How can I tune my truck to ge the best MPG
#1
How can I tune my truck to ge the best MPG
I have probly about 350,000 miles or more (odometer doesnt always work) but she still runs excellent. Im getting about 17 mpg average with some smoke in the power band. It has 4.10 gears with 5speed and 31 inch tires 235/75r17 I think. HX35 turbo silencer MIA with stock intake going to the stock airbox but it has a k&n cone filter with a pvc adapter that I made and the box is closed. exhaust is a 3inch down pipe to 4inch to 6 inch stack. Pump mods 3200 gov spring, stock fuel pin, idle cranked up for winter 800 rpm id say, starwheel turned a bit, full throtle screw backed out, power screw untouched I beleive. What should I change to get the best posible tune for best MPG I think my big limiter will be my gears but I dont have money too change them so we will have to work with what I have. I would like to aim for 20 mpg or better
#2
If it's a dually 17mpg is about what you will get. An auto will get worse mileage than a stick. Stock sticks at that many miles will be dirty and worn causing less mileage. My auto trans dually with stock sticks, and 297,000 has gotten 17mpg since about 1996. I've read that's about what other similar trucks get to. A manual srw with good injectors should get 20+ with a reasonable driver.
#3
#4
I have probly about 350,000 miles or more (odometer doesnt always work) but she still runs excellent. Im getting about 17 mpg average with some smoke in the power band. It has 4.10 gears with 5speed and 31 inch tires 235/75r17 I think. HX35 turbo silencer MIA with stock intake going to the stock airbox but it has a k&n cone filter with a pvc adapter that I made and the box is closed. exhaust is a 3inch down pipe to 4inch to 6 inch stack. Pump mods 3200 gov spring, stock fuel pin, idle cranked up for winter 800 rpm id say, starwheel turned a bit, full throtle screw backed out, power screw untouched I beleive. What should I change to get the best posible tune for best MPG I think my big limiter will be my gears but I dont have money too change them so we will have to work with what I have. I would like to aim for 20 mpg or better
#5
I hate autos so I have a 5 speed. My brother had a couple g56 6 speeds a while back so that could have been a option but the clutch was over a grand at southbend. Im pretty sure if I fidle with the pump a bit more and try to get rid of the smoke and bump the timing 1/4 inch it will improve.also bio diesel may be a short term option since my my mom has a mercedes with VO system and she has 200 gallons of VO but a BIo diesel system takes alot of space and is fairly expensive as well. Would a BHAF do better then a k&N? I also have a 2nd gen intake horn just laying around will that do anything? will my intercooler hose work? What about synthetic lubercants? Im pretty sure I can do better than 17mpg with the ammount of smoke I get. I wonder what it would take to make my own water meth injection system
#6
I hate autos so I have a 5 speed. My brother had a couple g56 6 speeds a while back so that could have been a option but the clutch was over a grand at southbend. Im pretty sure if I fidle with the pump a bit more and try to get rid of the smoke and bump the timing 1/4 inch it will improve.also bio diesel may be a short term option since my my mom has a mercedes with VO system and she has 200 gallons of VO but a BIo diesel system takes alot of space and is fairly expensive as well. Would a BHAF do better then a k&N? I also have a 2nd gen intake horn just laying around will that do anything? will my intercooler hose work? What about synthetic lubercants? Im pretty sure I can do better than 17mpg with the ammount of smoke I get. I wonder what it would take to make my own water meth injection system
#7
Well we can talk about transmissions all day long but some basic things you can do are:
tighten the star wheel in the AFC. This will cut back on wasted pre boost fuel without affecting over all power. Basically your foot and your MPG will be more in line with each other.
You can back off your power screw. If you get anything darker than black smoke at full throttle this needs to be done. If not, being conservative with your foot would be enough.
Advance your timing (if you haven't already)
Keep a clean air filter and fuel filter on the beast.
These few things can make a huge difference
tighten the star wheel in the AFC. This will cut back on wasted pre boost fuel without affecting over all power. Basically your foot and your MPG will be more in line with each other.
You can back off your power screw. If you get anything darker than black smoke at full throttle this needs to be done. If not, being conservative with your foot would be enough.
Advance your timing (if you haven't already)
Keep a clean air filter and fuel filter on the beast.
These few things can make a huge difference
Last edited by db Zac; 01-22-2013 at 06:27 PM.
#10
In your opinion would a bhaf do better then my intake setup
---AutoMerged DoublePost---
what do you think the best way to figure out your MPG. With out runnig a full tank of fuel. since it takes 8 to 10 days to get through a tank for me
---AutoMerged DoublePost---
what do you think the best way to figure out your MPG. With out runnig a full tank of fuel. since it takes 8 to 10 days to get through a tank for me
Last edited by 1993firstgennewbie; 01-23-2013 at 11:33 AM. Reason: Automerged Doublepost