Exhaust Increases
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Exhaust Increases
I am new on this site and thought I would ask a question. I just purchased a new 05' PSD Crew FX4 and I am trying to maximize the fuel mileage that it gets. I does fantastic on the highway getting form 18-22 depending on the speed I go. However in town driving that I do it drop to about 13-15. Huge drop! Since I am doing mostly town driving now I am looking at putting a high flow exaust. My question?
What kind of mileage gains can be expected with a 3.5 down pipe and a 4 inch back pipe and a high flow exhaust?
I got a local quote of $650 installed and would like to know if it is worth the money?
What kind of mileage gains can be expected with a 3.5 down pipe and a 4 inch back pipe and a high flow exhaust?
I got a local quote of $650 installed and would like to know if it is worth the money?
Logistics Pro
Joined: Mar 2004
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From everything I've read, a freer flowing exhaust won't incresae your mileage by a whole lot. It will probably be a pretty negligible increase.
$650 installed... depends on what brand exhaust they're installing. You can get an MBRP system through FTE sponsors, Mark at DPPI is one, and you can install it yourself - they are great systems, for both the performance and sound, and also for the price.
$650 installed... depends on what brand exhaust they're installing. You can get an MBRP system through FTE sponsors, Mark at DPPI is one, and you can install it yourself - they are great systems, for both the performance and sound, and also for the price.
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Originally Posted by ryaneverk2
From everything I've read, a freer flowing exhaust won't incresae your mileage by a whole lot. It will probably be a pretty negligible increase.
$650 installed... depends on what brand exhaust they're installing. You can get an MBRP system through FTE sponsors, Mark at DPPI is one, and you can install it yourself - they are great systems, for both the performance and sound, and also for the price.
$650 installed... depends on what brand exhaust they're installing. You can get an MBRP system through FTE sponsors, Mark at DPPI is one, and you can install it yourself - they are great systems, for both the performance and sound, and also for the price.
No kidding! I have always thought that one of the best things that you can do for fuel mileage is to free up the exhaust.
If that is the case I am not to excited about doing it.
Logistics Pro
Joined: Mar 2004
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Well, that's just from everything I've read. The sponsors who post on various diesel sites tend to say that the gain is negligible, as do experienced users.
That shouldn't discourage you from getting an upgraded exhaust, however. It's one of, if not the best, single mod you can do for the truck. It lowers EGT's by as much as a couple hundred degrees, helps with the turbo spooling up, and not to mention it just sounds SICK.
That shouldn't discourage you from getting an upgraded exhaust, however. It's one of, if not the best, single mod you can do for the truck. It lowers EGT's by as much as a couple hundred degrees, helps with the turbo spooling up, and not to mention it just sounds SICK.
Post Fiend
Joined: Jul 2005
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From: 21791
dont feel scared at doing the install yourself. i was very timid about buying my system for my 7.3 (and remember i was 15 years old) and the installation was much easier than i thought. hardest part was cutting the old system off. i even did the downpipe myself. an even easier method would be to leave the stock components from the catalytic converter- forward, and just get 4'' piping/muffler from there. you NEED to leave the cat on for legal purposes.
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So if I may continue on this for just a moment I am still trying to identify if this is worth doing. It helps spool the turbo faster but I am not sure other than a quicker throttle response why this would be much more value.
What are all the real values to doing an exhaust job?
What are all the real values to doing an exhaust job?
Elder User
Joined: Jan 2005
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From: Dark side of the moon
One is lower EGTs. But that is mainly if you are runnign a chip / tuner.
I have read both they do and do not help mpg, not done the exaust work myself to know for sure.
I have read both they do and do not help mpg, not done the exaust work myself to know for sure.
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The guy at the muffler shop (largest one in town they do tons of diesel exhaust systems) said that he has heard reports anywhere from 1-2 miles per gallon increase.
Can anyone provide in feedback founded on experience as to what typ of gains can be extected?
If the math does not work out over the life of the pickup I will probably leave it stock and put the money somewhere else.
Can anyone provide in feedback founded on experience as to what typ of gains can be extected?
If the math does not work out over the life of the pickup I will probably leave it stock and put the money somewhere else.
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Elder User
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From: Dark side of the moon
I been running numbers through Excel for a week now. For my numbers if I invest about $1k (pipes & tuner) and gain 3mpg I would get a solid payback in umm.. file at home... 40k miles. That was based on $3/gal diesel costs. As diesel goes down the ROI goes up. Long story short... if you keep you truck for 100k miles you are going to get your money back.
Elder User
Joined: May 2005
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From: Tennesee
Motivationteam,
We get calls all the time form customers that get MPG increases from exhaust and intake upgrades, air is still free the more yuo can get thru the engien the better the MPG will be, howe much is the question, and no one can really answer it. Your driving habits, condition of the truck, fuel quality etc etc all effect the MPG and there are so many variables it's impossibel for me to say you'll get "X" MPG. I don't want to say it if I can't prove it every time etc.
What you will get is quicker spool up, potential better MPG, lower EGT (which is one of the ways to better MPG by the way) and a great sounding truck!! Add an intake and a programmer and 3 MPG is a pretty consistent gain. Call us if you want we have all the MBRP exhaust and any other toys you might want for you truck and will be glad to help you with any questions etc.
Mark @ DPPI
We get calls all the time form customers that get MPG increases from exhaust and intake upgrades, air is still free the more yuo can get thru the engien the better the MPG will be, howe much is the question, and no one can really answer it. Your driving habits, condition of the truck, fuel quality etc etc all effect the MPG and there are so many variables it's impossibel for me to say you'll get "X" MPG. I don't want to say it if I can't prove it every time etc.
What you will get is quicker spool up, potential better MPG, lower EGT (which is one of the ways to better MPG by the way) and a great sounding truck!! Add an intake and a programmer and 3 MPG is a pretty consistent gain. Call us if you want we have all the MBRP exhaust and any other toys you might want for you truck and will be glad to help you with any questions etc.
Mark @ DPPI
Elder User
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From: Dark side of the moon
It is very hard to show real numbers. As you read here one person will get up to 22mpg, then the next post is from a guy getting only 15mpg. Point being these exact same 6.0 PSDs are already over the board, you ask 10 people what type of gains they saw and answer will range from -1mpg to +3mpg.
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So what all this is telling me is that I am going to have to take my chances and just hope for the best. One of the things my wife did not like about my last PU is that it was very loud (99 Dodge Cummins) CAT back system.
So I am sure if I brought home my new Ford with a screamin exhaust she would be ticked.
So I have to justify it with real savings.
So I am sure if I brought home my new Ford with a screamin exhaust she would be ticked.
So I have to justify it with real savings.