I would like to tweek my truck for better fuel economy

[bikeboy1713]

I use my truck mostly as a play truck. I am currently getting 17.75 MPG empty and 13 towing my 20' camper. (when I am easy on the skinny stick). I have my pump set with the fuel pin at the deepest setting, and star wheel all the way out . I removed the collar from the fuel screw and turned it all the way in till it it stopped turning. After doing this the fuel mileage didn't change but the power went waaay up. The truck will smoke before the turbo spools then clear up right away. If I really mat it I can lay quite a cloud of black smoke, although I am careful not to do this for too long as I don't want the EGTs to get too high.

Here are the questions

Would installing 185 or 190 injectors help my fuel mileage (6 holes instead of 4) without hurting my power.

How much gain do you think that I will get with a Hughs torque converter

I still haven't advanced the timing. How much does that help.

If anyone has any other good ideas for fuel economy please let me know.
I don't want to spend tons of money on the truck but if I spend the money and get results most of it should come back as fuel savings.
Don

[CumminsPride]

I think the best iprovment you could make would be a 5spd conversion. Better than spending the dough on converter and injectors. You should be able to find a decent donor for 1500 or less.

[fourwheelininajeep]

Timing plays a huge part I bumped mine all the way to the head advanced and it improved hugely for power and throttle response. I was getting 19 with a 5 speed and a stock pump, I turned my fuel screw in 2 turns and put a set of same as stock size holes but different spray and advanced timing im getting 23 on a non intercooled. Super high egts if a punch it but I keep it out of the throttle mose of the time