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Custom Dodge Ram Performance Mods - Engine - 4.7 Liter V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 4.7-liter V8 engine - 310 horsepower, 330 lb-ft of torque.


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  #1  
Old 06-17-2013, 07:05 PM
TurboTony84 TurboTony84 is offline
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Default H-pipe setup on a 4.7?

ive been doing some research on dual exhaust setups for the 4.7 v8. has anyone built an H pipe setup for one? is it even worth doing? just curious for magnaflow and flowmaster only have setups with one cat, and one muffler. to me it looks like 2 Y pipes connected in the middle. is it because its a smaller displacement motor then lets say, the 5.7 HEMI? im sure im not the only one who has thought about this...
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  #2  
Old 06-17-2013, 07:29 PM
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brandonjansen brandonjansen is offline
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I'm assuming you mean you want to run a true dual set up rather than the stock Y-pipe and SI/SO muffler.

I'm not 100% sure on how exhaust set up is on the 2nd gens. My guess is a Y-pipe after the exhaust manifolds, into a cat, then a SI/SO muffler and single side exit pipe. The hemi's are no different than the 4.7's. Even on the 4th gens the lower trim model hemi's come with pretty much the same set up (just with dual cats before the Y-pipe).

If you want dual exhaust out the back I would just leave your stock set up and do a cat back system with a SI/DO muffler. There's not really a need to do a full true dual set up on these trucks, especially with a 4.7.

Now to the part you were referring too... the H-pipe or X-pipe. If you have a true dual set up you should have either an H-pipe or X-pipe for scavenging purposes. They help the exhaust flow better by using one exhaust flow to help pull the other side.
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  #3  
Old 06-18-2013, 09:39 PM
TurboTony84 TurboTony84 is offline
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thats good to know. its been something that kinda bugged me since i got my ram last year. i like my truck, and will keep the system as is for now. i installed a flowbastered a couple weekends ago. got a good deal on it and thought why the hell not. wonder if anyone here on the forum has a true dual setup.
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Old 06-18-2013, 09:46 PM
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Here's some information you just may find usefull -

H Pipe:

An H pipe helps equalize the exhaust pressures between the two banks of tubing as the hot gases and sound waves travel down the tubing. This, in effect, relieves the exhaust pressures as they travel through the H tubing, generally creating an increase in torque. This will also give an added sound reduction when the sound waves combine inside the H tubing.

X Pipe:

An X pipe will actually help to scavenge exhaust pulses from one bank as the opposite exhaust pulse passes through the X, thus creating a vacuum effect at the valve, resulting in a cleaner burn in the cylinder. This generally equals added torque and, like the H pipe, a reduction in sound as the sound waves combine in the X pipe.

Y Pipe:

The Y pipe, which works well on several applications, utilizes a dual exhaust off of the manifolds/ headers and runs back a specified distance, then the two pipes enter the Y pipe and become one larger pipe. This Y helps each bank to scavenge the other as the pulses travel down through the Y and are joined together into the single common tubing. This creates a vacuum in the exhaust valve, resulting in a cleaner burn in the cylinder. A sound reduction is also achieved as the sound waves combine in the Y pipe.

Personally, I've had both in the past and the biggest difference I've found between an H & X pipe is predominantly sound. As long as all things are equal, there's no significant difference in performance between the two.

Good luck.
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Old 06-18-2013, 09:52 PM
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dual exhaust doesn't really perform any better than a y pipe setup. It's more for sound.
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Old 06-18-2013, 10:05 PM
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Mustang owners, Viper owners, GTO owners and 5th Gen Vette' owners [just to throw out a few] would staunchly AND venomously disagree with you.....
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Old 06-18-2013, 10:09 PM
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I know they would

I've seen dyno of comparison between y pipe and x pipe, and it was less than a 5hp difference held pretty much at all rpms.
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Old 06-18-2013, 10:52 PM
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Quote:
Originally Posted by TurboTony84 View Post
ive been doing some research on dual exhaust setups for the 4.7 v8. has anyone built an H pipe setup for one? is it even worth doing? just curious for magnaflow and flowmaster only have setups with one cat, and one muffler. to me it looks like 2 Y pipes connected in the middle. is it because its a smaller displacement motor then lets say, the 5.7 HEMI? im sure im not the only one who has thought about this...
I just cut out my Y Pipe and put in a DI/DO Magnaflow. Sounds awesome! Not a true dual exhaust, but as close as I'm gonna get on a budget (and a wife).
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