Engine flash affect fuel mileage? - Diesel Truck Forum - TheDieselGarage.com
Thread Details Posted by Joe/GA, this thread has received 10 replies and been viewed 2559 times.

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 11 (permalink) Old 11-24-2011, 10:42 AM Thread Starter
Junior Member
 
Join Date: Feb 2011
Posts: 33
Points: 22,471
Thanks: 0
Thanked 0 Times in 0 Posts
Garage
Engine flash affect fuel mileage?

I believe the truck that I just bought has been sitting on the lot for a good while. So, I have to wonder if it has had the programing flash to make it produce 400 HP and 800 ft lb of torque. My question to those of you that bought the early builds and then had the flash is this: Did it affect your fuel mileage in any way? My truck has all the power that I need right now, since I'm only hauling 8500 pounds. However, I do plan to get a bigger heavier 5th wheel camper in a year or two and I'll want all the power I can get! What do y'all think?

2015 F-350 Lariat CC, LWB, DRW
Joe/GA is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 11-26-2011, 02:04 AM
Junior Member
 
Join Date: Aug 2010
Posts: 3
Points: 11,881
Thanks: 0
Thanked 0 Times in 0 Posts
Garage
Remember, thats a MAX HP and TQ figure. As long as you dont lock your foot to the floorboard with the fuel pedal in between, the mileage would be the same, given the exact conditions of course.

Leo
snakedriver is offline  
post #3 of 11 (permalink) Old 11-26-2011, 02:45 AM
Junior Member
 
Join Date: Nov 2009
Posts: 3,533
Points: 70,107
Thanks: 69
Thanked 655 Times in 578 Posts
I beg to differ, a friend of mine has a very early 6.7 with the original tune, there were three trucks bought at the same time these are work trucks, for a logging operation and one of them got his truck reprogrammed to the 400/800 and the fuel mileage dropped like a rock. The three of them all work at the same operation and most of the time are about the same weight, going over the same roads, and up logging roads in 4 wheel drive. The two with the original program burn less fuel.

1988 ford van fresh overhaul, 1991 nissan pick-up 1993 Caprice 2000 GMC S10 Blaser 2007 nbs 3500 GMC 4x4 crew-cab long box 17 inch single wheels Duramax Alison. BW turnover Ball. Furakawa FL35 loader. Retired, HD mechanic, worked on engines all my life. Fabricator welder. electrician. in the process of finishing my new shop. Live in Rock Creek B.C. Wife has a fruit stand.
Johnp3 is offline  
post #4 of 11 (permalink) Old 11-26-2011, 02:49 AM
Junior Member
 
Join Date: Aug 2010
Posts: 3
Points: 11,881
Thanks: 0
Thanked 0 Times in 0 Posts
Garage
I was affraid somebody was going to say that!

I stand corrected.

Leo
snakedriver is offline  
post #5 of 11 (permalink) Old 11-26-2011, 03:09 AM
Junior Member
 
Join Date: Nov 2009
Posts: 3,533
Points: 70,107
Thanks: 69
Thanked 655 Times in 578 Posts
The one truck goes up the mountain every day with a full load of fuel and tools he runs heavy. He loves the truck, and with me having a GMC we get to squabble.

1988 ford van fresh overhaul, 1991 nissan pick-up 1993 Caprice 2000 GMC S10 Blaser 2007 nbs 3500 GMC 4x4 crew-cab long box 17 inch single wheels Duramax Alison. BW turnover Ball. Furakawa FL35 loader. Retired, HD mechanic, worked on engines all my life. Fabricator welder. electrician. in the process of finishing my new shop. Live in Rock Creek B.C. Wife has a fruit stand.
Johnp3 is offline  
post #6 of 11 (permalink) Old 11-26-2011, 09:58 AM Thread Starter
Junior Member
Threadstarter
 
Join Date: Feb 2011
Posts: 33
Points: 22,471
Thanks: 0
Thanked 0 Times in 0 Posts
Garage
Thanks for the replies, guys. I was thinking, like Snakedriver, that I would just have to keep my foot out of it. It seems to have awesome power, as it is. What were the original specs for HP and torque? How can I find out what I have?

2015 F-350 Lariat CC, LWB, DRW
Joe/GA is offline  
post #7 of 11 (permalink) Old 11-26-2011, 04:24 PM
Junior Member
 
Join Date: Nov 2009
Posts: 3,533
Points: 70,107
Thanks: 69
Thanked 655 Times in 578 Posts
There will be an EPA decal under the hood somewhere, it gives the torque and HP at what reves and the fuel burn rate at max HP.

1988 ford van fresh overhaul, 1991 nissan pick-up 1993 Caprice 2000 GMC S10 Blaser 2007 nbs 3500 GMC 4x4 crew-cab long box 17 inch single wheels Duramax Alison. BW turnover Ball. Furakawa FL35 loader. Retired, HD mechanic, worked on engines all my life. Fabricator welder. electrician. in the process of finishing my new shop. Live in Rock Creek B.C. Wife has a fruit stand.
Johnp3 is offline  
post #8 of 11 (permalink) Old 11-27-2011, 06:32 PM
Tebow-in'...
 
mudguppy's Avatar
 
Join Date: Dec 2008
Location: duncan, SC
Posts: 1,243
Points: 32,344
Thanks: 173
Thanked 142 Times in 105 Posts
John - i know you swear this sticker is there, but it still seems as though no one can find it.

Travis
---------------------------------------------------
2011 F350 SRW CC/SB 4x4 Lariat 6.7 PSD Dark Pearl Metalic

1974 Bob'd Deuce on 16.00-20 XZLs, locked front and rear, hydro steering, front and rear winches, 5.9CTD/nv4500, hydro-boosted disc brakes

Member since Jul 05, Dually Club Member #63, American Club Member #42, FOSP Member #8
mudguppy is offline  
post #9 of 11 (permalink) Old 11-27-2011, 07:05 PM
Junior Member
 
Join Date: Nov 2009
Posts: 3,533
Points: 70,107
Thanks: 69
Thanked 655 Times in 578 Posts
The sticker has to be somewhere, maybe on the valve cover I have an LMM GMC and the MM3 on mine is 108. I do not know what the new LML is but if they hide it they can not be very proud of it.

1988 ford van fresh overhaul, 1991 nissan pick-up 1993 Caprice 2000 GMC S10 Blaser 2007 nbs 3500 GMC 4x4 crew-cab long box 17 inch single wheels Duramax Alison. BW turnover Ball. Furakawa FL35 loader. Retired, HD mechanic, worked on engines all my life. Fabricator welder. electrician. in the process of finishing my new shop. Live in Rock Creek B.C. Wife has a fruit stand.
Johnp3 is offline  
post #10 of 11 (permalink) Old 11-28-2011, 01:45 AM
Tebow-in'...
 
mudguppy's Avatar
 
Join Date: Dec 2008
Location: duncan, SC
Posts: 1,243
Points: 32,344
Thanks: 173
Thanked 142 Times in 105 Posts
yeah, that must be it.

i've searched for about 20 minutes about a year ago when you were last requesting - can't find it. you try finding it on your buddy's truck(s)?

Travis
---------------------------------------------------
2011 F350 SRW CC/SB 4x4 Lariat 6.7 PSD Dark Pearl Metalic

1974 Bob'd Deuce on 16.00-20 XZLs, locked front and rear, hydro steering, front and rear winches, 5.9CTD/nv4500, hydro-boosted disc brakes

Member since Jul 05, Dually Club Member #63, American Club Member #42, FOSP Member #8
mudguppy is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Diesel Truck Forum - TheDieselGarage.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
best year and engine for good fuel mileage cnacowboy 1994-2003 7.3L Power Stroke 8 10-05-2011 12:04 AM
Affect of Water Injection, Engine Coolant Temperatures stevebos 2003-2007 6.0L Power Stroke 7 09-03-2006 10:18 PM
Affect of Water Injection, Engine Coolant Temperatures stevebos 5.9L Cummins (1998.5-2002) 1 09-01-2006 05:19 PM
Affect of Water Injection, Engine Coolant Temperatures stevebos 1994-2003 7.3L Power Stroke 4 09-01-2006 05:13 PM
Affect of Water Injection, Engine Coolant Temperatures stevebos 5.9L Cummins (Pre 1994) 0 08-31-2006 07:37 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome