7.3 Liter Powerstroke MPG Upgrades - Diesel Forum - TheDieselStop.com
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Upgrades and Aftermarket - 99 & up 7.3L Engine Upgrading or adding OEM or aftermarket equipment to your 1999-Up Super Duty or Excursion with 7.3L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 01-14-2011, 04:47 PM   #1 (permalink)
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7.3 Liter Powerstroke MPG Upgrades

Hi Everyone:
A while ago I did some work on my 2001 F350 Super Duty with a 7.3L Powerstroke, auto trans, 4:11 axles, four wheel drive, crew cab and dual rear wheels. I have had the truck since it was new and it now has 117,000 miles on it. The fuel mileage has always been pretty crummy. I decide to see what I could do to improve the MPG. I made these mods:
1) I added an EGT gauge.
2) Installed an Injection pressure fooler. (since removed)
3) I replaced the Intercooler and engine valley boots.
4) Polished the Intercooler/Turbo "Y pipe".
5) And installed a 4" stainless exhaust.
I made a four part Youtube video that chronicles the whole project. Here are the links:





Please Comment, share and "Like" my videos.
Thanks, Mars
P.S. A picture is worth a thousand words and a 10 minute video has about one hundred thousand pictures in it.
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Old 01-15-2011, 08:05 PM   #2 (permalink)
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I don't see how any of these "mods" would increase fuel MPG...

have you since noticed a difference? Aside from a loader exhaust.
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Old 01-18-2011, 12:44 PM   #3 (permalink)
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My recommendation for your next mpg upgrades are a set of Michelin LTX M/S low rolling resistance tires and Bilstein shock absorbers.
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2005 Nomad Rampage toyhauler made by Skyline. 11,500lb gvwr.
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Old 01-19-2011, 12:49 PM   #4 (permalink)
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The only thing that will significantly help your fuel economy is to change those 4:11 gears to a 3:73. 3:55's would be better yet.
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Old 01-21-2011, 11:57 PM   #5 (permalink)
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Quote:
Originally Posted by Anthony7.3 View Post
I don't see how any of these "mods" would increase fuel MPG...

have you since noticed a difference? Aside from a loader exhaust.
Hi Anthony7.3: The overall MPG gains from these mods was fairly small. I did get a slight seat of the pants increase in power. The performance chip (actually a fuel injector fooler) did not increase or decrease the MPG. I sent it back. I did a fairly elaborate MPG test of the various devices and posted videos on Youtube.
Here are the links:




I have other MPG videos in a playlist called:
“HHO MPG Tests”
Go to my channel, I have the Play list set to be one of the first things you see. Here is the link:

mars1952's Youtube Channel

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Old 01-22-2011, 12:09 PM   #6 (permalink)
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“HHO MPG Tests”
hahah, HHO cracks me up. pseudo science at its best! Lets use the alternator to do a totally inefficient process to make fuel to power the alternator. If HHO really worked, cars would run on water and there would be no need for fuel. Sometime I get customer asking for a tune to run HHO. I tell them if HHO really worked the O2 sensors would read it and automatically adjust. Calling water HHO will make any scientist laugh.
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Old 01-23-2011, 09:45 AM   #7 (permalink)
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hahah, HHO cracks me up. laugh.
Hi jgorm: You must mean nitrous oxide (N2O) and apparently you have not watched any of my videos. You can watch them at my Youtube channel. Here is the link:
mars1952's Youtube Channel
Once you get there check out these playlists:
HHO MPG Tests
My first HHO brick
My Second HHO Brick with the Mars Gasket
These videos are pretty long by Youtube standard but the subject can not be covered by a 30 second sound bite.
Thanks for watching, Mars
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Old 01-23-2011, 10:23 AM   #8 (permalink)
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First thing I did was get rid of my 410 rears when I got my truck. Went to 373's and went from 10mpg to 16mpg.......
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Old 01-23-2011, 11:25 AM   #9 (permalink)
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First thing I did was get rid of my 410 rears when I got my truck. Went to 373's and went from 10mpg to 16mpg.......

Hi shoaboat: I would like to have taller gears in the axles but I need the 4:11s for work on the farm. Even with the 4:11 gears it is difficult to manuver a heavy trailer on steep ashphalt. Switching into 4 wheel low helps but then the turning radius is limited.
What I would really like is to have tall axle gears and a 4 speed transfer case that had a 2WD low setting.
Mars
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Old 01-23-2011, 01:35 PM   #10 (permalink)
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Hi jgorm: You must mean nitrous oxide (N2O) and apparently you have not watched any of my videos. You can watch them at my Youtube channel. Here is the link:
mars1952's Youtube Channel
Once you get there check out these playlists:
HHO MPG Tests
My first HHO brick
My Second HHO Brick with the Mars Gasket
These videos are pretty long by Youtube standard but the subject can not be covered by a 30 second sound bite.
Thanks for watching, Mars
Nope, N20 is for real, HHO, or H2O as scientists call it, or water for everyone else, is pseudo science and is 100% BS. Any gains you may claim to get are not statistically significant. I'm sorry if I don't have time to waste watching your long videos, but I am a scientist, and an EFI tuner, and I have proven HHO is BS too many times to start another argument. If HHO worked, even a tiny bit, you could run an engine on the H2, to power the generator, that powers the engine, that runs on its own exhaust (water). I believe Mr. Newton would have to call BS on that as well You don't have to waste time trying to sway us to the dark side so we can all have pretty bubble makers.
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Old 01-29-2011, 08:54 AM   #11 (permalink)
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Aside from a loader exhaust.
Hi Anthony7.3: What is a loader exhaust?
Mars
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Old 01-31-2011, 11:13 PM   #12 (permalink)
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I also made some changes to my 2002 7.3 CC SWB w/3.73. Go to Wal-Mart and get Diesel Kleen fuel additive. It improved my MPG by 1.5 mpg. My 4" turbo back exhaust also helped, but my Banks Ram Air intake only helped .5 mpg. With fuel heading upward to $4 a gal. it is time to find ways to improve mpg. I went from 18 to 20.5 mpg on interstate @ 65mph using cruse.
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Old 02-06-2011, 11:56 PM   #13 (permalink)
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Originally Posted by gadiesel47 View Post
I also made some changes to my 2002 7.3 CC SWB w/3.73. Go to Wal-Mart and get Diesel Kleen fuel additive. It improved my MPG by 1.5 mpg. My 4" turbo back exhaust also helped, but my Banks Ram Air intake only helped .5 mpg. With fuel heading upward to $4 a gal. it is time to find ways to improve mpg. I went from 18 to 20.5 mpg on interstate @ 65mph using cruse.
Hi gadiesel: I paid $3.50 for diesel today.
Mars
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