Hey guys I'm back! Crazy year, didn't have much money here lately but started a new job and I'm back! Anyways, I received the Quadzilla for my 01 a year ago for my birthday and I was super excited because for once I'll have custom tunes and I will be able to get out of the <15mpg that I had been getting with my Smarty S03.... Boy was I wrong..... Year later, mileage still sucks. NEVER got above 15mpg, no matter if I ran a tune of my own, or one of Mike's, Me's, nor Drips tunes. I'm at a loss from where to go from here. With my S03 I got 18mpg ONE TIME so I know its possible, but  I've never been able to break that mid 15mpg mark. All I have done motor wise is 100hp DAP VCO injectors with an Airdog 150, and the axles are 3.53s. Recently the TPPS started going out but I doubt that's entirely the issue. Truck doesn't really smoke at all, but depending on what tune I run it'll obviously effect smoke, just mileage ain't going anywhere.

 

History behind the motor as its not stock to my truck: Threw it in 2 years ago after my 53 block had cracked, motor sat for about 6 years. 4 months after getting it reinstalled in my truck I threw new injectors, tubes, and orings into it and thats the only thing thats been done to it within its 234k mile existence and it did bump up the mileage from 12 to 16 pretty regularly. Previously it was in an old mans truck before it totaled a deer out and subsequently the truck, so all the sensors had been sitting dormant for awhile.

 

My question is am I doing something wrong? I've tried to read the datalogs but nothing is out of the ordinary and honestly I don't really know what I'm looking for, so I'll include a 65mph datalog that I took today, kinda a last second deal but I have other logs I can throw in if need be, this is just the latest and the only log I have of the tune I'm running.

 

If someone can help me I'd be in your debt forever, I'm sick of terrible mileage, especially driving 70 miles a day. I'd really appreciate any help I can get, Happy New Years!

 

EDIT: I'm going to throw this consideration in, but should I swap PCM and ECM? I got the set when I got the new motor and just respectively threw them on there with their motor, cause at the time I didn't know better. Seemed that the old PCM and ECM combo got better mileage, probably not though, still food for thought.....

iQuad-2019-12-26-05.49.267182238428847019659.csv

Edited December 27, 20195 yr by TheGreatWhite

This isn't tune related.  Load is too high to get good mileage, assuming it wasn't windy and it was realitively flat.

1 minute ago, Me78569 said:

This isn't tune related.  Load is too high to get good mileage, assuming it wasn't windy and it was realitively flat.

Well I live in the Flint Hills so it's semi flat, but when it's not the hills are quite the pull, but in that log yes it was relatively flat with one semi good hill.

Some flatbeds are very heavy. Don’t know about yours. 

3 minutes ago, Royal Squire said:

Some flatbeds are very heavy. Don’t know about yours. 

Its not even for a Dodge funny enough, but I don't see how all that steel could be lighter than sheet metal. The underside is made of I beam, C channel, and square tubing. I have a bed for the truck, just need to cut this one off the frame sadly :(.

Here's a better picture on how far out the flatbed sticks out.

How heavy is the truck?

23 minutes ago, dripley said:

How heavy is the truck?

7800-8000lbs I believe

3 hours ago, dripley said:

How heavy is the truck?

Actually closer to 9k, found some receipts.

2 minutes ago, TheGreatWhite said:

Actually closer to 9k, found some receipts.

I was wondering. It is not odd for me to ride around at 7500 to 8000 at times.

1 minute ago, dripley said:

I was wondering. It is not odd for me to ride around at 7500 to 8000 at times.

Yeah cause I asked my brother and he said we were 11k with a pretty heavy trailer and a ton on said trailer.

Edited December 28, 20195 yr by TheGreatWhite

Flat bed dually's take power and fuel just to roll. My Ford only gets 16 mpg and it is a VE pumped 12 valve, way less power than yours. The flat bed is 8' wide, air horns, full size west coast mirrors, two transmissions and stacks all take a toll.

 

 

Funny thing I just scaled my truck. Front was 4,400 pounds, the rear was 2,900 pounds, for a total of 7,300 pounds currently. Here is current fuel logs with winterized fuel and outside temps between 0*F and 25*F most days. Remember I went down in tire size to increase the rear ratio. Going from 265's to 245's change the final ratio to 3.69:1 which is super quick and extremely low in engine load at 22-25% at 80 MPH. My 65 MPH is rough 15-17% engine load. 

 

 

Edited December 28, 20195 yr by Mopar1973Man

3 hours ago, NIsaacs said:

Flat bed dually's take power and fuel just to roll. My Ford only gets 16 mpg and it is a VE pumped 12 valve, way less power than yours. The flat bed is 8' wide, air horns, full size west coast mirrors, two transmissions and stacks all take a toll.

 

 

Man that is a beautiful truck! I've been looking for old Ford's in that body style or a 60-70s Power Wagon to put a Cummins in.

 

2 hours ago, Mopar1973Man said:

Funny thing I just scaled my truck. Front was 4,400 pounds, the rear was 2,900 pounds, for a total of 7,300 pounds currently. Here is current fuel logs with winterized fuel and outside temps between 0*F and 25*F most days. Remember I went down in tire size to increase the rear ratio. Going from 265's to 245's change the final ratio to 3.69:1 which is super quick and extremely low in engine load at 22-25% at 80 MPH. My 65 MPH is rough 15-17% engine load. 

 

 

I'm starting to concede to the whole smaller tire idea more and more but I don't get it, why do people keep saying to go with a bigger tire to drop the rear end down to get better mileage? My dad had a 95 that started out with 4.11s and fuel sucked, so he swapped them for 3.53s and from then on got 22mpg consistently on the same exact tires I run, 235/85/16, and even one time went to 285s and still got great mileage. 

That green marker was 120 mile round trip to Boise running the interstate at 82 MPH @ 2500 RPMs. Just short at 19.92 MPG.

 

Remember for every 1 pound of rotational mass you can remove is like 8 pounds off the frame weight.

 

Oh 405k miles on the clock. Injectors are good still with 7 to 12% idle engine load. That 320 bar pop pressure really helps.

Edited December 28, 20195 yr by Mopar1973Man

10 minutes ago, Mopar1973Man said:

That green marker was 120 mile round trip to Boise running the interstate at 82 MPH @ 2500 RPMs. Just short at 19.92 MPG.

 

Remember for every 1 pound of rotational mass you can remove is like 8 pounds off the frame weight.

 

Oh 405k miles on the clock. Injectors are good still with 7 to 12% idle engine load. That 320 bar pop pressure really helps.

Is that 7-12% at idle? At idle I'm 5-7%.

 

My injectors are just 7.009 DAP Bosch VCOs, do you know off hand what their pop pressure is?

1 minute ago, TheGreatWhite said:

Is that 7-12% at idle? At idle I'm 5-7%.

 

My injectors are just 7.009 DAP Bosch VCOs, do you know off hand what their pop pressure is?

Start out typically at 305 or 300 bar. Bottom limit is 293 bar. By 260 bar engine load typically bottoms out 0 engine load.

 

Hence why I started at 320 bar for economy and longevity reasons. Upper limit from the Dodge FSM is 327 bar.

4 minutes ago, Mopar1973Man said:

Start out typically at 305 or 300 bar. Bottom limit is 293 bar. By 260 bar engine load typically bottoms out 0 engine load.

 

Hence why I started at 320 bar for economy and longevity reasons. Upper limit from the Dodge FSM is 327 bar.

So to up the bar is that sending them back to DAP or can I take them to my nearest certified Bosch pump and injector shop? I have a good buddy who works there that can hook me up on some injector work.

I would opt for 315 bar for those 7 x 0.009 injectors. Any shop can do pop testing.

12 minutes ago, Mopar1973Man said:

I would opt for 315 bar for those 7 x 0.009 injectors. Any shop can do pop testing.

So here's a question and an idea, would a turbo do anything with lowering the load? I have a Smeding 62/65/14 I've been thinking about throwing on the ole girl, either that or I have a stock he351cw. Would either or help with engine load and mileage?

Engine load is based on timing and drag. Turbo has nothing to do per se in engine load. My typical boost is only 2 to 4 PSI at 65 MPH. Timing is related to cetane of your fuel. Next one is drag lifts, leveling, oversized tires, etc will increase drag.

Edited December 28, 20195 yr by Mopar1973Man