Exhaust
Exhaust
Senior User
Joined: Dec 2004
Posts: 399
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From: New York
all depends on how loud you want it, alot of people have the HOG exhaust, but its pretty loud, i heard that MBRP, Magnaflow and Banks all have good exhausts as well. but its all up to your preferences. i heard that most people go with a cat back instead or a turbo back because of the turbo that the 6.0 uses, but you only get about 75% of the power with the cat back instead of the turbo back, but it wont make a big difference
Mountain Pass
Joined: Feb 2004
Posts: 121
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To each his own. That is a tuff question to answere since everyones taste is different and they will think there sounds the best. I have the Magnaflow turbo back without the cat and enjoy it. It is a louder than stock, has insane turbo wistle and has no bad sound when normal cruising. Looks damn good to.
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New User
Joined: Jan 2005
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Originally Posted by nosdog2
To each his own. That is a tuff question to answere since everyones taste is different and they will think there sounds the best. I have the Magnaflow turbo back without the cat and enjoy it. It is a louder than stock, has insane turbo wistle and has no bad sound when normal cruising. Looks damn good to.
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New User
Joined: Jan 2005
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Originally Posted by F-250 diesel
all depends on how loud you want it, alot of people have the HOG exhaust, but its pretty loud, i heard that MBRP, Magnaflow and Banks all have good exhausts as well. but its all up to your preferences. i heard that most people go with a cat back instead or a turbo back because of the turbo that the 6.0 uses, but you only get about 75% of the power with the cat back instead of the turbo back, but it wont make a big difference
Senior User
Joined: Dec 2004
Posts: 399
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From: New York
i heard the HOG is the lodest out of all of them and the banks is the most quiet until you put your foot into it....but thats what i heard. nosdog2, isnt it that if you take the cat out and get caught youll get hit with a rediculous fine by the feds??? i heard of people taking out the muffler, will this do anything
FTE Leadership Emeritus
Joined: Jan 2003
Posts: 161,999
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From: 3rd Rock
Originally Posted by Need4speed_gsxr
What is the best exhaust for the 6.0
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Senior User
Joined: Mar 2004
Posts: 356
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I had a flo pro put on a few weeks ago. It is was just the muffler, tail pipe, and tip. 4" pipe with a 5" tip. Not much different from stock at all. I am going to go cat back with 4" this spring. The guy who did it for me has done a few gas engines for me and I loved them. Mine has a cat which is stock 3". He said that is where the restricition is and anything you do before the cat isn't going to do much. I wouldn't mind a little more noise. I like the turbo whine. How can I make this louder? Looks really good from outside. Levi
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Postmaster
Joined: Aug 2003
Posts: 4,483
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From: Central Texas
Keep in mind these engines need exhaust back pressure. If the PCM doesn't read sufficient back pressure, the vanes in the turbo won't go wide open. Could be the cause of the insane whistle. Did you read the post on the shortage of replacement turbos. Is there a cause and effect?
Postmaster
Joined: Aug 2003
Posts: 4,483
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From: Central Texas
Originally Posted by Springer
Where is the back pressure sensor? I've never heard of an engine needing back pressure.
http://dan.prxy.org/Truck/6L_bible_h.../Page_058.html
The sensor is located on the driver side front of the engine. The sensor has a tube that goes down to the driver side exhaust manifold.
From the service manual: Exhaust Pressure Sensor
The Exhaust Pressure (EP) sensor is a variable capacitor sensor that is supplied a 5-volt reference signal by the PCM and returns a linear analog voltage signal that indicates pressure. The EP sensor measures the pressure in the LH exhaust manifold.
An open or short in the EP sensor wiring will result in a low out of range voltage at the PCM.
Last edited by SBV45; Jan 27, 2005 at 02:51 PM.
Freshman User
Joined: Jan 2005
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Thanks for the link! Lots of good info there. I'd like to see what the input for EP does to the VGT output though. I couldn't find anything that describes the control algorithims. My guess would be that lower back pressure would cause the turbo guide vanes to open faster since the turbo can spool up faster with less back preasure.
Postmaster
Joined: Aug 2003
Posts: 4,483
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From: Central Texas
Originally Posted by Springer
Thanks for the link! Lots of good info there. I'd like to see what the input for EP does to the VGT output though. I couldn't find anything that describes the control algorithims. My guess would be that lower back pressure would cause the turbo guide vanes to open faster since the turbo can spool up faster with less back preasure.
Freshman User
Joined: Jan 2005
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Yes of course, I should have thought that out some more. The sensor is ahead of the turbo so it is used to ensure the proper exhaust velocity to the turbine blades.
But this does not mean that the exhaust after the turbo needs restriction. The turbo itself will always present some restriction to flow. Even if there is zero pressure on the outlet of the turbo there will still be pressure in the manifold.
But this does not mean that the exhaust after the turbo needs restriction. The turbo itself will always present some restriction to flow. Even if there is zero pressure on the outlet of the turbo there will still be pressure in the manifold.
