Highway MPG

[Gregturley]

Took the mighty Dodge on its first road trip today. Over 249 miles, in rain with lots of 65-45 braking for the first 90 miles i got 16.57 mpg. After the rain cleared we got free of traffic and had cruise set at 70-75 most times. Tried to data log but couldn't, I'll have that fixed for the return trip. I will get some data and hope some people here can help me with a tune. 

[Mopar1973Man]

How many miles on the clock?

 

Stock injectors?

[Gregturley]

180xxx rv275. Everything is in my sig

[Me78569]

mileage seems on par with conditions.  It doesn't take much braking and accelerating to eat up fuel.  

[Mopar1973Man]

How many miles on the RV275s?

[Evan]

I agree16-17 isnt bad.

Specially for stock turbo and smallish injectors with some mies.

 

Tune it so it puts some smoke out the tail pipe and see what happens for the mpg numbers

[Gregturley]

@Mopar1973Man 5000 ish. Ill get a data log on the run home. Its the best ive gotten yet.

[Gregturley]

Wasn't able to get a data log. Couldn't send it from my tablet and forgot what i did to connect my phone. 343 miles, mostly interstate with 1 20 minute trip up a mountain road and back plus 1 trip to work and halfway home. Got 17.718 mpg running 70-75. Guess its not doing as bad as i thought it was. Running around Pigeon Forge i got better mpg than here at home. Didn't expect that.

[Youngblood24v]

17 seems about average for people, meanwhile I still get roughly 13.5mpg with this cold weather no matter if it’s highway or city driving and 15mpg during the warmer months 

[Mopar1973Man]

10 hours ago, Youngblood24v said:

17 seems about average for people, meanwhile I still get roughly 13.5mpg with this cold weather no matter if it’s highway or city driving and 15mpg during the warmer months 

 

Nitto tires have a high rolling resistance. Ratio is good with the 305/50 R20 your running just the tires with aggressive tread tends to have more drag than smoother faced tire. Then your VP44 is most likely low quality most T-bred pumps. 0.078 lines are going to make your timing retarded most likely. What's your current timing on the Quad? 

[Scarecrow]

Running 305/50r20's with a dually would definitely kill your mileage.

 

Mark

[Youngblood24v]

5 hours ago, Mopar1973Man said:

 

Nitto tires have a high rolling resistance. Ratio is good with the 305/50 R20 your running just the tires with aggressive tread tends to have more drag than smoother faced tire. Then your VP44 is most likely low quality most T-bred pumps. 0.078 lines are going to make your timing retarded most likely. What's your current timing on the Quad? 

My whole truck is the definition of drag. It’s like sail in the wind. I’d have to check to see what my timing is exactly. It’s pretty conservative. I don’t believe the lines play a factor as when I replaced my tappet cover I replaced my lines because they were really rusted and the scheid stainless lines were around $100 cheaper than stock size lines and I knew the difference between the stock and .078 wasn’t going to make it loose or anything so I went with the .078 lines. When I did this I had no change in fuel mileage or drivability at all. 

2 hours ago, Scarecrow said:

Running 305/50r20's with a dually would definitely kill your mileage.

 

Mark

I get the same mileage currently as I did with my stock rims/tires. I believe they were 235/85r16 stock size tires 

Edited February 18, 2020 by Youngblood24v

[Mopar1973Man]

1 hour ago, Youngblood24v said:

It’s like sail in the wind.

Wow. Still?

 

1 hour ago, Youngblood24v said:

I’d have to check to see what my timing is exactly.

Here is what I've got currently.

[Youngblood24v]

1500: 15

2000: 18

2500: 23

3000: 25

Max: 26