I'm getting 9 MPG.
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Modular motor junkie
Joined: May 2009
Posts: 6,190
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From: Texas
I'm getting 9 MPG.
I have put 3 tanks through the IDI. They have been 9.0, 9.4 and 9.2 MPG. The V10 being used the same way, at the same speed, on the same roads gets 10+ MPGs on fuel thats $.30 a gallon cheaper! It also makes 100 more HP and 100 more TQ. Whats the deal? I thought these IDIs got much better fuel mileage than gassers.
Senior User
Joined: Nov 2009
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Don't know how it compares but we got 18 mpg on a trip last weekend with our clunker. There with 2 people and tools. On the way back with same and dana 50 front end/springs and rear axle and some misc. parts.
What is real crazy is I believe ours has the original injectors/pumps, etc. just looking over how bad everything looks on this truck and talking with the previous owner who got it off a ranch as a work truck.
A typical load on a trip averaging 50-60mph for us, mostly on flat freeway has shown a consistant 12-13 mpg. That is with a 5,500 pound 24 ft. hitch mounted travel trailer, people inside the cab, tools and 2 sportbikes in the bed.
We have abused axles and just picked up a cheap set with 4.11 gears, some say I am crazy to change but we don't daily drive in it and would gladly exchange some mileage for towing help. Our setup maintains on flat ground just fine as is but the hills kill the poor truck.
What is real crazy is I believe ours has the original injectors/pumps, etc. just looking over how bad everything looks on this truck and talking with the previous owner who got it off a ranch as a work truck.
A typical load on a trip averaging 50-60mph for us, mostly on flat freeway has shown a consistant 12-13 mpg. That is with a 5,500 pound 24 ft. hitch mounted travel trailer, people inside the cab, tools and 2 sportbikes in the bed.
We have abused axles and just picked up a cheap set with 4.11 gears, some say I am crazy to change but we don't daily drive in it and would gladly exchange some mileage for towing help. Our setup maintains on flat ground just fine as is but the hills kill the poor truck.
Posting Guru
Joined: Mar 2010
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From: Upstate NY
I have put 3 tanks through the IDI. They have been 9.0, 9.4 and 9.2 MPG. The V10 being used the same way, at the same speed, on the same roads gets 10+ MPGs on fuel thats $.30 a gallon cheaper! It also makes 100 more HP and 100 more TQ. Whats the deal? I thought these IDIs got much better fuel mileage than gassers.edit: for example my truck setup I have learned it is normal to recieve about 14mpg I am in the process of thinking how to switch out the 4:10 to 3:55
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Modular motor junkie
Joined: May 2009
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From: Texas
SRW flat bed that weighs 8,000 empty. Some empty city and highway, a little idling, and some hualing in light hills.
Posting Guru
Joined: Mar 2010
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From: Upstate NY
hmm sounds like you have a nice setup, I envy you guys with the zf5, but anyways how about your Injection pump timing? when you installed it did you have it timed properly? honestly I just did my timing on the truck recently and it increased my mpg about 2mpg, my trucks timing was retarded to much so I advanced it, also you havent tinkered with the fuel screw on the IP correct? because I have learned that aswell eats mpg
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From: concord ca
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Joined: Jul 2008
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From: Camano Island
Time the v-10 by ear and then compare the two
. Not sure how you could be sure the timing is "pretty close" if its set by ear,I think what Joe f350 said is the obvious first step in figuring it out after the injector and pump install.
nate
. Not sure how you could be sure the timing is "pretty close" if its set by ear,I think what Joe f350 said is the obvious first step in figuring it out after the injector and pump install.nate
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Modular motor junkie
Joined: May 2009
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From: Texas
It sounds like it should, but I get your point. Thing is its a 3 hour drive one way, plus the $100 to have it done. Thats a whole day and close to $200 with fuel to have that done.
Lead Driver
Joined: Dec 2006
Posts: 6,496
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From: So. Jersey
For that cost alone is enough reason to shop around for the diesel timing adapter and time it yourself. Then you could help out with timing anyone else in your area and make a dolllar back.
Fleet Owner
Joined: Jul 2006
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From: Mi'kma'ki
ouch.that would make me cry.
how many miles on this rebuilt engine now Bill?
is it this rig here:
https://www.ford-trucks.com/forums/p...ictureid=19731
is that a f250 or 350?
is it 2 or 4wd?
did you inspect the front wheel bearings,and insure all 4 wheels spin freely when you jack them off the ground?
when's the last time the trans/transfer/rear oil was changed?
timing an engine by ear is good enough to drive it to the shop and thats it imho.
fuel costs to much to play horse shoes and grenade games with engine tuning theses days.
how many miles on this rebuilt engine now Bill?
is it this rig here:
https://www.ford-trucks.com/forums/p...ictureid=19731
is that a f250 or 350?
is it 2 or 4wd?
did you inspect the front wheel bearings,and insure all 4 wheels spin freely when you jack them off the ground?
when's the last time the trans/transfer/rear oil was changed?
timing an engine by ear is good enough to drive it to the shop and thats it imho.
fuel costs to much to play horse shoes and grenade games with engine tuning theses days.
Lead Driver
Joined: Dec 2006
Posts: 6,496
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From: So. Jersey
He posted 900 miles. A far cry from broken in and way to early to even consider fuel milages on any engine IMO.