MikeyB

Did a 700 mile round trip towing yesterday and was disappointed in the fuel economy going out there. With the REVO set to level 5, TM2, Timing4 and RP2 the fuel economy going out there was only 14.2mpg towing the Kawasaki Mule (guessing around 3500-4000 lbs or so including the trailer). Traveling the posted speeds (65-70mph).
On the way back I set the RP back to 1 and on the same route got 15.2mpg. This about the same economy I got back on the 3.12 (4.11) level 5 TM mild towing the same equipment.

So my findings show that adding rail pressure may hurt the fuel economy rather than help it, at least for me. I had the same experience running pressure before using the Edge EZ.

Wonder if the TNT level 1 would do better.....

MikeyB

pupeperson

I've not tried towing with the TNT yet, but think it would work ok because of the timing retard available with it. Doubt the fuel mileage would be great, but higher power levels traditionally require less timing to keep things together over time. EGT's could become a problem though.... If anyone has tried towing with TNT, I and I'm sure many others would like to hear your experiences.

omaharam

In my opinion, you'd really have to tow the same direction with the setting change to know if it made a difference. There on one setting and back on another is not a fair comparison.

MikeyB

I agree. But I have taken the same route before and the fuel economy is very close both ways (about 15.5 mpg). The only variable is the fuel, and both tanks had 16oz Power Service and 16oz TCW3. Winds where calm.

So I'm basing this theory on previous data.

MikeyB

LFD2037

Doesn't using PS & 2 stroke in the same tank kinda equal itself out to nothing? The 2 stroke gives lubrication & the PS does boost cetane but it also dehydrates everything. I have seen better fuel mileage w/both but not in the same tank. Am I wrong in thinking this?

MikeyB

PS does have some lubricating properties, but not near like TCW3. I usually run PS ever other tank just to keep the injector tips clean, but for this trip I added it for both fillups to keep the variables to a minimum.

MikeyB

jlibert

you should be thankful, the new ford powerstroke's don't even get that kind of mileage empty

elirandolph

Hey Mikey was your overhead reading real high on the trip? Just curious how far the overhead is off with smarty and pressure.

MikeyB

I didn't checked the overhead Guess-O-Meter for this trip.

MikeyB

ddestruel

I saw similar results with REVO and rail pressure. i lost about .75-1 mpg towing across the board when i added mild rail pressure towing.

currently im back running my old 4.11 2.11 b program for now. even though its supposed to be similar in settings to the REVO on SW#7 as what 4.11 was on SW#7 mild torque, the REVO smokes a fair amount more. so until i get to do more playing around im back witht he old stuff

zack birge

I towed my bass boat this weekend that should weigh around 3k to 4k on the trailer and my overhead showed 17.1 to 17.8 the whole time. I left my house with just below a half a tank and when I got back from the 130 mile trip there and back i had right at a 8th of a tank left. Good or Bad??? And my egt's never went over 1200.

MikeyB

Glad I'm not the only one seeing the lower fuel economy when adding pressure.

Zack, the only true way to tell is by hand calculation for the mileage, but that requires starting with a full tank and then refilling.

MikeyB

zack birge

Right and i realize the overhead is WAY wrong because i hand calculated only 16.5 mpg just daily driving! I will get true hand calculation towing when i go to lake erie the first two weeks of june with my boat. Im guessing its going to only be around 11 or 12

rammv

Same with me. loaded revo put it at tm 2,rp 2,timing 4, wastegate 1, lost about .5 to .75 mpg.

pupeperson

rammv: That would make sense, as that timing is way retarded and designed to be used with Nitrous according to the info I downloaded from the TDR msg posted by Bob Wagner.