of a performance cat back system is to create as much free flowing exhaust from the engine as possible (minimizing back pressure on the engine). Less pressure = more HP.
Like our V8 HEMI bretheren, the V6 has two cylinder heads, two exhaust manifolds, and two catalytic converters. A true dual setup creates an independent exhaust system for each engine head. Exhaust passes from the Catalytic Converters to an "X" pipe, then to two muffers that exit to two tail pipes. These systems may, or may not have an additional resonator for each depending on how aggressive sounding the owner wants the system to be.
What is a "semi" dual cat back exhaust system?
The exhaust from the two catalytic converters is channeled into a "Y" pipe that enters a single muffler. The muffler has two exhaust exits that run back to the exhaust tips. As before, these system may, or may not have resonators. A caveat to this scheme would be, instead of a "Y" pipe, the single muffler has two sets of exhaust inlets and outlets.
The reason these system are not available on the Hemi engines is because of increased back pressure on the engine, and resulting reduction in HP.
What is a "single" cat back exhaust system?
The exhaust from the two catalytic converters is channeled into a "Y" pipe that enters a single muffler. The muffler has one exhaust exit that run back to a single tips. Most of the system I have seen for this set-up do not have resonators, so they tend to be very aggressive sounding.
The reason this system are not available on the Hemi engines is because of increased back pressure on the engine, and resulting reduction in HP.
So here is the $100K question.....Why are there so few "true" dual exhaust systems for the V6?
With out knowing for sure, I would speculate that the V6 doesn't generate enough exhaust (or back pressure) to require one. Put another way, you probably wouldn't get much more free flowing exhaust to add any additional significant HP.
With all that said.......a "true" dual set-up looks and sounds cool, but there is a performance ceiling that the set-up cannot take advantage of because of the engine.
The "semi" exhast set-up looks cools, and takes full advantage of the performance gains, but may be less aggressive sounding because the exhaust note (exhaust pressure) is divided by the two tips.
The "single" exhaust set-up looks wierd (yes I admit it), but sounds very cool while enjoying the probable same performance gains as the "semi".
Don't know if this makes things any more clear, or if the waters are now more muddied? :happy:
Spoon,
First, let me say that I am not trying to be a smart a$$ here. I just want to clarify something for my own edification (and possibly others that may also be confused). I am confused about the correct definition of a "true dual" system. :confused: The MOPAR dualy catback system replaces the "Y" pipe (from the OEM single exhaust system) with a muffler that has 2 inlets and two separate outlets that exit through dual resonators and tips. Is that not a "true dual" system? Again, I'm not trying to be sarcastic, so I appologize if my question comes across as such...
BK
I know this is somewhat a confusing subject. One that only us V6 owners seem to have to deal with.......I am by no means a subject matter mechanic expert on this topic, so I would welcome any further clarification or corrections to my limited knowledge on the subject, so here goes:
What is a "true" dual exhaust cat back system?
The goal of a performance cat back system is to create as much free flowing exhaust from the engine as possible (minimizing back pressure on the engine). Less pressure = more HP.
Like our V8 HEMI bretheren, the V6 has two cylinder heads, two exhaust manifolds, and two catalytic converters. A true dual setup creates an independent exhaust system for each engine head. Exhaust passes from the Catalytic Converters to an "X" pipe, then to two muffers that exit to two tail pipes. These systems may, or may not have an additional resonator for each depending on how aggressive sounding the owner wants the system to be.
What is a "semi" dual cat back exhaust system?
The exhaust from the two catalytic converters is channeled into a "Y" pipe that enters a single muffler. The muffler has two exhaust exits that run back to the exhaust tips. As before, these system may, or may not have resonators. A caveat to this scheme would be, instead of a "Y" pipe, the single muffler has two sets of exhaust inlets and outlets.
The reason these system are not available on the Hemi engines is because of increased back pressure on the engine, and resulting reduction in HP.
What is a "single" cat back exhaust system?
The exhaust from the two catalytic converters is channeled into a "Y" pipe that enters a single muffler. The muffler has one exhaust exit that run back to a single tips. Most of the system I have seen for this set-up do not have resonators, so they tend to be very aggressive sounding.
The reason this system are not available on the Hemi engines is because of increased back pressure on the engine, and resulting reduction in HP.
So here is the $100K question.....Why are there so few "true" dual exhaust systems for the V6?
With out knowing for sure, I would speculate that the V6 doesn't generate enough exhaust (or back pressure) to require one. Put another way, you probably wouldn't get much more free flowing exhaust to add any additional significant HP.
With all that said.......a "true" dual set-up looks and sounds cool, but there is a performance ceiling that the set-up cannot take advantage of because of the engine.
The "semi" exhast set-up looks cools, and takes full advantage of the performance gains, but may be less aggressive sounding because the exhaust note (exhaust pressure) is divided by the two tips.
The "single" exhaust set-up looks wierd (yes I admit it), but sounds very cool while enjoying the probable same performance gains as the "semi".
Don't know if this makes things any more clear, or if the waters are now more muddied? :happy: