Livernois Motorsports

The website is currently under construction so my apologies for the inconvenience.
Here is our F150 2.7 stock here on the dyno vs our latest 93 octane performance tune.

Peak gains on 93 octane were of 73 WHP and 48 W TQ
Max gains down low show a tire shredding 146 wheel Torque and 80 Wheel HP @ 2800rpm.

lithe

^^^Wow, impressive! Thanks for the info!

In addition to off-the-shelf tunes, does Livernois offer custom dyno tunes?

I realize in the end a customer might end up with pretty much the exact same tune, but part of me just feels safer knowing a tune was optimized for my particular vehicle.

canoepaddler

Fuel does evaporate, but where does it go in a closed system? Gas tanks are only allowed to pull air in. It's called the EVAP system.

Manuellabour247

The fuel tank is not completely closed on my gen and the 2015 gen of trucks. There is a bleed off valve that releases some of the built up pressure from the fuel system, it does not vent everything to the air all at once though. This is to prevent tank bulging and distortion. And unless you put an aftermarket condensor with a chiller, the gas will evaporate. I'm not saying you'll lose 10 gallons if you don't drive it every day, but it will be enough to affect your total amount of fuel in your gas tank.

I fill up every two weeks. When I went to fill up the last time, I had lost around 3 gallons to evaporation. It was very hot and windy in southern Kansas over that time period. I rode my motorcycle more so my truck just sat in full sun and wind all day long. Since then, I have been driving my truck more and the temperatures have backed off some. I will fill up next week to see how many gallons it takes vs what the computer tells me I've used.

canoepaddler

Not uncommon to be off 10%.
Epa doesn't allow random vapor venting anymore. The evap solenoid opens only when vechile is running, requires engine vacuum and PCM needs to determine if ok . And the saturated vapor pressure for summer fuel is around 8psi.
A better reason for this gent not running out of gas is the expansion from the degree change of the fuel, could in theory be a gallon.

http://www.engineeringtoolbox.com/cubical-expansion-coefficients-d_1262.html

At least there is roadside assistance just in case next time

AbitaPro

If you lost 3 gallons in 2 weeks, you had better get to a dealer and have your fuel system checked!! I can guarantee a 3 gallon loss was not from evaporation.

Fuel system is pressurized, haven't you heard and smelled the fuel vapors escape under pressure when you remove your fuel cap in the summer? Fuel systems are designed to prevent even such minor vapors escaping directly through (permeation) the plastic fuel tanks, layered composite construction required, by the EPA. Surely they aren't going to ok a very small fuel system to vent into the atmosphere 1.5 gallons per week. If your statement was correct, think about all the fuel tanks there are, hell if one person lit a cigarette, the country would explode. Probably not, but your drinking water would taste like Shell or Chevron or Exxon, you get the point.

You can't base the difference between the fuel you add to your truck fuel tank, and what the truck computer says you used, and that difference is evaporating. many variables, but evaporation is not a major reason for the difference.

Livernois Motorsports

Thank you for the kind words! These new EcoBoost engines are phenomenal for tuning and performance mods, that is for sure.

We send you the tuner blank, have you retrieve the factory calibration codes we need and send those to us with your list of mods, octane preferred, type of driving you plan to do, etc. We then build you custom dyno tunes that are specific to you at that point. We also do offer tuning here on the dyno as well to further optimize the tunes if the customer would like for an additional cost of course. There are even some modifications / packages that we only support tuning in house on the chassis dyno as well, so yes that is always an option for sure.