Do bigger injectors effect DIC?

[Porno Joe]

Would my 40% injectors effect the info on my DIC, such as gallons used?

My last tank- 270 miles, I reset my gallons used and watched it. According to how many gallons I used, the truck got 20 mpg. But according to filling up at the pump, I only got 15 mpg. Seems like a big difference to me

 

[Porno Joe]

I'm trying to figure out if yes it's possible they can off that far, or no I have to start looking where all this diesel is going

 

[2005LLY]

I am wondering the same cause I get shit mileage now that I have bigger sticks

 

[Hot COCOAL]

you guys have the appropriate tuning for the larger injector? are your tires the same size as your computer thiks that they are?

alot of guys claim they can get slightly better economy if they try, this is the first question i have seen regarding how sticks affect the DIC? but i imagine as long as you have a good/complete tune the DIC should calculate by the ammount the injectors are spraying, not what they used to spray per injection pulse???

 

[DAVe3283]

Yes, big injectors will throw off the dash mileage display. On LB7s you could correct it in the tune, but on the newer trucks, it will just be wrong.

However, just having large injectors shouldn't necessarily hurt your mileage. I went from stock to 60% over, and my mileage did not change at all, or maybe went up a hair on average. It is all in the tuning. If you don't have tuning for the larger injectors, it won't run as well as it could (including mileage).

 

[paint94979]

Don't trust your DIC for accurate mpg... Hand calculate. Yes 60% over and bigger injectors in my experience tend to get poorer fuel economy.

 

[Porno Joe]

Mine are 40 overs.

Tuning is correct and adjusted for tire size.

My gallons used said I only used 12 but my truck 18 to fill up at the pump.
Truck only got 15 mpg outta the last tank. Which was 250 miles of highway. Seems too low to me?

 

[Hot COCOAL]

well how many cars and trucks did you pull on during that tank of fuel
it may be an issue in your right foot, or left brain, however you want to look at it

 

[Hot COCOAL]

whos injectors did you use??? and who tuned it, was it a custom dyno tune, or a canned tune?

 

[Porno Joe]

Injectors were brand new exergy tips I swapped on my stock injectors. Caleb tuned the truck in the drivers seat so I know it's right. I do have a spare set of injectors I may send out to have tested and then swap those in

And I made sure to set cruise between 65-70 the whole trip. No hot rodding.

 

[blk smoke lb7]

Might as well ignore the dic as far as mpg.When i had my edge and after a trip to Michigan it said i was getting 38 mpg but hand calc said 18.Dont know what is says anymore as i dont pay any attention to it anymore.

 

[Polaris7x]

you could always sell me those tips

 

[S Phinney]

All the DIC pulls numbers from tables not actual measurements. The closet that I have ever seen is the DIC being 105 mpg better than you actually got.

 

[05_LLY]

Injectors were brand new exergy tips I swapped on my stock injectors. Caleb tuned the truck in the drivers seat so I know it's right. I do have a spare set of injectors I may send out to have tested and then swap those in

And I made sure to set cruise between 65-70 the whole trip. No hot rodding.

I would look at the injectors, they are rather high miles for just adding tips, balance rates dont always tell the whole story like a test bench will!

 

[duratothemax]

On LB7s you could correct it in the tune, but on the newer trucks, it will just be wrong

you can fix it on 04-05 LLY's in the tune as well. B0781.

 

[DuramaxPowered]

I use tuning from Tony at Ridge Runner. The DIC and hand calculated mileage are ALWAYS with .3 MPG. I hand check it EVERY single time that I fill up.:thumb:

 

[sweetdiesel]

Yes, big injectors will throw off the dash mileage display. On LB7s you could correct it in the tune, but on the newer trucks, it will just be wrong.

However, just having large injectors shouldn't necessarily hurt your mileage. I went from stock to 60% over, and my mileage did not change at all, or maybe went up a hair on average. It is all in the tuning. If you don't have tuning for the larger injectors, it won't run as well as it could (including mileage).

How do you do that Dave?

you can fix it on 04-05 LLY's in the tune as well. B0781.

That would take a ton of time! And if you had any type of large PW tune it will not work

 

[Harbin_22]

Not that I care at all, but with Rob's tuning my DIC is within .5 or less. With Kory's it is 2+ mpg on the low side. So Kory's tuning it will say 17mpg in the DIC, but hand calculated will be 19.2. Guess it is pulse at cruise speed or something to that nature.

 

[duratothemax]

That would take a ton of time! And if you had any type of large PW tune it will not work

ive never messed around with it because I never cared enough to put time/effort into adjusting it.

I was simply stating that yes, it can be adjusted on 04-05 LLY's. (dave originally said you can only adjust it on LB7's, I was just correcting him in saying that you can adjust it on LB7 AND LLY)

 

[sweetdiesel]

ive never messed around with it because I never cared enough to put time/effort into adjusting it.

I was simply stating that yes, it can be adjusted on 04-05 LLY's. (dave originally said you can only adjust it on LB7's, I was just correcting him in saying that you can adjust it on LB7 AND LLY)

I understand Ben, However it does not allow enough adjustment for any BIG fuel tuned Pretty much anything over 2600PW it wont work.


Citis Calculator is posted on the site under timing calc.