First truly heavy haul

[DIESELMAN]

Phoenix(Mesa) to Flagstaff (170 miles, 6000' increase in elevation), 106 degrees outside, 19400 GCW 65 MPH average, 75 once I topped 'the rim' at 7000 feet, EZ only on 1. Finished the trip at a hair over 10mpg, had to back off on a couple of hills to 55 due to EGT getting a bit high.



Interesting note, the EZ messes the MPG up by about 9%, the tires decrease the indicated speed and miles by about 9%, therefore the EZ effect on the guage is a wash, indicated MPG is actual on my truck, just the speedo was wrong.



98 Gallon Transfer flow goes in this week.

 

[moparguy]

Dieselman, sounds like it should be about broken in by now. That was a good workout.



The family and I spent the night in Flagstaff on the way to the North Rim of the "Big Ditch" not long ago, we all fell in love with your part of the world. I checked a local real estate rag and property values were depressingly high. Must be all those foreigners .



Good luck with the new ride.



Ronnie

 

[MMeier]

DM, I take it you mean the EZ makes the overhead read 9 % more than it did previously?!

 

[DIESELMAN]

MMeier -



Yes, the tires are about 8. 1% greater in circumference, therefore the mileage reads 8. 1% less, as does the speed, and when I calculate that mileage compared to the pen and paper pump mileage, the EZ effect is less than 1% difference from actual.



The EZ basically has the effect of delivering more fuel at a given throttle setting than the ECU believes is being used, and therefore the computer reports a lower fuel consumption than is really occuring.



Also, given 3 150+ mile trips I've made at EZ1 / EZ3 and EZ4 settings, I think the increase in fueling is the same for all settings except that the additional fueling comes into play at lower and lower boost levels. The Position 1 changes little unless boost averages above about 15 lbs, 3 appears to be about 10 or less, and 4 is no boost required or very little boost, maybe 1-3lbs. All SOP augmented with cruise control and a calculator of course.



I'm leaving mine on 3. Position 1 with the truck empty and the pedal light and mellow does nothing for the truck or to the mileage at all that I see.

 

[Mopar_Mudder]

I also just did my first heavy haul last week, figure I was real close to 32,000# gcvw. was about a 100 mile trip, but no mountains here in WI like you had to deal with. Don't have an EGT gauge yet so I didn't push it real hard but it had no problem rolling down the road at 65. 2 hills slowed me down to 55 but I never put all the power to it because of no guage.



Do you have a different exhaust or anything to help with EGT's ?



This week end I have another heavy coming up around 29,000#. Suppose to have my X-Monitor by then and a Scotty Ram Air III also. Then I will beable to really get after it and see what happens.

 

[BillGotthelf]

My first heavy pull-I had 2200 miles on OD and towed a 14,000lb fiver from Orlando to West Palm Beach. Set cruise control at 65 and averaged 10. 2 mpg. I hope to see 11+ after truck is broken in and synthetic added all around.