Originally Posted by travin69
Hello all. I am new here but not to reviewing the forum. Been planning a build for some time (last 9 months). Now that I am back from my deployment, it is time. My build is designed with one thought in mind: Miles Per Gallon. My initial goal is 30 MPG HWY at 60-70mph and 25 MPG CITY. I know, this is quite a feat and maybe not even doable, but I am going for it. My second goal is of asthetics, both inside and out.
Method of MGP Calculation: I have a Scan guage that will measure the CAN bus. After every upgrade, I will drive the same route (about 30-40 miles) and use the results for posting here. The city MPG will be a weeks worth of driving to work (I hit a lot of city traffic), again, using the scan guage as my method of MPG calculation.
I have a stock 2005 F150 5.4L 3V 4x4 Crewcab. Here are some photos:
Hi & Welcome!
You'll need to consider (a quick l'il list in no particular order):
-improving aeros (that means no lift/level, but rather lowering )
-decreasing rolling resistance
-decreasing driveline losses (e.g swap in a manual trans for the auto, ditching all the 4x4 apparatus, including the transfer case)
-decreasing static mass and rotational inertia of the running gear
-increasing volumetric efficiency
-increasing cylinder scavenging and exhaust flow velocity
-maximizing part-throttle torque
-minimizing / reducing parasitic losses (e.g efans instead of mech fan, electrical system loads, A/C usage, LED lighting, lol)
-mileage-specific trans shifting strategies (see custom tuning)
-torque converter lock/unlock strategies (see custom tuning)
-using highest octane fuel available (see custom tuning)
maintenance ( e.g fresh front O2's, fresh plugs, alignment, etc)
-thinner / synthetic fluids
-whether or not you will be invoking hyper-miling techniques or not
What' s going to be one of yer largest concerns is velocity - drag increases with the square of velocity:
FAir = A/2 × Cd × D × v2
A being the frontal area of the truck in m2,
Cd being the drag coefficient,
D being the density of air (1.29 kg/m3) and
v being the velocity in m/sec.
In other words - the truck weighs almost 3 tons, is shaped like a brick, has a ~80+ horsepower driveline loss (thank the shitty 4R75E in part for that), and you'll need to be going a lot slower than yer target velocity to even begin to approach yer stated goals. There is not going to be much you will be able to do to this truck to appreciably
reduce drag (1-2 mpg at best, less as velocity increases), regardless of any other improvements you make. So - speed is going to be yer single largest fixed problem.
And all of this is going to take real money - so don't be surprised if the cost/benefit equation is suboptimal, other than to serve as a science project and/or hobby.
Oh yeah - and I do hope you'll avoid wasting yer time & money on those idiotic HHO generator scams. There's a feller whut posted very recently suggesting his l'il home-brew mason jar lashup bumped his 3-ton Yukon's mileage up by 7 mpg's. LMFAO !!! The **** people delude themselves into believing. Even when, clearly, the math confirms it's impossible. I reckon Glue-sniffing is back with a vengeance - or the feller is living the wacky-tabacky high life. And failed miserably at cipherin' in school
- 2005 5.4L 3V's such as yours are in a high-risk demographic for injector failures - a toasted cat, bent rod or hydrolocked engine will quickly ruin yer project - remedy ASAP, regardless whether you are covered or not (mileage limit): http://ww2.justanswer.com/uploads/sd...229_r07m08.pdf
Looking forward to yer progress!