5.9L 12V PerformanceDiscussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps Related to Performance and Longevity
If you guys have seen some of my other posts, when my truck was bone stock, had a 3 year old fuel filter and gunked up air filter, stock exhaust, stock fp etc.. I was getting 19.33mpg highway going 80-85mph. NOW, with my bhaf, straight ... JOIN NOW TO REMOVE TRACER
If you guys have seen some of my other posts, when my truck was bone stock, had a 3 year old fuel filter and gunked up air filter, stock exhaust, stock fp etc.. I was getting 19.33mpg highway going 80-85mph. NOW, with my bhaf, straight pipe, fuel plate, afc 3/4 forward, and fp 3/4 forward, I am getting SIXTEEN MILES PER GALLON going a VERY consistant 68-71mph!!! My buddy that helped with the fuelplate tuned the afc and starwheel; did he do something that gave it terrible mileage? I mean, this thing is FAST; w/ 1k lbs of sand bags in the rear I can get the dually sideways in 3rd gear on accident sometimes, yet when I baby it to gain max mileage I get 16mpg?? I'm pissed. I cannot put into words how pissed i am getting 16mpg highway, going only 68-71mph. Thats insane. Most people get that mileage when TOWING on the highway.
So my question is, can the afc be tuned for power AND efficiency?
EDIT: For everybodies info, before this trip I swapped my busted turbo for a 2001 hx35 w/ boost elbow gated to 33psi, silencer delete, etc. I capped off the afc line with a screw and clamped it. Could anything in between there have caused poor mileage?
So will I gain or lose a lot of power going afc all the way back? What kind of mileage will I pick up? Should I move my fuelplate all the way forward when moving the afc back?
Where can I buy that spring from? Links?
How do I mod the barrel for full travel?
So you are saying my truck will perform better power AND mileage wise, with the afc all the way to the rear w/ a stiffer spring and properly adjusted barrel?
I don't know how much you will pick up but it will help. If you have the old gov springs from your gov spring swap just use it, works very well.
grind .090 off the barrel and swap the washers.
And yes that is what I am saying. you will have less bottom end smoke with the same fueling up top. I lost 60 rwhp on the dyno when I had my afc set to loose, I " Put out the fire" as its called on the low end.
Ok good deal man. I dont have the gov springs yet though so where can i pick a better afc spring up from? You mean swap the washers w/ regular Lowes washers right? I remember reading about that.
What do you mean your afc set "too loose"? Too far forward?
I'll gain mileage by doing this for certain though?
My buddy who's a beast at 12v's messed w/ the starwheel; not quite sure what he did with it. Are you saying move it all the way forward (towards the cab)? Will I loose power moving the afc back right now?
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